![Adrian Hunter](/assets/img/avatar_default.png)
Add a new 'perf record' option '--kcore' which will put a copy of /proc/kcore, kallsyms and modules into a perf.data directory. Note, that without the --kcore option, output goes to a file as previously. The tools' -o and -i options work with either a file name or directory name. Example: $ sudo perf record --kcore uname $ sudo tree perf.data perf.data ├── kcore_dir │ ├── kallsyms │ ├── kcore │ └── modules └── data $ sudo perf script -v build id event received for vmlinux: 1eaa285996affce2d74d8e66dcea09a80c9941de build id event received for [vdso]: 8bbaf5dc62a9b644b4d4e4539737e104e4a84541 Samples for 'cycles' event do not have CPU attribute set. Skipping 'cpu' field. Using CPUID GenuineIntel-6-8E-A Using perf.data/kcore_dir/kcore for kernel data Using perf.data/kcore_dir/kallsyms for symbols perf 19058 506778.423729: 1 cycles: ffffffffa2caa548 native_write_msr+0x8 (vmlinux) perf 19058 506778.423733: 1 cycles: ffffffffa2caa548 native_write_msr+0x8 (vmlinux) perf 19058 506778.423734: 7 cycles: ffffffffa2caa548 native_write_msr+0x8 (vmlinux) perf 19058 506778.423736: 117 cycles: ffffffffa2caa54a native_write_msr+0xa (vmlinux) perf 19058 506778.423738: 2092 cycles: ffffffffa2c9b7b0 native_apic_msr_write+0x0 (vmlinux) perf 19058 506778.423740: 37380 cycles: ffffffffa2f121d0 perf_event_addr_filters_exec+0x0 (vmlinux) uname 19058 506778.423751: 582673 cycles: ffffffffa303a407 propagate_protected_usage+0x147 (vmlinux) uname 19058 506778.423892: 2241841 cycles: ffffffffa2cae0c9 unwind_next_frame.part.5+0x79 (vmlinux) uname 19058 506778.424430: 2457397 cycles: ffffffffa3019232 check_memory_region+0x52 (vmlinux) Committer testing: # rm -rf perf.data* # perf record sleep 1 [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.024 MB perf.data (7 samples) ] # ls -l perf.data -rw-------. 1 root root 34772 Oct 21 11:08 perf.data # perf record --kcore uname Linux [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.024 MB perf.data (7 samples) ] ls[root@quaco ~]# ls -lad perf.data* drwx------. 3 root root 4096 Oct 21 11:08 perf.data -rw-------. 1 root root 34772 Oct 21 11:08 perf.data.old # perf evlist -v cycles: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|PERIOD, read_format: ID, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, enable_on_exec: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1 # perf evlist -v -i perf.data/data cycles: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|PERIOD, read_format: ID, disabled: 1, inherit: 1, mmap: 1, comm: 1, freq: 1, enable_on_exec: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1, ksymbol: 1, bpf_event: 1 # Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Reviewed-by: Jiri Olsa <jolsa@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Link: http://lore.kernel.org/lkml/20191004083121.12182-6-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2398 lines
65 KiB
C
2398 lines
65 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <errno.h>
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#include <inttypes.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <linux/zalloc.h>
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#include <api/fs/fs.h>
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#include <byteswap.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <perf/cpumap.h>
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#include "map_symbol.h"
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#include "branch.h"
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#include "debug.h"
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#include "evlist.h"
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#include "evsel.h"
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#include "memswap.h"
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#include "map.h"
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#include "symbol.h"
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#include "session.h"
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#include "tool.h"
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#include "perf_regs.h"
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#include "asm/bug.h"
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#include "auxtrace.h"
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#include "thread.h"
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#include "thread-stack.h"
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#include "sample-raw.h"
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#include "stat.h"
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#include "ui/progress.h"
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#include "../perf.h"
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#include "arch/common.h"
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#include <internal/lib.h>
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#include <linux/err.h>
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#ifdef HAVE_ZSTD_SUPPORT
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static int perf_session__process_compressed_event(struct perf_session *session,
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union perf_event *event, u64 file_offset)
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{
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void *src;
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size_t decomp_size, src_size;
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u64 decomp_last_rem = 0;
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size_t mmap_len, decomp_len = session->header.env.comp_mmap_len;
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struct decomp *decomp, *decomp_last = session->decomp_last;
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if (decomp_last) {
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decomp_last_rem = decomp_last->size - decomp_last->head;
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decomp_len += decomp_last_rem;
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}
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mmap_len = sizeof(struct decomp) + decomp_len;
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decomp = mmap(NULL, mmap_len, PROT_READ|PROT_WRITE,
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MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
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if (decomp == MAP_FAILED) {
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pr_err("Couldn't allocate memory for decompression\n");
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return -1;
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}
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decomp->file_pos = file_offset;
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decomp->mmap_len = mmap_len;
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decomp->head = 0;
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if (decomp_last_rem) {
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memcpy(decomp->data, &(decomp_last->data[decomp_last->head]), decomp_last_rem);
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decomp->size = decomp_last_rem;
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}
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src = (void *)event + sizeof(struct perf_record_compressed);
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src_size = event->pack.header.size - sizeof(struct perf_record_compressed);
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decomp_size = zstd_decompress_stream(&(session->zstd_data), src, src_size,
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&(decomp->data[decomp_last_rem]), decomp_len - decomp_last_rem);
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if (!decomp_size) {
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munmap(decomp, mmap_len);
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pr_err("Couldn't decompress data\n");
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return -1;
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}
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decomp->size += decomp_size;
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if (session->decomp == NULL) {
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session->decomp = decomp;
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session->decomp_last = decomp;
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} else {
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session->decomp_last->next = decomp;
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session->decomp_last = decomp;
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}
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pr_debug("decomp (B): %ld to %ld\n", src_size, decomp_size);
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return 0;
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}
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#else /* !HAVE_ZSTD_SUPPORT */
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#define perf_session__process_compressed_event perf_session__process_compressed_event_stub
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#endif
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static int perf_session__deliver_event(struct perf_session *session,
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union perf_event *event,
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struct perf_tool *tool,
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u64 file_offset);
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static int perf_session__open(struct perf_session *session)
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{
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struct perf_data *data = session->data;
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if (perf_session__read_header(session) < 0) {
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pr_err("incompatible file format (rerun with -v to learn more)\n");
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return -1;
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}
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if (perf_data__is_pipe(data))
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return 0;
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if (perf_header__has_feat(&session->header, HEADER_STAT))
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return 0;
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if (!perf_evlist__valid_sample_type(session->evlist)) {
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pr_err("non matching sample_type\n");
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return -1;
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}
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if (!perf_evlist__valid_sample_id_all(session->evlist)) {
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pr_err("non matching sample_id_all\n");
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return -1;
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}
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if (!perf_evlist__valid_read_format(session->evlist)) {
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pr_err("non matching read_format\n");
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return -1;
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}
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return 0;
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}
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void perf_session__set_id_hdr_size(struct perf_session *session)
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{
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u16 id_hdr_size = perf_evlist__id_hdr_size(session->evlist);
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machines__set_id_hdr_size(&session->machines, id_hdr_size);
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}
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int perf_session__create_kernel_maps(struct perf_session *session)
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{
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int ret = machine__create_kernel_maps(&session->machines.host);
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if (ret >= 0)
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ret = machines__create_guest_kernel_maps(&session->machines);
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return ret;
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}
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static void perf_session__destroy_kernel_maps(struct perf_session *session)
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{
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machines__destroy_kernel_maps(&session->machines);
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}
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static bool perf_session__has_comm_exec(struct perf_session *session)
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{
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struct evsel *evsel;
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evlist__for_each_entry(session->evlist, evsel) {
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if (evsel->core.attr.comm_exec)
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return true;
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}
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return false;
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}
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static void perf_session__set_comm_exec(struct perf_session *session)
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{
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bool comm_exec = perf_session__has_comm_exec(session);
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machines__set_comm_exec(&session->machines, comm_exec);
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}
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static int ordered_events__deliver_event(struct ordered_events *oe,
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struct ordered_event *event)
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{
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struct perf_session *session = container_of(oe, struct perf_session,
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ordered_events);
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return perf_session__deliver_event(session, event->event,
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session->tool, event->file_offset);
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}
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struct perf_session *perf_session__new(struct perf_data *data,
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bool repipe, struct perf_tool *tool)
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{
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int ret = -ENOMEM;
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struct perf_session *session = zalloc(sizeof(*session));
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if (!session)
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goto out;
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session->repipe = repipe;
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session->tool = tool;
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INIT_LIST_HEAD(&session->auxtrace_index);
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machines__init(&session->machines);
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ordered_events__init(&session->ordered_events,
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ordered_events__deliver_event, NULL);
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perf_env__init(&session->header.env);
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if (data) {
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ret = perf_data__open(data);
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if (ret < 0)
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goto out_delete;
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session->data = data;
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if (perf_data__is_read(data)) {
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ret = perf_session__open(session);
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if (ret < 0)
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goto out_delete;
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/*
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* set session attributes that are present in perf.data
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* but not in pipe-mode.
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*/
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if (!data->is_pipe) {
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perf_session__set_id_hdr_size(session);
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perf_session__set_comm_exec(session);
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}
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perf_evlist__init_trace_event_sample_raw(session->evlist);
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/* Open the directory data. */
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if (data->is_dir) {
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ret = perf_data__open_dir(data);
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if (ret)
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goto out_delete;
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}
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if (!symbol_conf.kallsyms_name &&
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!symbol_conf.vmlinux_name)
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symbol_conf.kallsyms_name = perf_data__kallsyms_name(data);
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}
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} else {
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session->machines.host.env = &perf_env;
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}
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session->machines.host.single_address_space =
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perf_env__single_address_space(session->machines.host.env);
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if (!data || perf_data__is_write(data)) {
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/*
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* In O_RDONLY mode this will be performed when reading the
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* kernel MMAP event, in perf_event__process_mmap().
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*/
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if (perf_session__create_kernel_maps(session) < 0)
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pr_warning("Cannot read kernel map\n");
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}
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/*
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* In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is
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* processed, so perf_evlist__sample_id_all is not meaningful here.
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*/
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if ((!data || !data->is_pipe) && tool && tool->ordering_requires_timestamps &&
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tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) {
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dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n");
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tool->ordered_events = false;
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}
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return session;
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out_delete:
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perf_session__delete(session);
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out:
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return ERR_PTR(ret);
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}
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static void perf_session__delete_threads(struct perf_session *session)
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{
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machine__delete_threads(&session->machines.host);
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}
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static void perf_session__release_decomp_events(struct perf_session *session)
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{
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struct decomp *next, *decomp;
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size_t mmap_len;
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next = session->decomp;
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do {
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decomp = next;
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if (decomp == NULL)
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break;
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next = decomp->next;
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mmap_len = decomp->mmap_len;
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munmap(decomp, mmap_len);
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} while (1);
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}
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void perf_session__delete(struct perf_session *session)
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{
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if (session == NULL)
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return;
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auxtrace__free(session);
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auxtrace_index__free(&session->auxtrace_index);
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perf_session__destroy_kernel_maps(session);
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perf_session__delete_threads(session);
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perf_session__release_decomp_events(session);
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perf_env__exit(&session->header.env);
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machines__exit(&session->machines);
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if (session->data)
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perf_data__close(session->data);
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free(session);
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}
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static int process_event_synth_tracing_data_stub(struct perf_session *session
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__maybe_unused,
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union perf_event *event
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__maybe_unused)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_event_synth_attr_stub(struct perf_tool *tool __maybe_unused,
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union perf_event *event __maybe_unused,
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struct evlist **pevlist
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__maybe_unused)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_event_synth_event_update_stub(struct perf_tool *tool __maybe_unused,
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union perf_event *event __maybe_unused,
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struct evlist **pevlist
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__maybe_unused)
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{
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if (dump_trace)
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perf_event__fprintf_event_update(event, stdout);
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_event_sample_stub(struct perf_tool *tool __maybe_unused,
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union perf_event *event __maybe_unused,
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struct perf_sample *sample __maybe_unused,
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struct evsel *evsel __maybe_unused,
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struct machine *machine __maybe_unused)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_event_stub(struct perf_tool *tool __maybe_unused,
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union perf_event *event __maybe_unused,
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struct perf_sample *sample __maybe_unused,
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struct machine *machine __maybe_unused)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_finished_round_stub(struct perf_tool *tool __maybe_unused,
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union perf_event *event __maybe_unused,
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struct ordered_events *oe __maybe_unused)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_finished_round(struct perf_tool *tool,
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union perf_event *event,
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struct ordered_events *oe);
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static int skipn(int fd, off_t n)
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{
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char buf[4096];
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ssize_t ret;
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while (n > 0) {
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ret = read(fd, buf, min(n, (off_t)sizeof(buf)));
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if (ret <= 0)
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return ret;
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n -= ret;
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}
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return 0;
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}
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static s64 process_event_auxtrace_stub(struct perf_session *session __maybe_unused,
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union perf_event *event)
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{
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dump_printf(": unhandled!\n");
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if (perf_data__is_pipe(session->data))
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skipn(perf_data__fd(session->data), event->auxtrace.size);
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return event->auxtrace.size;
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}
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static int process_event_op2_stub(struct perf_session *session __maybe_unused,
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union perf_event *event __maybe_unused)
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{
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dump_printf(": unhandled!\n");
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return 0;
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}
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static
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int process_event_thread_map_stub(struct perf_session *session __maybe_unused,
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union perf_event *event __maybe_unused)
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{
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if (dump_trace)
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perf_event__fprintf_thread_map(event, stdout);
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dump_printf(": unhandled!\n");
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return 0;
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}
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static
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int process_event_cpu_map_stub(struct perf_session *session __maybe_unused,
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union perf_event *event __maybe_unused)
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{
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if (dump_trace)
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perf_event__fprintf_cpu_map(event, stdout);
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dump_printf(": unhandled!\n");
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return 0;
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}
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static
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int process_event_stat_config_stub(struct perf_session *session __maybe_unused,
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union perf_event *event __maybe_unused)
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{
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if (dump_trace)
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perf_event__fprintf_stat_config(event, stdout);
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_stat_stub(struct perf_session *perf_session __maybe_unused,
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union perf_event *event)
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{
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if (dump_trace)
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perf_event__fprintf_stat(event, stdout);
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int process_stat_round_stub(struct perf_session *perf_session __maybe_unused,
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union perf_event *event)
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{
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if (dump_trace)
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perf_event__fprintf_stat_round(event, stdout);
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dump_printf(": unhandled!\n");
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return 0;
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}
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static int perf_session__process_compressed_event_stub(struct perf_session *session __maybe_unused,
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union perf_event *event __maybe_unused,
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u64 file_offset __maybe_unused)
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{
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dump_printf(": unhandled!\n");
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|
return 0;
|
|
}
|
|
|
|
void perf_tool__fill_defaults(struct perf_tool *tool)
|
|
{
|
|
if (tool->sample == NULL)
|
|
tool->sample = process_event_sample_stub;
|
|
if (tool->mmap == NULL)
|
|
tool->mmap = process_event_stub;
|
|
if (tool->mmap2 == NULL)
|
|
tool->mmap2 = process_event_stub;
|
|
if (tool->comm == NULL)
|
|
tool->comm = process_event_stub;
|
|
if (tool->namespaces == NULL)
|
|
tool->namespaces = process_event_stub;
|
|
if (tool->fork == NULL)
|
|
tool->fork = process_event_stub;
|
|
if (tool->exit == NULL)
|
|
tool->exit = process_event_stub;
|
|
if (tool->lost == NULL)
|
|
tool->lost = perf_event__process_lost;
|
|
if (tool->lost_samples == NULL)
|
|
tool->lost_samples = perf_event__process_lost_samples;
|
|
if (tool->aux == NULL)
|
|
tool->aux = perf_event__process_aux;
|
|
if (tool->itrace_start == NULL)
|
|
tool->itrace_start = perf_event__process_itrace_start;
|
|
if (tool->context_switch == NULL)
|
|
tool->context_switch = perf_event__process_switch;
|
|
if (tool->ksymbol == NULL)
|
|
tool->ksymbol = perf_event__process_ksymbol;
|
|
if (tool->bpf == NULL)
|
|
tool->bpf = perf_event__process_bpf;
|
|
if (tool->read == NULL)
|
|
tool->read = process_event_sample_stub;
|
|
if (tool->throttle == NULL)
|
|
tool->throttle = process_event_stub;
|
|
if (tool->unthrottle == NULL)
|
|
tool->unthrottle = process_event_stub;
|
|
if (tool->attr == NULL)
|
|
tool->attr = process_event_synth_attr_stub;
|
|
if (tool->event_update == NULL)
|
|
tool->event_update = process_event_synth_event_update_stub;
|
|
if (tool->tracing_data == NULL)
|
|
tool->tracing_data = process_event_synth_tracing_data_stub;
|
|
if (tool->build_id == NULL)
|
|
tool->build_id = process_event_op2_stub;
|
|
if (tool->finished_round == NULL) {
|
|
if (tool->ordered_events)
|
|
tool->finished_round = process_finished_round;
|
|
else
|
|
tool->finished_round = process_finished_round_stub;
|
|
}
|
|
if (tool->id_index == NULL)
|
|
tool->id_index = process_event_op2_stub;
|
|
if (tool->auxtrace_info == NULL)
|
|
tool->auxtrace_info = process_event_op2_stub;
|
|
if (tool->auxtrace == NULL)
|
|
tool->auxtrace = process_event_auxtrace_stub;
|
|
if (tool->auxtrace_error == NULL)
|
|
tool->auxtrace_error = process_event_op2_stub;
|
|
if (tool->thread_map == NULL)
|
|
tool->thread_map = process_event_thread_map_stub;
|
|
if (tool->cpu_map == NULL)
|
|
tool->cpu_map = process_event_cpu_map_stub;
|
|
if (tool->stat_config == NULL)
|
|
tool->stat_config = process_event_stat_config_stub;
|
|
if (tool->stat == NULL)
|
|
tool->stat = process_stat_stub;
|
|
if (tool->stat_round == NULL)
|
|
tool->stat_round = process_stat_round_stub;
|
|
if (tool->time_conv == NULL)
|
|
tool->time_conv = process_event_op2_stub;
|
|
if (tool->feature == NULL)
|
|
tool->feature = process_event_op2_stub;
|
|
if (tool->compressed == NULL)
|
|
tool->compressed = perf_session__process_compressed_event;
|
|
}
|
|
|
|
static void swap_sample_id_all(union perf_event *event, void *data)
|
|
{
|
|
void *end = (void *) event + event->header.size;
|
|
int size = end - data;
|
|
|
|
BUG_ON(size % sizeof(u64));
|
|
mem_bswap_64(data, size);
|
|
}
|
|
|
|
static void perf_event__all64_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
struct perf_event_header *hdr = &event->header;
|
|
mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
|
|
}
|
|
|
|
static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
|
|
{
|
|
event->comm.pid = bswap_32(event->comm.pid);
|
|
event->comm.tid = bswap_32(event->comm.tid);
|
|
|
|
if (sample_id_all) {
|
|
void *data = &event->comm.comm;
|
|
|
|
data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
|
|
swap_sample_id_all(event, data);
|
|
}
|
|
}
|
|
|
|
static void perf_event__mmap_swap(union perf_event *event,
|
|
bool sample_id_all)
|
|
{
|
|
event->mmap.pid = bswap_32(event->mmap.pid);
|
|
event->mmap.tid = bswap_32(event->mmap.tid);
|
|
event->mmap.start = bswap_64(event->mmap.start);
|
|
event->mmap.len = bswap_64(event->mmap.len);
|
|
event->mmap.pgoff = bswap_64(event->mmap.pgoff);
|
|
|
|
if (sample_id_all) {
|
|
void *data = &event->mmap.filename;
|
|
|
|
data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
|
|
swap_sample_id_all(event, data);
|
|
}
|
|
}
|
|
|
|
static void perf_event__mmap2_swap(union perf_event *event,
|
|
bool sample_id_all)
|
|
{
|
|
event->mmap2.pid = bswap_32(event->mmap2.pid);
|
|
event->mmap2.tid = bswap_32(event->mmap2.tid);
|
|
event->mmap2.start = bswap_64(event->mmap2.start);
|
|
event->mmap2.len = bswap_64(event->mmap2.len);
|
|
event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
|
|
event->mmap2.maj = bswap_32(event->mmap2.maj);
|
|
event->mmap2.min = bswap_32(event->mmap2.min);
|
|
event->mmap2.ino = bswap_64(event->mmap2.ino);
|
|
|
|
if (sample_id_all) {
|
|
void *data = &event->mmap2.filename;
|
|
|
|
data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
|
|
swap_sample_id_all(event, data);
|
|
}
|
|
}
|
|
static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
|
|
{
|
|
event->fork.pid = bswap_32(event->fork.pid);
|
|
event->fork.tid = bswap_32(event->fork.tid);
|
|
event->fork.ppid = bswap_32(event->fork.ppid);
|
|
event->fork.ptid = bswap_32(event->fork.ptid);
|
|
event->fork.time = bswap_64(event->fork.time);
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->fork + 1);
|
|
}
|
|
|
|
static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
|
|
{
|
|
event->read.pid = bswap_32(event->read.pid);
|
|
event->read.tid = bswap_32(event->read.tid);
|
|
event->read.value = bswap_64(event->read.value);
|
|
event->read.time_enabled = bswap_64(event->read.time_enabled);
|
|
event->read.time_running = bswap_64(event->read.time_running);
|
|
event->read.id = bswap_64(event->read.id);
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->read + 1);
|
|
}
|
|
|
|
static void perf_event__aux_swap(union perf_event *event, bool sample_id_all)
|
|
{
|
|
event->aux.aux_offset = bswap_64(event->aux.aux_offset);
|
|
event->aux.aux_size = bswap_64(event->aux.aux_size);
|
|
event->aux.flags = bswap_64(event->aux.flags);
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->aux + 1);
|
|
}
|
|
|
|
static void perf_event__itrace_start_swap(union perf_event *event,
|
|
bool sample_id_all)
|
|
{
|
|
event->itrace_start.pid = bswap_32(event->itrace_start.pid);
|
|
event->itrace_start.tid = bswap_32(event->itrace_start.tid);
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->itrace_start + 1);
|
|
}
|
|
|
|
static void perf_event__switch_swap(union perf_event *event, bool sample_id_all)
|
|
{
|
|
if (event->header.type == PERF_RECORD_SWITCH_CPU_WIDE) {
|
|
event->context_switch.next_prev_pid =
|
|
bswap_32(event->context_switch.next_prev_pid);
|
|
event->context_switch.next_prev_tid =
|
|
bswap_32(event->context_switch.next_prev_tid);
|
|
}
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->context_switch + 1);
|
|
}
|
|
|
|
static void perf_event__throttle_swap(union perf_event *event,
|
|
bool sample_id_all)
|
|
{
|
|
event->throttle.time = bswap_64(event->throttle.time);
|
|
event->throttle.id = bswap_64(event->throttle.id);
|
|
event->throttle.stream_id = bswap_64(event->throttle.stream_id);
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->throttle + 1);
|
|
}
|
|
|
|
static void perf_event__namespaces_swap(union perf_event *event,
|
|
bool sample_id_all)
|
|
{
|
|
u64 i;
|
|
|
|
event->namespaces.pid = bswap_32(event->namespaces.pid);
|
|
event->namespaces.tid = bswap_32(event->namespaces.tid);
|
|
event->namespaces.nr_namespaces = bswap_64(event->namespaces.nr_namespaces);
|
|
|
|
for (i = 0; i < event->namespaces.nr_namespaces; i++) {
|
|
struct perf_ns_link_info *ns = &event->namespaces.link_info[i];
|
|
|
|
ns->dev = bswap_64(ns->dev);
|
|
ns->ino = bswap_64(ns->ino);
|
|
}
|
|
|
|
if (sample_id_all)
|
|
swap_sample_id_all(event, &event->namespaces.link_info[i]);
|
|
}
|
|
|
|
static u8 revbyte(u8 b)
|
|
{
|
|
int rev = (b >> 4) | ((b & 0xf) << 4);
|
|
rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
|
|
rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
|
|
return (u8) rev;
|
|
}
|
|
|
|
/*
|
|
* XXX this is hack in attempt to carry flags bitfield
|
|
* through endian village. ABI says:
|
|
*
|
|
* Bit-fields are allocated from right to left (least to most significant)
|
|
* on little-endian implementations and from left to right (most to least
|
|
* significant) on big-endian implementations.
|
|
*
|
|
* The above seems to be byte specific, so we need to reverse each
|
|
* byte of the bitfield. 'Internet' also says this might be implementation
|
|
* specific and we probably need proper fix and carry perf_event_attr
|
|
* bitfield flags in separate data file FEAT_ section. Thought this seems
|
|
* to work for now.
|
|
*/
|
|
static void swap_bitfield(u8 *p, unsigned len)
|
|
{
|
|
unsigned i;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
*p = revbyte(*p);
|
|
p++;
|
|
}
|
|
}
|
|
|
|
/* exported for swapping attributes in file header */
|
|
void perf_event__attr_swap(struct perf_event_attr *attr)
|
|
{
|
|
attr->type = bswap_32(attr->type);
|
|
attr->size = bswap_32(attr->size);
|
|
|
|
#define bswap_safe(f, n) \
|
|
(attr->size > (offsetof(struct perf_event_attr, f) + \
|
|
sizeof(attr->f) * (n)))
|
|
#define bswap_field(f, sz) \
|
|
do { \
|
|
if (bswap_safe(f, 0)) \
|
|
attr->f = bswap_##sz(attr->f); \
|
|
} while(0)
|
|
#define bswap_field_16(f) bswap_field(f, 16)
|
|
#define bswap_field_32(f) bswap_field(f, 32)
|
|
#define bswap_field_64(f) bswap_field(f, 64)
|
|
|
|
bswap_field_64(config);
|
|
bswap_field_64(sample_period);
|
|
bswap_field_64(sample_type);
|
|
bswap_field_64(read_format);
|
|
bswap_field_32(wakeup_events);
|
|
bswap_field_32(bp_type);
|
|
bswap_field_64(bp_addr);
|
|
bswap_field_64(bp_len);
|
|
bswap_field_64(branch_sample_type);
|
|
bswap_field_64(sample_regs_user);
|
|
bswap_field_32(sample_stack_user);
|
|
bswap_field_32(aux_watermark);
|
|
bswap_field_16(sample_max_stack);
|
|
|
|
/*
|
|
* After read_format are bitfields. Check read_format because
|
|
* we are unable to use offsetof on bitfield.
|
|
*/
|
|
if (bswap_safe(read_format, 1))
|
|
swap_bitfield((u8 *) (&attr->read_format + 1),
|
|
sizeof(u64));
|
|
#undef bswap_field_64
|
|
#undef bswap_field_32
|
|
#undef bswap_field
|
|
#undef bswap_safe
|
|
}
|
|
|
|
static void perf_event__hdr_attr_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
size_t size;
|
|
|
|
perf_event__attr_swap(&event->attr.attr);
|
|
|
|
size = event->header.size;
|
|
size -= (void *)&event->attr.id - (void *)event;
|
|
mem_bswap_64(event->attr.id, size);
|
|
}
|
|
|
|
static void perf_event__event_update_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->event_update.type = bswap_64(event->event_update.type);
|
|
event->event_update.id = bswap_64(event->event_update.id);
|
|
}
|
|
|
|
static void perf_event__event_type_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->event_type.event_type.event_id =
|
|
bswap_64(event->event_type.event_type.event_id);
|
|
}
|
|
|
|
static void perf_event__tracing_data_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->tracing_data.size = bswap_32(event->tracing_data.size);
|
|
}
|
|
|
|
static void perf_event__auxtrace_info_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
size_t size;
|
|
|
|
event->auxtrace_info.type = bswap_32(event->auxtrace_info.type);
|
|
|
|
size = event->header.size;
|
|
size -= (void *)&event->auxtrace_info.priv - (void *)event;
|
|
mem_bswap_64(event->auxtrace_info.priv, size);
|
|
}
|
|
|
|
static void perf_event__auxtrace_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->auxtrace.size = bswap_64(event->auxtrace.size);
|
|
event->auxtrace.offset = bswap_64(event->auxtrace.offset);
|
|
event->auxtrace.reference = bswap_64(event->auxtrace.reference);
|
|
event->auxtrace.idx = bswap_32(event->auxtrace.idx);
|
|
event->auxtrace.tid = bswap_32(event->auxtrace.tid);
|
|
event->auxtrace.cpu = bswap_32(event->auxtrace.cpu);
|
|
}
|
|
|
|
static void perf_event__auxtrace_error_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->auxtrace_error.type = bswap_32(event->auxtrace_error.type);
|
|
event->auxtrace_error.code = bswap_32(event->auxtrace_error.code);
|
|
event->auxtrace_error.cpu = bswap_32(event->auxtrace_error.cpu);
|
|
event->auxtrace_error.pid = bswap_32(event->auxtrace_error.pid);
|
|
event->auxtrace_error.tid = bswap_32(event->auxtrace_error.tid);
|
|
event->auxtrace_error.fmt = bswap_32(event->auxtrace_error.fmt);
|
|
event->auxtrace_error.ip = bswap_64(event->auxtrace_error.ip);
|
|
if (event->auxtrace_error.fmt)
|
|
event->auxtrace_error.time = bswap_64(event->auxtrace_error.time);
|
|
}
|
|
|
|
static void perf_event__thread_map_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
unsigned i;
|
|
|
|
event->thread_map.nr = bswap_64(event->thread_map.nr);
|
|
|
|
for (i = 0; i < event->thread_map.nr; i++)
|
|
event->thread_map.entries[i].pid = bswap_64(event->thread_map.entries[i].pid);
|
|
}
|
|
|
|
static void perf_event__cpu_map_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
struct perf_record_cpu_map_data *data = &event->cpu_map.data;
|
|
struct cpu_map_entries *cpus;
|
|
struct perf_record_record_cpu_map *mask;
|
|
unsigned i;
|
|
|
|
data->type = bswap_64(data->type);
|
|
|
|
switch (data->type) {
|
|
case PERF_CPU_MAP__CPUS:
|
|
cpus = (struct cpu_map_entries *)data->data;
|
|
|
|
cpus->nr = bswap_16(cpus->nr);
|
|
|
|
for (i = 0; i < cpus->nr; i++)
|
|
cpus->cpu[i] = bswap_16(cpus->cpu[i]);
|
|
break;
|
|
case PERF_CPU_MAP__MASK:
|
|
mask = (struct perf_record_record_cpu_map *)data->data;
|
|
|
|
mask->nr = bswap_16(mask->nr);
|
|
mask->long_size = bswap_16(mask->long_size);
|
|
|
|
switch (mask->long_size) {
|
|
case 4: mem_bswap_32(&mask->mask, mask->nr); break;
|
|
case 8: mem_bswap_64(&mask->mask, mask->nr); break;
|
|
default:
|
|
pr_err("cpu_map swap: unsupported long size\n");
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void perf_event__stat_config_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
u64 size;
|
|
|
|
size = event->stat_config.nr * sizeof(event->stat_config.data[0]);
|
|
size += 1; /* nr item itself */
|
|
mem_bswap_64(&event->stat_config.nr, size);
|
|
}
|
|
|
|
static void perf_event__stat_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->stat.id = bswap_64(event->stat.id);
|
|
event->stat.thread = bswap_32(event->stat.thread);
|
|
event->stat.cpu = bswap_32(event->stat.cpu);
|
|
event->stat.val = bswap_64(event->stat.val);
|
|
event->stat.ena = bswap_64(event->stat.ena);
|
|
event->stat.run = bswap_64(event->stat.run);
|
|
}
|
|
|
|
static void perf_event__stat_round_swap(union perf_event *event,
|
|
bool sample_id_all __maybe_unused)
|
|
{
|
|
event->stat_round.type = bswap_64(event->stat_round.type);
|
|
event->stat_round.time = bswap_64(event->stat_round.time);
|
|
}
|
|
|
|
typedef void (*perf_event__swap_op)(union perf_event *event,
|
|
bool sample_id_all);
|
|
|
|
static perf_event__swap_op perf_event__swap_ops[] = {
|
|
[PERF_RECORD_MMAP] = perf_event__mmap_swap,
|
|
[PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
|
|
[PERF_RECORD_COMM] = perf_event__comm_swap,
|
|
[PERF_RECORD_FORK] = perf_event__task_swap,
|
|
[PERF_RECORD_EXIT] = perf_event__task_swap,
|
|
[PERF_RECORD_LOST] = perf_event__all64_swap,
|
|
[PERF_RECORD_READ] = perf_event__read_swap,
|
|
[PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
|
|
[PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
|
|
[PERF_RECORD_SAMPLE] = perf_event__all64_swap,
|
|
[PERF_RECORD_AUX] = perf_event__aux_swap,
|
|
[PERF_RECORD_ITRACE_START] = perf_event__itrace_start_swap,
|
|
[PERF_RECORD_LOST_SAMPLES] = perf_event__all64_swap,
|
|
[PERF_RECORD_SWITCH] = perf_event__switch_swap,
|
|
[PERF_RECORD_SWITCH_CPU_WIDE] = perf_event__switch_swap,
|
|
[PERF_RECORD_NAMESPACES] = perf_event__namespaces_swap,
|
|
[PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
|
|
[PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
|
|
[PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
|
|
[PERF_RECORD_HEADER_BUILD_ID] = NULL,
|
|
[PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
|
|
[PERF_RECORD_AUXTRACE_INFO] = perf_event__auxtrace_info_swap,
|
|
[PERF_RECORD_AUXTRACE] = perf_event__auxtrace_swap,
|
|
[PERF_RECORD_AUXTRACE_ERROR] = perf_event__auxtrace_error_swap,
|
|
[PERF_RECORD_THREAD_MAP] = perf_event__thread_map_swap,
|
|
[PERF_RECORD_CPU_MAP] = perf_event__cpu_map_swap,
|
|
[PERF_RECORD_STAT_CONFIG] = perf_event__stat_config_swap,
|
|
[PERF_RECORD_STAT] = perf_event__stat_swap,
|
|
[PERF_RECORD_STAT_ROUND] = perf_event__stat_round_swap,
|
|
[PERF_RECORD_EVENT_UPDATE] = perf_event__event_update_swap,
|
|
[PERF_RECORD_TIME_CONV] = perf_event__all64_swap,
|
|
[PERF_RECORD_HEADER_MAX] = NULL,
|
|
};
|
|
|
|
/*
|
|
* When perf record finishes a pass on every buffers, it records this pseudo
|
|
* event.
|
|
* We record the max timestamp t found in the pass n.
|
|
* Assuming these timestamps are monotonic across cpus, we know that if
|
|
* a buffer still has events with timestamps below t, they will be all
|
|
* available and then read in the pass n + 1.
|
|
* Hence when we start to read the pass n + 2, we can safely flush every
|
|
* events with timestamps below t.
|
|
*
|
|
* ============ PASS n =================
|
|
* CPU 0 | CPU 1
|
|
* |
|
|
* cnt1 timestamps | cnt2 timestamps
|
|
* 1 | 2
|
|
* 2 | 3
|
|
* - | 4 <--- max recorded
|
|
*
|
|
* ============ PASS n + 1 ==============
|
|
* CPU 0 | CPU 1
|
|
* |
|
|
* cnt1 timestamps | cnt2 timestamps
|
|
* 3 | 5
|
|
* 4 | 6
|
|
* 5 | 7 <---- max recorded
|
|
*
|
|
* Flush every events below timestamp 4
|
|
*
|
|
* ============ PASS n + 2 ==============
|
|
* CPU 0 | CPU 1
|
|
* |
|
|
* cnt1 timestamps | cnt2 timestamps
|
|
* 6 | 8
|
|
* 7 | 9
|
|
* - | 10
|
|
*
|
|
* Flush every events below timestamp 7
|
|
* etc...
|
|
*/
|
|
static int process_finished_round(struct perf_tool *tool __maybe_unused,
|
|
union perf_event *event __maybe_unused,
|
|
struct ordered_events *oe)
|
|
{
|
|
if (dump_trace)
|
|
fprintf(stdout, "\n");
|
|
return ordered_events__flush(oe, OE_FLUSH__ROUND);
|
|
}
|
|
|
|
int perf_session__queue_event(struct perf_session *s, union perf_event *event,
|
|
u64 timestamp, u64 file_offset)
|
|
{
|
|
return ordered_events__queue(&s->ordered_events, event, timestamp, file_offset);
|
|
}
|
|
|
|
static void callchain__lbr_callstack_printf(struct perf_sample *sample)
|
|
{
|
|
struct ip_callchain *callchain = sample->callchain;
|
|
struct branch_stack *lbr_stack = sample->branch_stack;
|
|
u64 kernel_callchain_nr = callchain->nr;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < kernel_callchain_nr; i++) {
|
|
if (callchain->ips[i] == PERF_CONTEXT_USER)
|
|
break;
|
|
}
|
|
|
|
if ((i != kernel_callchain_nr) && lbr_stack->nr) {
|
|
u64 total_nr;
|
|
/*
|
|
* LBR callstack can only get user call chain,
|
|
* i is kernel call chain number,
|
|
* 1 is PERF_CONTEXT_USER.
|
|
*
|
|
* The user call chain is stored in LBR registers.
|
|
* LBR are pair registers. The caller is stored
|
|
* in "from" register, while the callee is stored
|
|
* in "to" register.
|
|
* For example, there is a call stack
|
|
* "A"->"B"->"C"->"D".
|
|
* The LBR registers will recorde like
|
|
* "C"->"D", "B"->"C", "A"->"B".
|
|
* So only the first "to" register and all "from"
|
|
* registers are needed to construct the whole stack.
|
|
*/
|
|
total_nr = i + 1 + lbr_stack->nr + 1;
|
|
kernel_callchain_nr = i + 1;
|
|
|
|
printf("... LBR call chain: nr:%" PRIu64 "\n", total_nr);
|
|
|
|
for (i = 0; i < kernel_callchain_nr; i++)
|
|
printf("..... %2d: %016" PRIx64 "\n",
|
|
i, callchain->ips[i]);
|
|
|
|
printf("..... %2d: %016" PRIx64 "\n",
|
|
(int)(kernel_callchain_nr), lbr_stack->entries[0].to);
|
|
for (i = 0; i < lbr_stack->nr; i++)
|
|
printf("..... %2d: %016" PRIx64 "\n",
|
|
(int)(i + kernel_callchain_nr + 1), lbr_stack->entries[i].from);
|
|
}
|
|
}
|
|
|
|
static void callchain__printf(struct evsel *evsel,
|
|
struct perf_sample *sample)
|
|
{
|
|
unsigned int i;
|
|
struct ip_callchain *callchain = sample->callchain;
|
|
|
|
if (perf_evsel__has_branch_callstack(evsel))
|
|
callchain__lbr_callstack_printf(sample);
|
|
|
|
printf("... FP chain: nr:%" PRIu64 "\n", callchain->nr);
|
|
|
|
for (i = 0; i < callchain->nr; i++)
|
|
printf("..... %2d: %016" PRIx64 "\n",
|
|
i, callchain->ips[i]);
|
|
}
|
|
|
|
static void branch_stack__printf(struct perf_sample *sample, bool callstack)
|
|
{
|
|
uint64_t i;
|
|
|
|
printf("%s: nr:%" PRIu64 "\n",
|
|
!callstack ? "... branch stack" : "... branch callstack",
|
|
sample->branch_stack->nr);
|
|
|
|
for (i = 0; i < sample->branch_stack->nr; i++) {
|
|
struct branch_entry *e = &sample->branch_stack->entries[i];
|
|
|
|
if (!callstack) {
|
|
printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 " %hu cycles %s%s%s%s %x\n",
|
|
i, e->from, e->to,
|
|
(unsigned short)e->flags.cycles,
|
|
e->flags.mispred ? "M" : " ",
|
|
e->flags.predicted ? "P" : " ",
|
|
e->flags.abort ? "A" : " ",
|
|
e->flags.in_tx ? "T" : " ",
|
|
(unsigned)e->flags.reserved);
|
|
} else {
|
|
printf("..... %2"PRIu64": %016" PRIx64 "\n",
|
|
i, i > 0 ? e->from : e->to);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void regs_dump__printf(u64 mask, u64 *regs)
|
|
{
|
|
unsigned rid, i = 0;
|
|
|
|
for_each_set_bit(rid, (unsigned long *) &mask, sizeof(mask) * 8) {
|
|
u64 val = regs[i++];
|
|
|
|
printf(".... %-5s 0x%" PRIx64 "\n",
|
|
perf_reg_name(rid), val);
|
|
}
|
|
}
|
|
|
|
static const char *regs_abi[] = {
|
|
[PERF_SAMPLE_REGS_ABI_NONE] = "none",
|
|
[PERF_SAMPLE_REGS_ABI_32] = "32-bit",
|
|
[PERF_SAMPLE_REGS_ABI_64] = "64-bit",
|
|
};
|
|
|
|
static inline const char *regs_dump_abi(struct regs_dump *d)
|
|
{
|
|
if (d->abi > PERF_SAMPLE_REGS_ABI_64)
|
|
return "unknown";
|
|
|
|
return regs_abi[d->abi];
|
|
}
|
|
|
|
static void regs__printf(const char *type, struct regs_dump *regs)
|
|
{
|
|
u64 mask = regs->mask;
|
|
|
|
printf("... %s regs: mask 0x%" PRIx64 " ABI %s\n",
|
|
type,
|
|
mask,
|
|
regs_dump_abi(regs));
|
|
|
|
regs_dump__printf(mask, regs->regs);
|
|
}
|
|
|
|
static void regs_user__printf(struct perf_sample *sample)
|
|
{
|
|
struct regs_dump *user_regs = &sample->user_regs;
|
|
|
|
if (user_regs->regs)
|
|
regs__printf("user", user_regs);
|
|
}
|
|
|
|
static void regs_intr__printf(struct perf_sample *sample)
|
|
{
|
|
struct regs_dump *intr_regs = &sample->intr_regs;
|
|
|
|
if (intr_regs->regs)
|
|
regs__printf("intr", intr_regs);
|
|
}
|
|
|
|
static void stack_user__printf(struct stack_dump *dump)
|
|
{
|
|
printf("... ustack: size %" PRIu64 ", offset 0x%x\n",
|
|
dump->size, dump->offset);
|
|
}
|
|
|
|
static void perf_evlist__print_tstamp(struct evlist *evlist,
|
|
union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
u64 sample_type = __perf_evlist__combined_sample_type(evlist);
|
|
|
|
if (event->header.type != PERF_RECORD_SAMPLE &&
|
|
!perf_evlist__sample_id_all(evlist)) {
|
|
fputs("-1 -1 ", stdout);
|
|
return;
|
|
}
|
|
|
|
if ((sample_type & PERF_SAMPLE_CPU))
|
|
printf("%u ", sample->cpu);
|
|
|
|
if (sample_type & PERF_SAMPLE_TIME)
|
|
printf("%" PRIu64 " ", sample->time);
|
|
}
|
|
|
|
static void sample_read__printf(struct perf_sample *sample, u64 read_format)
|
|
{
|
|
printf("... sample_read:\n");
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
|
|
printf("...... time enabled %016" PRIx64 "\n",
|
|
sample->read.time_enabled);
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
|
|
printf("...... time running %016" PRIx64 "\n",
|
|
sample->read.time_running);
|
|
|
|
if (read_format & PERF_FORMAT_GROUP) {
|
|
u64 i;
|
|
|
|
printf(".... group nr %" PRIu64 "\n", sample->read.group.nr);
|
|
|
|
for (i = 0; i < sample->read.group.nr; i++) {
|
|
struct sample_read_value *value;
|
|
|
|
value = &sample->read.group.values[i];
|
|
printf("..... id %016" PRIx64
|
|
", value %016" PRIx64 "\n",
|
|
value->id, value->value);
|
|
}
|
|
} else
|
|
printf("..... id %016" PRIx64 ", value %016" PRIx64 "\n",
|
|
sample->read.one.id, sample->read.one.value);
|
|
}
|
|
|
|
static void dump_event(struct evlist *evlist, union perf_event *event,
|
|
u64 file_offset, struct perf_sample *sample)
|
|
{
|
|
if (!dump_trace)
|
|
return;
|
|
|
|
printf("\n%#" PRIx64 " [%#x]: event: %d\n",
|
|
file_offset, event->header.size, event->header.type);
|
|
|
|
trace_event(event);
|
|
if (event->header.type == PERF_RECORD_SAMPLE && evlist->trace_event_sample_raw)
|
|
evlist->trace_event_sample_raw(evlist, event, sample);
|
|
|
|
if (sample)
|
|
perf_evlist__print_tstamp(evlist, event, sample);
|
|
|
|
printf("%#" PRIx64 " [%#x]: PERF_RECORD_%s", file_offset,
|
|
event->header.size, perf_event__name(event->header.type));
|
|
}
|
|
|
|
static void dump_sample(struct evsel *evsel, union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
u64 sample_type;
|
|
|
|
if (!dump_trace)
|
|
return;
|
|
|
|
printf("(IP, 0x%x): %d/%d: %#" PRIx64 " period: %" PRIu64 " addr: %#" PRIx64 "\n",
|
|
event->header.misc, sample->pid, sample->tid, sample->ip,
|
|
sample->period, sample->addr);
|
|
|
|
sample_type = evsel->core.attr.sample_type;
|
|
|
|
if (evsel__has_callchain(evsel))
|
|
callchain__printf(evsel, sample);
|
|
|
|
if (sample_type & PERF_SAMPLE_BRANCH_STACK)
|
|
branch_stack__printf(sample, perf_evsel__has_branch_callstack(evsel));
|
|
|
|
if (sample_type & PERF_SAMPLE_REGS_USER)
|
|
regs_user__printf(sample);
|
|
|
|
if (sample_type & PERF_SAMPLE_REGS_INTR)
|
|
regs_intr__printf(sample);
|
|
|
|
if (sample_type & PERF_SAMPLE_STACK_USER)
|
|
stack_user__printf(&sample->user_stack);
|
|
|
|
if (sample_type & PERF_SAMPLE_WEIGHT)
|
|
printf("... weight: %" PRIu64 "\n", sample->weight);
|
|
|
|
if (sample_type & PERF_SAMPLE_DATA_SRC)
|
|
printf(" . data_src: 0x%"PRIx64"\n", sample->data_src);
|
|
|
|
if (sample_type & PERF_SAMPLE_PHYS_ADDR)
|
|
printf(" .. phys_addr: 0x%"PRIx64"\n", sample->phys_addr);
|
|
|
|
if (sample_type & PERF_SAMPLE_TRANSACTION)
|
|
printf("... transaction: %" PRIx64 "\n", sample->transaction);
|
|
|
|
if (sample_type & PERF_SAMPLE_READ)
|
|
sample_read__printf(sample, evsel->core.attr.read_format);
|
|
}
|
|
|
|
static void dump_read(struct evsel *evsel, union perf_event *event)
|
|
{
|
|
struct perf_record_read *read_event = &event->read;
|
|
u64 read_format;
|
|
|
|
if (!dump_trace)
|
|
return;
|
|
|
|
printf(": %d %d %s %" PRI_lu64 "\n", event->read.pid, event->read.tid,
|
|
perf_evsel__name(evsel),
|
|
event->read.value);
|
|
|
|
if (!evsel)
|
|
return;
|
|
|
|
read_format = evsel->core.attr.read_format;
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED)
|
|
printf("... time enabled : %" PRI_lu64 "\n", read_event->time_enabled);
|
|
|
|
if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING)
|
|
printf("... time running : %" PRI_lu64 "\n", read_event->time_running);
|
|
|
|
if (read_format & PERF_FORMAT_ID)
|
|
printf("... id : %" PRI_lu64 "\n", read_event->id);
|
|
}
|
|
|
|
static struct machine *machines__find_for_cpumode(struct machines *machines,
|
|
union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
struct machine *machine;
|
|
|
|
if (perf_guest &&
|
|
((sample->cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
|
|
(sample->cpumode == PERF_RECORD_MISC_GUEST_USER))) {
|
|
u32 pid;
|
|
|
|
if (event->header.type == PERF_RECORD_MMAP
|
|
|| event->header.type == PERF_RECORD_MMAP2)
|
|
pid = event->mmap.pid;
|
|
else
|
|
pid = sample->pid;
|
|
|
|
machine = machines__find(machines, pid);
|
|
if (!machine)
|
|
machine = machines__findnew(machines, DEFAULT_GUEST_KERNEL_ID);
|
|
return machine;
|
|
}
|
|
|
|
return &machines->host;
|
|
}
|
|
|
|
static int deliver_sample_value(struct evlist *evlist,
|
|
struct perf_tool *tool,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct sample_read_value *v,
|
|
struct machine *machine)
|
|
{
|
|
struct perf_sample_id *sid = perf_evlist__id2sid(evlist, v->id);
|
|
struct evsel *evsel;
|
|
|
|
if (sid) {
|
|
sample->id = v->id;
|
|
sample->period = v->value - sid->period;
|
|
sid->period = v->value;
|
|
}
|
|
|
|
if (!sid || sid->evsel == NULL) {
|
|
++evlist->stats.nr_unknown_id;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* There's no reason to deliver sample
|
|
* for zero period, bail out.
|
|
*/
|
|
if (!sample->period)
|
|
return 0;
|
|
|
|
evsel = container_of(sid->evsel, struct evsel, core);
|
|
return tool->sample(tool, event, sample, evsel, machine);
|
|
}
|
|
|
|
static int deliver_sample_group(struct evlist *evlist,
|
|
struct perf_tool *tool,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct machine *machine)
|
|
{
|
|
int ret = -EINVAL;
|
|
u64 i;
|
|
|
|
for (i = 0; i < sample->read.group.nr; i++) {
|
|
ret = deliver_sample_value(evlist, tool, event, sample,
|
|
&sample->read.group.values[i],
|
|
machine);
|
|
if (ret)
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
perf_evlist__deliver_sample(struct evlist *evlist,
|
|
struct perf_tool *tool,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct evsel *evsel,
|
|
struct machine *machine)
|
|
{
|
|
/* We know evsel != NULL. */
|
|
u64 sample_type = evsel->core.attr.sample_type;
|
|
u64 read_format = evsel->core.attr.read_format;
|
|
|
|
/* Standard sample delivery. */
|
|
if (!(sample_type & PERF_SAMPLE_READ))
|
|
return tool->sample(tool, event, sample, evsel, machine);
|
|
|
|
/* For PERF_SAMPLE_READ we have either single or group mode. */
|
|
if (read_format & PERF_FORMAT_GROUP)
|
|
return deliver_sample_group(evlist, tool, event, sample,
|
|
machine);
|
|
else
|
|
return deliver_sample_value(evlist, tool, event, sample,
|
|
&sample->read.one, machine);
|
|
}
|
|
|
|
static int machines__deliver_event(struct machines *machines,
|
|
struct evlist *evlist,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct perf_tool *tool, u64 file_offset)
|
|
{
|
|
struct evsel *evsel;
|
|
struct machine *machine;
|
|
|
|
dump_event(evlist, event, file_offset, sample);
|
|
|
|
evsel = perf_evlist__id2evsel(evlist, sample->id);
|
|
|
|
machine = machines__find_for_cpumode(machines, event, sample);
|
|
|
|
switch (event->header.type) {
|
|
case PERF_RECORD_SAMPLE:
|
|
if (evsel == NULL) {
|
|
++evlist->stats.nr_unknown_id;
|
|
return 0;
|
|
}
|
|
dump_sample(evsel, event, sample);
|
|
if (machine == NULL) {
|
|
++evlist->stats.nr_unprocessable_samples;
|
|
return 0;
|
|
}
|
|
return perf_evlist__deliver_sample(evlist, tool, event, sample, evsel, machine);
|
|
case PERF_RECORD_MMAP:
|
|
return tool->mmap(tool, event, sample, machine);
|
|
case PERF_RECORD_MMAP2:
|
|
if (event->header.misc & PERF_RECORD_MISC_PROC_MAP_PARSE_TIMEOUT)
|
|
++evlist->stats.nr_proc_map_timeout;
|
|
return tool->mmap2(tool, event, sample, machine);
|
|
case PERF_RECORD_COMM:
|
|
return tool->comm(tool, event, sample, machine);
|
|
case PERF_RECORD_NAMESPACES:
|
|
return tool->namespaces(tool, event, sample, machine);
|
|
case PERF_RECORD_FORK:
|
|
return tool->fork(tool, event, sample, machine);
|
|
case PERF_RECORD_EXIT:
|
|
return tool->exit(tool, event, sample, machine);
|
|
case PERF_RECORD_LOST:
|
|
if (tool->lost == perf_event__process_lost)
|
|
evlist->stats.total_lost += event->lost.lost;
|
|
return tool->lost(tool, event, sample, machine);
|
|
case PERF_RECORD_LOST_SAMPLES:
|
|
if (tool->lost_samples == perf_event__process_lost_samples)
|
|
evlist->stats.total_lost_samples += event->lost_samples.lost;
|
|
return tool->lost_samples(tool, event, sample, machine);
|
|
case PERF_RECORD_READ:
|
|
dump_read(evsel, event);
|
|
return tool->read(tool, event, sample, evsel, machine);
|
|
case PERF_RECORD_THROTTLE:
|
|
return tool->throttle(tool, event, sample, machine);
|
|
case PERF_RECORD_UNTHROTTLE:
|
|
return tool->unthrottle(tool, event, sample, machine);
|
|
case PERF_RECORD_AUX:
|
|
if (tool->aux == perf_event__process_aux) {
|
|
if (event->aux.flags & PERF_AUX_FLAG_TRUNCATED)
|
|
evlist->stats.total_aux_lost += 1;
|
|
if (event->aux.flags & PERF_AUX_FLAG_PARTIAL)
|
|
evlist->stats.total_aux_partial += 1;
|
|
}
|
|
return tool->aux(tool, event, sample, machine);
|
|
case PERF_RECORD_ITRACE_START:
|
|
return tool->itrace_start(tool, event, sample, machine);
|
|
case PERF_RECORD_SWITCH:
|
|
case PERF_RECORD_SWITCH_CPU_WIDE:
|
|
return tool->context_switch(tool, event, sample, machine);
|
|
case PERF_RECORD_KSYMBOL:
|
|
return tool->ksymbol(tool, event, sample, machine);
|
|
case PERF_RECORD_BPF_EVENT:
|
|
return tool->bpf(tool, event, sample, machine);
|
|
default:
|
|
++evlist->stats.nr_unknown_events;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static int perf_session__deliver_event(struct perf_session *session,
|
|
union perf_event *event,
|
|
struct perf_tool *tool,
|
|
u64 file_offset)
|
|
{
|
|
struct perf_sample sample;
|
|
int ret;
|
|
|
|
ret = perf_evlist__parse_sample(session->evlist, event, &sample);
|
|
if (ret) {
|
|
pr_err("Can't parse sample, err = %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = auxtrace__process_event(session, event, &sample, tool);
|
|
if (ret < 0)
|
|
return ret;
|
|
if (ret > 0)
|
|
return 0;
|
|
|
|
return machines__deliver_event(&session->machines, session->evlist,
|
|
event, &sample, tool, file_offset);
|
|
}
|
|
|
|
static s64 perf_session__process_user_event(struct perf_session *session,
|
|
union perf_event *event,
|
|
u64 file_offset)
|
|
{
|
|
struct ordered_events *oe = &session->ordered_events;
|
|
struct perf_tool *tool = session->tool;
|
|
struct perf_sample sample = { .time = 0, };
|
|
int fd = perf_data__fd(session->data);
|
|
int err;
|
|
|
|
if (event->header.type != PERF_RECORD_COMPRESSED ||
|
|
tool->compressed == perf_session__process_compressed_event_stub)
|
|
dump_event(session->evlist, event, file_offset, &sample);
|
|
|
|
/* These events are processed right away */
|
|
switch (event->header.type) {
|
|
case PERF_RECORD_HEADER_ATTR:
|
|
err = tool->attr(tool, event, &session->evlist);
|
|
if (err == 0) {
|
|
perf_session__set_id_hdr_size(session);
|
|
perf_session__set_comm_exec(session);
|
|
}
|
|
return err;
|
|
case PERF_RECORD_EVENT_UPDATE:
|
|
return tool->event_update(tool, event, &session->evlist);
|
|
case PERF_RECORD_HEADER_EVENT_TYPE:
|
|
/*
|
|
* Depreceated, but we need to handle it for sake
|
|
* of old data files create in pipe mode.
|
|
*/
|
|
return 0;
|
|
case PERF_RECORD_HEADER_TRACING_DATA:
|
|
/* setup for reading amidst mmap */
|
|
lseek(fd, file_offset, SEEK_SET);
|
|
return tool->tracing_data(session, event);
|
|
case PERF_RECORD_HEADER_BUILD_ID:
|
|
return tool->build_id(session, event);
|
|
case PERF_RECORD_FINISHED_ROUND:
|
|
return tool->finished_round(tool, event, oe);
|
|
case PERF_RECORD_ID_INDEX:
|
|
return tool->id_index(session, event);
|
|
case PERF_RECORD_AUXTRACE_INFO:
|
|
return tool->auxtrace_info(session, event);
|
|
case PERF_RECORD_AUXTRACE:
|
|
/* setup for reading amidst mmap */
|
|
lseek(fd, file_offset + event->header.size, SEEK_SET);
|
|
return tool->auxtrace(session, event);
|
|
case PERF_RECORD_AUXTRACE_ERROR:
|
|
perf_session__auxtrace_error_inc(session, event);
|
|
return tool->auxtrace_error(session, event);
|
|
case PERF_RECORD_THREAD_MAP:
|
|
return tool->thread_map(session, event);
|
|
case PERF_RECORD_CPU_MAP:
|
|
return tool->cpu_map(session, event);
|
|
case PERF_RECORD_STAT_CONFIG:
|
|
return tool->stat_config(session, event);
|
|
case PERF_RECORD_STAT:
|
|
return tool->stat(session, event);
|
|
case PERF_RECORD_STAT_ROUND:
|
|
return tool->stat_round(session, event);
|
|
case PERF_RECORD_TIME_CONV:
|
|
session->time_conv = event->time_conv;
|
|
return tool->time_conv(session, event);
|
|
case PERF_RECORD_HEADER_FEATURE:
|
|
return tool->feature(session, event);
|
|
case PERF_RECORD_COMPRESSED:
|
|
err = tool->compressed(session, event, file_offset);
|
|
if (err)
|
|
dump_event(session->evlist, event, file_offset, &sample);
|
|
return err;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
int perf_session__deliver_synth_event(struct perf_session *session,
|
|
union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
struct evlist *evlist = session->evlist;
|
|
struct perf_tool *tool = session->tool;
|
|
|
|
events_stats__inc(&evlist->stats, event->header.type);
|
|
|
|
if (event->header.type >= PERF_RECORD_USER_TYPE_START)
|
|
return perf_session__process_user_event(session, event, 0);
|
|
|
|
return machines__deliver_event(&session->machines, evlist, event, sample, tool, 0);
|
|
}
|
|
|
|
static void event_swap(union perf_event *event, bool sample_id_all)
|
|
{
|
|
perf_event__swap_op swap;
|
|
|
|
swap = perf_event__swap_ops[event->header.type];
|
|
if (swap)
|
|
swap(event, sample_id_all);
|
|
}
|
|
|
|
int perf_session__peek_event(struct perf_session *session, off_t file_offset,
|
|
void *buf, size_t buf_sz,
|
|
union perf_event **event_ptr,
|
|
struct perf_sample *sample)
|
|
{
|
|
union perf_event *event;
|
|
size_t hdr_sz, rest;
|
|
int fd;
|
|
|
|
if (session->one_mmap && !session->header.needs_swap) {
|
|
event = file_offset - session->one_mmap_offset +
|
|
session->one_mmap_addr;
|
|
goto out_parse_sample;
|
|
}
|
|
|
|
if (perf_data__is_pipe(session->data))
|
|
return -1;
|
|
|
|
fd = perf_data__fd(session->data);
|
|
hdr_sz = sizeof(struct perf_event_header);
|
|
|
|
if (buf_sz < hdr_sz)
|
|
return -1;
|
|
|
|
if (lseek(fd, file_offset, SEEK_SET) == (off_t)-1 ||
|
|
readn(fd, buf, hdr_sz) != (ssize_t)hdr_sz)
|
|
return -1;
|
|
|
|
event = (union perf_event *)buf;
|
|
|
|
if (session->header.needs_swap)
|
|
perf_event_header__bswap(&event->header);
|
|
|
|
if (event->header.size < hdr_sz || event->header.size > buf_sz)
|
|
return -1;
|
|
|
|
rest = event->header.size - hdr_sz;
|
|
|
|
if (readn(fd, buf, rest) != (ssize_t)rest)
|
|
return -1;
|
|
|
|
if (session->header.needs_swap)
|
|
event_swap(event, perf_evlist__sample_id_all(session->evlist));
|
|
|
|
out_parse_sample:
|
|
|
|
if (sample && event->header.type < PERF_RECORD_USER_TYPE_START &&
|
|
perf_evlist__parse_sample(session->evlist, event, sample))
|
|
return -1;
|
|
|
|
*event_ptr = event;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static s64 perf_session__process_event(struct perf_session *session,
|
|
union perf_event *event, u64 file_offset)
|
|
{
|
|
struct evlist *evlist = session->evlist;
|
|
struct perf_tool *tool = session->tool;
|
|
int ret;
|
|
|
|
if (session->header.needs_swap)
|
|
event_swap(event, perf_evlist__sample_id_all(evlist));
|
|
|
|
if (event->header.type >= PERF_RECORD_HEADER_MAX)
|
|
return -EINVAL;
|
|
|
|
events_stats__inc(&evlist->stats, event->header.type);
|
|
|
|
if (event->header.type >= PERF_RECORD_USER_TYPE_START)
|
|
return perf_session__process_user_event(session, event, file_offset);
|
|
|
|
if (tool->ordered_events) {
|
|
u64 timestamp = -1ULL;
|
|
|
|
ret = perf_evlist__parse_sample_timestamp(evlist, event, ×tamp);
|
|
if (ret && ret != -1)
|
|
return ret;
|
|
|
|
ret = perf_session__queue_event(session, event, timestamp, file_offset);
|
|
if (ret != -ETIME)
|
|
return ret;
|
|
}
|
|
|
|
return perf_session__deliver_event(session, event, tool, file_offset);
|
|
}
|
|
|
|
void perf_event_header__bswap(struct perf_event_header *hdr)
|
|
{
|
|
hdr->type = bswap_32(hdr->type);
|
|
hdr->misc = bswap_16(hdr->misc);
|
|
hdr->size = bswap_16(hdr->size);
|
|
}
|
|
|
|
struct thread *perf_session__findnew(struct perf_session *session, pid_t pid)
|
|
{
|
|
return machine__findnew_thread(&session->machines.host, -1, pid);
|
|
}
|
|
|
|
/*
|
|
* Threads are identified by pid and tid, and the idle task has pid == tid == 0.
|
|
* So here a single thread is created for that, but actually there is a separate
|
|
* idle task per cpu, so there should be one 'struct thread' per cpu, but there
|
|
* is only 1. That causes problems for some tools, requiring workarounds. For
|
|
* example get_idle_thread() in builtin-sched.c, or thread_stack__per_cpu().
|
|
*/
|
|
int perf_session__register_idle_thread(struct perf_session *session)
|
|
{
|
|
struct thread *thread;
|
|
int err = 0;
|
|
|
|
thread = machine__findnew_thread(&session->machines.host, 0, 0);
|
|
if (thread == NULL || thread__set_comm(thread, "swapper", 0)) {
|
|
pr_err("problem inserting idle task.\n");
|
|
err = -1;
|
|
}
|
|
|
|
if (thread == NULL || thread__set_namespaces(thread, 0, NULL)) {
|
|
pr_err("problem inserting idle task.\n");
|
|
err = -1;
|
|
}
|
|
|
|
/* machine__findnew_thread() got the thread, so put it */
|
|
thread__put(thread);
|
|
return err;
|
|
}
|
|
|
|
static void
|
|
perf_session__warn_order(const struct perf_session *session)
|
|
{
|
|
const struct ordered_events *oe = &session->ordered_events;
|
|
struct evsel *evsel;
|
|
bool should_warn = true;
|
|
|
|
evlist__for_each_entry(session->evlist, evsel) {
|
|
if (evsel->core.attr.write_backward)
|
|
should_warn = false;
|
|
}
|
|
|
|
if (!should_warn)
|
|
return;
|
|
if (oe->nr_unordered_events != 0)
|
|
ui__warning("%u out of order events recorded.\n", oe->nr_unordered_events);
|
|
}
|
|
|
|
static void perf_session__warn_about_errors(const struct perf_session *session)
|
|
{
|
|
const struct events_stats *stats = &session->evlist->stats;
|
|
|
|
if (session->tool->lost == perf_event__process_lost &&
|
|
stats->nr_events[PERF_RECORD_LOST] != 0) {
|
|
ui__warning("Processed %d events and lost %d chunks!\n\n"
|
|
"Check IO/CPU overload!\n\n",
|
|
stats->nr_events[0],
|
|
stats->nr_events[PERF_RECORD_LOST]);
|
|
}
|
|
|
|
if (session->tool->lost_samples == perf_event__process_lost_samples) {
|
|
double drop_rate;
|
|
|
|
drop_rate = (double)stats->total_lost_samples /
|
|
(double) (stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples);
|
|
if (drop_rate > 0.05) {
|
|
ui__warning("Processed %" PRIu64 " samples and lost %3.2f%%!\n\n",
|
|
stats->nr_events[PERF_RECORD_SAMPLE] + stats->total_lost_samples,
|
|
drop_rate * 100.0);
|
|
}
|
|
}
|
|
|
|
if (session->tool->aux == perf_event__process_aux &&
|
|
stats->total_aux_lost != 0) {
|
|
ui__warning("AUX data lost %" PRIu64 " times out of %u!\n\n",
|
|
stats->total_aux_lost,
|
|
stats->nr_events[PERF_RECORD_AUX]);
|
|
}
|
|
|
|
if (session->tool->aux == perf_event__process_aux &&
|
|
stats->total_aux_partial != 0) {
|
|
bool vmm_exclusive = false;
|
|
|
|
(void)sysfs__read_bool("module/kvm_intel/parameters/vmm_exclusive",
|
|
&vmm_exclusive);
|
|
|
|
ui__warning("AUX data had gaps in it %" PRIu64 " times out of %u!\n\n"
|
|
"Are you running a KVM guest in the background?%s\n\n",
|
|
stats->total_aux_partial,
|
|
stats->nr_events[PERF_RECORD_AUX],
|
|
vmm_exclusive ?
|
|
"\nReloading kvm_intel module with vmm_exclusive=0\n"
|
|
"will reduce the gaps to only guest's timeslices." :
|
|
"");
|
|
}
|
|
|
|
if (stats->nr_unknown_events != 0) {
|
|
ui__warning("Found %u unknown events!\n\n"
|
|
"Is this an older tool processing a perf.data "
|
|
"file generated by a more recent tool?\n\n"
|
|
"If that is not the case, consider "
|
|
"reporting to linux-kernel@vger.kernel.org.\n\n",
|
|
stats->nr_unknown_events);
|
|
}
|
|
|
|
if (stats->nr_unknown_id != 0) {
|
|
ui__warning("%u samples with id not present in the header\n",
|
|
stats->nr_unknown_id);
|
|
}
|
|
|
|
if (stats->nr_invalid_chains != 0) {
|
|
ui__warning("Found invalid callchains!\n\n"
|
|
"%u out of %u events were discarded for this reason.\n\n"
|
|
"Consider reporting to linux-kernel@vger.kernel.org.\n\n",
|
|
stats->nr_invalid_chains,
|
|
stats->nr_events[PERF_RECORD_SAMPLE]);
|
|
}
|
|
|
|
if (stats->nr_unprocessable_samples != 0) {
|
|
ui__warning("%u unprocessable samples recorded.\n"
|
|
"Do you have a KVM guest running and not using 'perf kvm'?\n",
|
|
stats->nr_unprocessable_samples);
|
|
}
|
|
|
|
perf_session__warn_order(session);
|
|
|
|
events_stats__auxtrace_error_warn(stats);
|
|
|
|
if (stats->nr_proc_map_timeout != 0) {
|
|
ui__warning("%d map information files for pre-existing threads were\n"
|
|
"not processed, if there are samples for addresses they\n"
|
|
"will not be resolved, you may find out which are these\n"
|
|
"threads by running with -v and redirecting the output\n"
|
|
"to a file.\n"
|
|
"The time limit to process proc map is too short?\n"
|
|
"Increase it by --proc-map-timeout\n",
|
|
stats->nr_proc_map_timeout);
|
|
}
|
|
}
|
|
|
|
static int perf_session__flush_thread_stack(struct thread *thread,
|
|
void *p __maybe_unused)
|
|
{
|
|
return thread_stack__flush(thread);
|
|
}
|
|
|
|
static int perf_session__flush_thread_stacks(struct perf_session *session)
|
|
{
|
|
return machines__for_each_thread(&session->machines,
|
|
perf_session__flush_thread_stack,
|
|
NULL);
|
|
}
|
|
|
|
volatile int session_done;
|
|
|
|
static int __perf_session__process_decomp_events(struct perf_session *session);
|
|
|
|
static int __perf_session__process_pipe_events(struct perf_session *session)
|
|
{
|
|
struct ordered_events *oe = &session->ordered_events;
|
|
struct perf_tool *tool = session->tool;
|
|
int fd = perf_data__fd(session->data);
|
|
union perf_event *event;
|
|
uint32_t size, cur_size = 0;
|
|
void *buf = NULL;
|
|
s64 skip = 0;
|
|
u64 head;
|
|
ssize_t err;
|
|
void *p;
|
|
|
|
perf_tool__fill_defaults(tool);
|
|
|
|
head = 0;
|
|
cur_size = sizeof(union perf_event);
|
|
|
|
buf = malloc(cur_size);
|
|
if (!buf)
|
|
return -errno;
|
|
ordered_events__set_copy_on_queue(oe, true);
|
|
more:
|
|
event = buf;
|
|
err = readn(fd, event, sizeof(struct perf_event_header));
|
|
if (err <= 0) {
|
|
if (err == 0)
|
|
goto done;
|
|
|
|
pr_err("failed to read event header\n");
|
|
goto out_err;
|
|
}
|
|
|
|
if (session->header.needs_swap)
|
|
perf_event_header__bswap(&event->header);
|
|
|
|
size = event->header.size;
|
|
if (size < sizeof(struct perf_event_header)) {
|
|
pr_err("bad event header size\n");
|
|
goto out_err;
|
|
}
|
|
|
|
if (size > cur_size) {
|
|
void *new = realloc(buf, size);
|
|
if (!new) {
|
|
pr_err("failed to allocate memory to read event\n");
|
|
goto out_err;
|
|
}
|
|
buf = new;
|
|
cur_size = size;
|
|
event = buf;
|
|
}
|
|
p = event;
|
|
p += sizeof(struct perf_event_header);
|
|
|
|
if (size - sizeof(struct perf_event_header)) {
|
|
err = readn(fd, p, size - sizeof(struct perf_event_header));
|
|
if (err <= 0) {
|
|
if (err == 0) {
|
|
pr_err("unexpected end of event stream\n");
|
|
goto done;
|
|
}
|
|
|
|
pr_err("failed to read event data\n");
|
|
goto out_err;
|
|
}
|
|
}
|
|
|
|
if ((skip = perf_session__process_event(session, event, head)) < 0) {
|
|
pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
|
|
head, event->header.size, event->header.type);
|
|
err = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
head += size;
|
|
|
|
if (skip > 0)
|
|
head += skip;
|
|
|
|
err = __perf_session__process_decomp_events(session);
|
|
if (err)
|
|
goto out_err;
|
|
|
|
if (!session_done())
|
|
goto more;
|
|
done:
|
|
/* do the final flush for ordered samples */
|
|
err = ordered_events__flush(oe, OE_FLUSH__FINAL);
|
|
if (err)
|
|
goto out_err;
|
|
err = auxtrace__flush_events(session, tool);
|
|
if (err)
|
|
goto out_err;
|
|
err = perf_session__flush_thread_stacks(session);
|
|
out_err:
|
|
free(buf);
|
|
if (!tool->no_warn)
|
|
perf_session__warn_about_errors(session);
|
|
ordered_events__free(&session->ordered_events);
|
|
auxtrace__free_events(session);
|
|
return err;
|
|
}
|
|
|
|
static union perf_event *
|
|
fetch_mmaped_event(struct perf_session *session,
|
|
u64 head, size_t mmap_size, char *buf)
|
|
{
|
|
union perf_event *event;
|
|
|
|
/*
|
|
* Ensure we have enough space remaining to read
|
|
* the size of the event in the headers.
|
|
*/
|
|
if (head + sizeof(event->header) > mmap_size)
|
|
return NULL;
|
|
|
|
event = (union perf_event *)(buf + head);
|
|
|
|
if (session->header.needs_swap)
|
|
perf_event_header__bswap(&event->header);
|
|
|
|
if (head + event->header.size > mmap_size) {
|
|
/* We're not fetching the event so swap back again */
|
|
if (session->header.needs_swap)
|
|
perf_event_header__bswap(&event->header);
|
|
pr_debug("%s: head=%#" PRIx64 " event->header_size=%#x, mmap_size=%#zx: fuzzed perf.data?\n",
|
|
__func__, head, event->header.size, mmap_size);
|
|
return ERR_PTR(-EINVAL);
|
|
}
|
|
|
|
return event;
|
|
}
|
|
|
|
static int __perf_session__process_decomp_events(struct perf_session *session)
|
|
{
|
|
s64 skip;
|
|
u64 size, file_pos = 0;
|
|
struct decomp *decomp = session->decomp_last;
|
|
|
|
if (!decomp)
|
|
return 0;
|
|
|
|
while (decomp->head < decomp->size && !session_done()) {
|
|
union perf_event *event = fetch_mmaped_event(session, decomp->head, decomp->size, decomp->data);
|
|
|
|
if (IS_ERR(event))
|
|
return PTR_ERR(event);
|
|
|
|
if (!event)
|
|
break;
|
|
|
|
size = event->header.size;
|
|
|
|
if (size < sizeof(struct perf_event_header) ||
|
|
(skip = perf_session__process_event(session, event, file_pos)) < 0) {
|
|
pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
|
|
decomp->file_pos + decomp->head, event->header.size, event->header.type);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (skip)
|
|
size += skip;
|
|
|
|
decomp->head += size;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* On 64bit we can mmap the data file in one go. No need for tiny mmap
|
|
* slices. On 32bit we use 32MB.
|
|
*/
|
|
#if BITS_PER_LONG == 64
|
|
#define MMAP_SIZE ULLONG_MAX
|
|
#define NUM_MMAPS 1
|
|
#else
|
|
#define MMAP_SIZE (32 * 1024 * 1024ULL)
|
|
#define NUM_MMAPS 128
|
|
#endif
|
|
|
|
struct reader;
|
|
|
|
typedef s64 (*reader_cb_t)(struct perf_session *session,
|
|
union perf_event *event,
|
|
u64 file_offset);
|
|
|
|
struct reader {
|
|
int fd;
|
|
u64 data_size;
|
|
u64 data_offset;
|
|
reader_cb_t process;
|
|
};
|
|
|
|
static int
|
|
reader__process_events(struct reader *rd, struct perf_session *session,
|
|
struct ui_progress *prog)
|
|
{
|
|
u64 data_size = rd->data_size;
|
|
u64 head, page_offset, file_offset, file_pos, size;
|
|
int err = 0, mmap_prot, mmap_flags, map_idx = 0;
|
|
size_t mmap_size;
|
|
char *buf, *mmaps[NUM_MMAPS];
|
|
union perf_event *event;
|
|
s64 skip;
|
|
|
|
page_offset = page_size * (rd->data_offset / page_size);
|
|
file_offset = page_offset;
|
|
head = rd->data_offset - page_offset;
|
|
|
|
ui_progress__init_size(prog, data_size, "Processing events...");
|
|
|
|
data_size += rd->data_offset;
|
|
|
|
mmap_size = MMAP_SIZE;
|
|
if (mmap_size > data_size) {
|
|
mmap_size = data_size;
|
|
session->one_mmap = true;
|
|
}
|
|
|
|
memset(mmaps, 0, sizeof(mmaps));
|
|
|
|
mmap_prot = PROT_READ;
|
|
mmap_flags = MAP_SHARED;
|
|
|
|
if (session->header.needs_swap) {
|
|
mmap_prot |= PROT_WRITE;
|
|
mmap_flags = MAP_PRIVATE;
|
|
}
|
|
remap:
|
|
buf = mmap(NULL, mmap_size, mmap_prot, mmap_flags, rd->fd,
|
|
file_offset);
|
|
if (buf == MAP_FAILED) {
|
|
pr_err("failed to mmap file\n");
|
|
err = -errno;
|
|
goto out;
|
|
}
|
|
mmaps[map_idx] = buf;
|
|
map_idx = (map_idx + 1) & (ARRAY_SIZE(mmaps) - 1);
|
|
file_pos = file_offset + head;
|
|
if (session->one_mmap) {
|
|
session->one_mmap_addr = buf;
|
|
session->one_mmap_offset = file_offset;
|
|
}
|
|
|
|
more:
|
|
event = fetch_mmaped_event(session, head, mmap_size, buf);
|
|
if (IS_ERR(event))
|
|
return PTR_ERR(event);
|
|
|
|
if (!event) {
|
|
if (mmaps[map_idx]) {
|
|
munmap(mmaps[map_idx], mmap_size);
|
|
mmaps[map_idx] = NULL;
|
|
}
|
|
|
|
page_offset = page_size * (head / page_size);
|
|
file_offset += page_offset;
|
|
head -= page_offset;
|
|
goto remap;
|
|
}
|
|
|
|
size = event->header.size;
|
|
|
|
skip = -EINVAL;
|
|
|
|
if (size < sizeof(struct perf_event_header) ||
|
|
(skip = rd->process(session, event, file_pos)) < 0) {
|
|
pr_err("%#" PRIx64 " [%#x]: failed to process type: %d [%s]\n",
|
|
file_offset + head, event->header.size,
|
|
event->header.type, strerror(-skip));
|
|
err = skip;
|
|
goto out;
|
|
}
|
|
|
|
if (skip)
|
|
size += skip;
|
|
|
|
head += size;
|
|
file_pos += size;
|
|
|
|
err = __perf_session__process_decomp_events(session);
|
|
if (err)
|
|
goto out;
|
|
|
|
ui_progress__update(prog, size);
|
|
|
|
if (session_done())
|
|
goto out;
|
|
|
|
if (file_pos < data_size)
|
|
goto more;
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static s64 process_simple(struct perf_session *session,
|
|
union perf_event *event,
|
|
u64 file_offset)
|
|
{
|
|
return perf_session__process_event(session, event, file_offset);
|
|
}
|
|
|
|
static int __perf_session__process_events(struct perf_session *session)
|
|
{
|
|
struct reader rd = {
|
|
.fd = perf_data__fd(session->data),
|
|
.data_size = session->header.data_size,
|
|
.data_offset = session->header.data_offset,
|
|
.process = process_simple,
|
|
};
|
|
struct ordered_events *oe = &session->ordered_events;
|
|
struct perf_tool *tool = session->tool;
|
|
struct ui_progress prog;
|
|
int err;
|
|
|
|
perf_tool__fill_defaults(tool);
|
|
|
|
if (rd.data_size == 0)
|
|
return -1;
|
|
|
|
ui_progress__init_size(&prog, rd.data_size, "Processing events...");
|
|
|
|
err = reader__process_events(&rd, session, &prog);
|
|
if (err)
|
|
goto out_err;
|
|
/* do the final flush for ordered samples */
|
|
err = ordered_events__flush(oe, OE_FLUSH__FINAL);
|
|
if (err)
|
|
goto out_err;
|
|
err = auxtrace__flush_events(session, tool);
|
|
if (err)
|
|
goto out_err;
|
|
err = perf_session__flush_thread_stacks(session);
|
|
out_err:
|
|
ui_progress__finish();
|
|
if (!tool->no_warn)
|
|
perf_session__warn_about_errors(session);
|
|
/*
|
|
* We may switching perf.data output, make ordered_events
|
|
* reusable.
|
|
*/
|
|
ordered_events__reinit(&session->ordered_events);
|
|
auxtrace__free_events(session);
|
|
session->one_mmap = false;
|
|
return err;
|
|
}
|
|
|
|
int perf_session__process_events(struct perf_session *session)
|
|
{
|
|
if (perf_session__register_idle_thread(session) < 0)
|
|
return -ENOMEM;
|
|
|
|
if (perf_data__is_pipe(session->data))
|
|
return __perf_session__process_pipe_events(session);
|
|
|
|
return __perf_session__process_events(session);
|
|
}
|
|
|
|
bool perf_session__has_traces(struct perf_session *session, const char *msg)
|
|
{
|
|
struct evsel *evsel;
|
|
|
|
evlist__for_each_entry(session->evlist, evsel) {
|
|
if (evsel->core.attr.type == PERF_TYPE_TRACEPOINT)
|
|
return true;
|
|
}
|
|
|
|
pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
|
|
return false;
|
|
}
|
|
|
|
int map__set_kallsyms_ref_reloc_sym(struct map *map, const char *symbol_name, u64 addr)
|
|
{
|
|
char *bracket;
|
|
struct ref_reloc_sym *ref;
|
|
struct kmap *kmap;
|
|
|
|
ref = zalloc(sizeof(struct ref_reloc_sym));
|
|
if (ref == NULL)
|
|
return -ENOMEM;
|
|
|
|
ref->name = strdup(symbol_name);
|
|
if (ref->name == NULL) {
|
|
free(ref);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
bracket = strchr(ref->name, ']');
|
|
if (bracket)
|
|
*bracket = '\0';
|
|
|
|
ref->addr = addr;
|
|
|
|
kmap = map__kmap(map);
|
|
if (kmap)
|
|
kmap->ref_reloc_sym = ref;
|
|
|
|
return 0;
|
|
}
|
|
|
|
size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp)
|
|
{
|
|
return machines__fprintf_dsos(&session->machines, fp);
|
|
}
|
|
|
|
size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
|
|
bool (skip)(struct dso *dso, int parm), int parm)
|
|
{
|
|
return machines__fprintf_dsos_buildid(&session->machines, fp, skip, parm);
|
|
}
|
|
|
|
size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp)
|
|
{
|
|
size_t ret;
|
|
const char *msg = "";
|
|
|
|
if (perf_header__has_feat(&session->header, HEADER_AUXTRACE))
|
|
msg = " (excludes AUX area (e.g. instruction trace) decoded / synthesized events)";
|
|
|
|
ret = fprintf(fp, "\nAggregated stats:%s\n", msg);
|
|
|
|
ret += events_stats__fprintf(&session->evlist->stats, fp);
|
|
return ret;
|
|
}
|
|
|
|
size_t perf_session__fprintf(struct perf_session *session, FILE *fp)
|
|
{
|
|
/*
|
|
* FIXME: Here we have to actually print all the machines in this
|
|
* session, not just the host...
|
|
*/
|
|
return machine__fprintf(&session->machines.host, fp);
|
|
}
|
|
|
|
struct evsel *perf_session__find_first_evtype(struct perf_session *session,
|
|
unsigned int type)
|
|
{
|
|
struct evsel *pos;
|
|
|
|
evlist__for_each_entry(session->evlist, pos) {
|
|
if (pos->core.attr.type == type)
|
|
return pos;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
int perf_session__cpu_bitmap(struct perf_session *session,
|
|
const char *cpu_list, unsigned long *cpu_bitmap)
|
|
{
|
|
int i, err = -1;
|
|
struct perf_cpu_map *map;
|
|
int nr_cpus = min(session->header.env.nr_cpus_online, MAX_NR_CPUS);
|
|
|
|
for (i = 0; i < PERF_TYPE_MAX; ++i) {
|
|
struct evsel *evsel;
|
|
|
|
evsel = perf_session__find_first_evtype(session, i);
|
|
if (!evsel)
|
|
continue;
|
|
|
|
if (!(evsel->core.attr.sample_type & PERF_SAMPLE_CPU)) {
|
|
pr_err("File does not contain CPU events. "
|
|
"Remove -C option to proceed.\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
map = perf_cpu_map__new(cpu_list);
|
|
if (map == NULL) {
|
|
pr_err("Invalid cpu_list\n");
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < map->nr; i++) {
|
|
int cpu = map->map[i];
|
|
|
|
if (cpu >= nr_cpus) {
|
|
pr_err("Requested CPU %d too large. "
|
|
"Consider raising MAX_NR_CPUS\n", cpu);
|
|
goto out_delete_map;
|
|
}
|
|
|
|
set_bit(cpu, cpu_bitmap);
|
|
}
|
|
|
|
err = 0;
|
|
|
|
out_delete_map:
|
|
perf_cpu_map__put(map);
|
|
return err;
|
|
}
|
|
|
|
void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
|
|
bool full)
|
|
{
|
|
if (session == NULL || fp == NULL)
|
|
return;
|
|
|
|
fprintf(fp, "# ========\n");
|
|
perf_header__fprintf_info(session, fp, full);
|
|
fprintf(fp, "# ========\n#\n");
|
|
}
|
|
|
|
int perf_event__process_id_index(struct perf_session *session,
|
|
union perf_event *event)
|
|
{
|
|
struct evlist *evlist = session->evlist;
|
|
struct perf_record_id_index *ie = &event->id_index;
|
|
size_t i, nr, max_nr;
|
|
|
|
max_nr = (ie->header.size - sizeof(struct perf_record_id_index)) /
|
|
sizeof(struct id_index_entry);
|
|
nr = ie->nr;
|
|
if (nr > max_nr)
|
|
return -EINVAL;
|
|
|
|
if (dump_trace)
|
|
fprintf(stdout, " nr: %zu\n", nr);
|
|
|
|
for (i = 0; i < nr; i++) {
|
|
struct id_index_entry *e = &ie->entries[i];
|
|
struct perf_sample_id *sid;
|
|
|
|
if (dump_trace) {
|
|
fprintf(stdout, " ... id: %"PRI_lu64, e->id);
|
|
fprintf(stdout, " idx: %"PRI_lu64, e->idx);
|
|
fprintf(stdout, " cpu: %"PRI_ld64, e->cpu);
|
|
fprintf(stdout, " tid: %"PRI_ld64"\n", e->tid);
|
|
}
|
|
|
|
sid = perf_evlist__id2sid(evlist, e->id);
|
|
if (!sid)
|
|
return -ENOENT;
|
|
sid->idx = e->idx;
|
|
sid->cpu = e->cpu;
|
|
sid->tid = e->tid;
|
|
}
|
|
return 0;
|
|
}
|