![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
For use by tools that are not perf.data based, as maybe 'perf trace' in live mode. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Borislav Petkov <bp@suse.de> Cc: David Ahern <dsahern@gmail.com> Cc: Don Zickus <dzickus@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/n/tip-nedqe7cmii5w82etfi36urfz@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
1823 lines
46 KiB
C
1823 lines
46 KiB
C
#include <linux/kernel.h>
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#include <traceevent/event-parse.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 "evlist.h"
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#include "evsel.h"
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#include "session.h"
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#include "tool.h"
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#include "sort.h"
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#include "util.h"
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#include "cpumap.h"
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#include "perf_regs.h"
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#include "asm/bug.h"
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static int perf_session__open(struct perf_session *session)
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{
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struct perf_data_file *file = session->file;
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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)");
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return -1;
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}
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if (perf_data_file__is_pipe(file))
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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");
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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");
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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");
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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 perf_evsel *evsel;
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evlist__for_each(session->evlist, evsel) {
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if (evsel->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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struct perf_session *perf_session__new(struct perf_data_file *file,
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bool repipe, struct perf_tool *tool)
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{
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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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ordered_events__init(&session->ordered_events);
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machines__init(&session->machines);
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if (file) {
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if (perf_data_file__open(file))
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goto out_delete;
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session->file = file;
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if (perf_data_file__is_read(file)) {
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if (perf_session__open(session) < 0)
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goto out_close;
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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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}
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if (!file || perf_data_file__is_write(file)) {
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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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if (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_close:
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perf_data_file__close(file);
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out_delete:
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perf_session__delete(session);
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out:
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return NULL;
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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_env__delete(struct perf_session_env *env)
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{
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zfree(&env->hostname);
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zfree(&env->os_release);
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zfree(&env->version);
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zfree(&env->arch);
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zfree(&env->cpu_desc);
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zfree(&env->cpuid);
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zfree(&env->cmdline);
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zfree(&env->sibling_cores);
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zfree(&env->sibling_threads);
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zfree(&env->numa_nodes);
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zfree(&env->pmu_mappings);
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}
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void perf_session__delete(struct perf_session *session)
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{
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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_env__delete(&session->header.env);
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machines__exit(&session->machines);
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if (session->file)
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perf_data_file__close(session->file);
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free(session);
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}
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static int process_event_synth_tracing_data_stub(struct perf_tool *tool
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__maybe_unused,
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union perf_event *event
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__maybe_unused,
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struct perf_session *session
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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 perf_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_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 perf_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 perf_session *perf_session
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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_finished_round(struct perf_tool *tool,
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union perf_event *event,
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struct perf_session *session);
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static int process_id_index_stub(struct perf_tool *tool __maybe_unused,
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union perf_event *event __maybe_unused,
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struct perf_session *perf_session
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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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void perf_tool__fill_defaults(struct perf_tool *tool)
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{
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if (tool->sample == NULL)
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tool->sample = process_event_sample_stub;
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if (tool->mmap == NULL)
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tool->mmap = process_event_stub;
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if (tool->mmap2 == NULL)
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tool->mmap2 = process_event_stub;
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if (tool->comm == NULL)
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tool->comm = process_event_stub;
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if (tool->fork == NULL)
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tool->fork = process_event_stub;
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if (tool->exit == NULL)
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tool->exit = process_event_stub;
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if (tool->lost == NULL)
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tool->lost = perf_event__process_lost;
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if (tool->read == NULL)
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tool->read = process_event_sample_stub;
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if (tool->throttle == NULL)
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tool->throttle = process_event_stub;
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if (tool->unthrottle == NULL)
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tool->unthrottle = process_event_stub;
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if (tool->attr == NULL)
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tool->attr = process_event_synth_attr_stub;
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if (tool->tracing_data == NULL)
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tool->tracing_data = process_event_synth_tracing_data_stub;
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if (tool->build_id == NULL)
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tool->build_id = process_finished_round_stub;
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if (tool->finished_round == NULL) {
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if (tool->ordered_events)
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tool->finished_round = process_finished_round;
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else
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tool->finished_round = process_finished_round_stub;
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}
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if (tool->id_index == NULL)
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tool->id_index = process_id_index_stub;
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}
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static void swap_sample_id_all(union perf_event *event, void *data)
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{
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void *end = (void *) event + event->header.size;
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int size = end - data;
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BUG_ON(size % sizeof(u64));
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mem_bswap_64(data, size);
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}
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static void perf_event__all64_swap(union perf_event *event,
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bool sample_id_all __maybe_unused)
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{
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struct perf_event_header *hdr = &event->header;
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mem_bswap_64(hdr + 1, event->header.size - sizeof(*hdr));
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}
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static void perf_event__comm_swap(union perf_event *event, bool sample_id_all)
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{
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event->comm.pid = bswap_32(event->comm.pid);
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event->comm.tid = bswap_32(event->comm.tid);
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if (sample_id_all) {
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void *data = &event->comm.comm;
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data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
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swap_sample_id_all(event, data);
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}
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}
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static void perf_event__mmap_swap(union perf_event *event,
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bool sample_id_all)
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{
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event->mmap.pid = bswap_32(event->mmap.pid);
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event->mmap.tid = bswap_32(event->mmap.tid);
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event->mmap.start = bswap_64(event->mmap.start);
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event->mmap.len = bswap_64(event->mmap.len);
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event->mmap.pgoff = bswap_64(event->mmap.pgoff);
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if (sample_id_all) {
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void *data = &event->mmap.filename;
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data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
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swap_sample_id_all(event, data);
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}
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}
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static void perf_event__mmap2_swap(union perf_event *event,
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bool sample_id_all)
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{
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event->mmap2.pid = bswap_32(event->mmap2.pid);
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event->mmap2.tid = bswap_32(event->mmap2.tid);
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event->mmap2.start = bswap_64(event->mmap2.start);
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event->mmap2.len = bswap_64(event->mmap2.len);
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event->mmap2.pgoff = bswap_64(event->mmap2.pgoff);
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event->mmap2.maj = bswap_32(event->mmap2.maj);
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event->mmap2.min = bswap_32(event->mmap2.min);
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event->mmap2.ino = bswap_64(event->mmap2.ino);
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if (sample_id_all) {
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void *data = &event->mmap2.filename;
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data += PERF_ALIGN(strlen(data) + 1, sizeof(u64));
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swap_sample_id_all(event, data);
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}
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}
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static void perf_event__task_swap(union perf_event *event, bool sample_id_all)
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{
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event->fork.pid = bswap_32(event->fork.pid);
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event->fork.tid = bswap_32(event->fork.tid);
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event->fork.ppid = bswap_32(event->fork.ppid);
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event->fork.ptid = bswap_32(event->fork.ptid);
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event->fork.time = bswap_64(event->fork.time);
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if (sample_id_all)
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swap_sample_id_all(event, &event->fork + 1);
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}
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static void perf_event__read_swap(union perf_event *event, bool sample_id_all)
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{
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event->read.pid = bswap_32(event->read.pid);
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event->read.tid = bswap_32(event->read.tid);
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event->read.value = bswap_64(event->read.value);
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event->read.time_enabled = bswap_64(event->read.time_enabled);
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event->read.time_running = bswap_64(event->read.time_running);
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event->read.id = bswap_64(event->read.id);
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if (sample_id_all)
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swap_sample_id_all(event, &event->read + 1);
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}
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static void perf_event__throttle_swap(union perf_event *event,
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bool sample_id_all)
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{
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event->throttle.time = bswap_64(event->throttle.time);
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event->throttle.id = bswap_64(event->throttle.id);
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event->throttle.stream_id = bswap_64(event->throttle.stream_id);
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if (sample_id_all)
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swap_sample_id_all(event, &event->throttle + 1);
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}
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static u8 revbyte(u8 b)
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{
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int rev = (b >> 4) | ((b & 0xf) << 4);
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rev = ((rev & 0xcc) >> 2) | ((rev & 0x33) << 2);
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rev = ((rev & 0xaa) >> 1) | ((rev & 0x55) << 1);
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return (u8) rev;
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}
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/*
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* XXX this is hack in attempt to carry flags bitfield
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* throught endian village. ABI says:
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*
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* Bit-fields are allocated from right to left (least to most significant)
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* on little-endian implementations and from left to right (most to least
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* significant) on big-endian implementations.
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*
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* The above seems to be byte specific, so we need to reverse each
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* byte of the bitfield. 'Internet' also says this might be implementation
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* specific and we probably need proper fix and carry perf_event_attr
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* bitfield flags in separate data file FEAT_ section. Thought this seems
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* to work for now.
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*/
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static void swap_bitfield(u8 *p, unsigned len)
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{
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unsigned i;
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for (i = 0; i < len; i++) {
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*p = revbyte(*p);
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p++;
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}
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}
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/* exported for swapping attributes in file header */
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void perf_event__attr_swap(struct perf_event_attr *attr)
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{
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attr->type = bswap_32(attr->type);
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attr->size = bswap_32(attr->size);
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attr->config = bswap_64(attr->config);
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attr->sample_period = bswap_64(attr->sample_period);
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attr->sample_type = bswap_64(attr->sample_type);
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attr->read_format = bswap_64(attr->read_format);
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attr->wakeup_events = bswap_32(attr->wakeup_events);
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attr->bp_type = bswap_32(attr->bp_type);
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attr->bp_addr = bswap_64(attr->bp_addr);
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attr->bp_len = bswap_64(attr->bp_len);
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attr->branch_sample_type = bswap_64(attr->branch_sample_type);
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attr->sample_regs_user = bswap_64(attr->sample_regs_user);
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attr->sample_stack_user = bswap_32(attr->sample_stack_user);
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swap_bitfield((u8 *) (&attr->read_format + 1), sizeof(u64));
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}
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static void perf_event__hdr_attr_swap(union perf_event *event,
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bool sample_id_all __maybe_unused)
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{
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size_t size;
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perf_event__attr_swap(&event->attr.attr);
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size = event->header.size;
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size -= (void *)&event->attr.id - (void *)event;
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mem_bswap_64(event->attr.id, size);
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}
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static void perf_event__event_type_swap(union perf_event *event,
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bool sample_id_all __maybe_unused)
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{
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event->event_type.event_type.event_id =
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bswap_64(event->event_type.event_type.event_id);
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}
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static void perf_event__tracing_data_swap(union perf_event *event,
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bool sample_id_all __maybe_unused)
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{
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event->tracing_data.size = bswap_32(event->tracing_data.size);
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}
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typedef void (*perf_event__swap_op)(union perf_event *event,
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bool sample_id_all);
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static perf_event__swap_op perf_event__swap_ops[] = {
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[PERF_RECORD_MMAP] = perf_event__mmap_swap,
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[PERF_RECORD_MMAP2] = perf_event__mmap2_swap,
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[PERF_RECORD_COMM] = perf_event__comm_swap,
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[PERF_RECORD_FORK] = perf_event__task_swap,
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[PERF_RECORD_EXIT] = perf_event__task_swap,
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[PERF_RECORD_LOST] = perf_event__all64_swap,
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[PERF_RECORD_READ] = perf_event__read_swap,
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[PERF_RECORD_THROTTLE] = perf_event__throttle_swap,
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[PERF_RECORD_UNTHROTTLE] = perf_event__throttle_swap,
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[PERF_RECORD_SAMPLE] = perf_event__all64_swap,
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[PERF_RECORD_HEADER_ATTR] = perf_event__hdr_attr_swap,
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[PERF_RECORD_HEADER_EVENT_TYPE] = perf_event__event_type_swap,
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[PERF_RECORD_HEADER_TRACING_DATA] = perf_event__tracing_data_swap,
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[PERF_RECORD_HEADER_BUILD_ID] = NULL,
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[PERF_RECORD_ID_INDEX] = perf_event__all64_swap,
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[PERF_RECORD_HEADER_MAX] = NULL,
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};
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/*
|
|
* 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,
|
|
union perf_event *event __maybe_unused,
|
|
struct perf_session *session)
|
|
{
|
|
struct ordered_events *oe = &session->ordered_events;
|
|
struct perf_evlist *evlist = session->evlist;
|
|
struct machines *machines = &session->machines;
|
|
|
|
return ordered_events__flush(oe, machines, evlist, tool, OE_FLUSH__ROUND);
|
|
}
|
|
|
|
int perf_session_queue_event(struct perf_session *s, union perf_event *event,
|
|
struct perf_tool *tool, struct perf_sample *sample,
|
|
u64 file_offset)
|
|
{
|
|
struct ordered_events *oe = &s->ordered_events;
|
|
struct perf_evlist *evlist = s->evlist;
|
|
struct machines *machines = &s->machines;
|
|
|
|
u64 timestamp = sample->time;
|
|
struct ordered_event *new;
|
|
|
|
if (!timestamp || timestamp == ~0ULL)
|
|
return -ETIME;
|
|
|
|
if (timestamp < oe->last_flush) {
|
|
pr_oe_time(timestamp, "out of order event\n");
|
|
pr_oe_time(oe->last_flush, "last flush, last_flush_type %d\n",
|
|
oe->last_flush_type);
|
|
|
|
s->evlist->stats.nr_unordered_events++;
|
|
}
|
|
|
|
new = ordered_events__new(oe, timestamp, event);
|
|
if (!new) {
|
|
ordered_events__flush(oe, machines, evlist, tool, OE_FLUSH__HALF);
|
|
new = ordered_events__new(oe, timestamp, event);
|
|
}
|
|
|
|
if (!new)
|
|
return -ENOMEM;
|
|
|
|
new->file_offset = file_offset;
|
|
return 0;
|
|
}
|
|
|
|
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 perf_evsel *evsel,
|
|
struct perf_sample *sample)
|
|
{
|
|
unsigned int i;
|
|
struct ip_callchain *callchain = sample->callchain;
|
|
|
|
if (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)
|
|
{
|
|
uint64_t i;
|
|
|
|
printf("... branch stack: nr:%" PRIu64 "\n", sample->branch_stack->nr);
|
|
|
|
for (i = 0; i < sample->branch_stack->nr; i++)
|
|
printf("..... %2"PRIu64": %016" PRIx64 " -> %016" PRIx64 "\n",
|
|
i, sample->branch_stack->entries[i].from,
|
|
sample->branch_stack->entries[i].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 perf_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 perf_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 (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 perf_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->attr.sample_type;
|
|
|
|
if (sample_type & PERF_SAMPLE_CALLCHAIN)
|
|
callchain__printf(evsel, sample);
|
|
|
|
if ((sample_type & PERF_SAMPLE_BRANCH_STACK) && !has_branch_callstack(evsel))
|
|
branch_stack__printf(sample);
|
|
|
|
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_TRANSACTION)
|
|
printf("... transaction: %" PRIx64 "\n", sample->transaction);
|
|
|
|
if (sample_type & PERF_SAMPLE_READ)
|
|
sample_read__printf(sample, evsel->attr.read_format);
|
|
}
|
|
|
|
static struct machine *machines__find_for_cpumode(struct machines *machines,
|
|
union perf_event *event,
|
|
struct perf_sample *sample)
|
|
{
|
|
const u8 cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
|
|
struct machine *machine;
|
|
|
|
if (perf_guest &&
|
|
((cpumode == PERF_RECORD_MISC_GUEST_KERNEL) ||
|
|
(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__find(machines, DEFAULT_GUEST_KERNEL_ID);
|
|
return machine;
|
|
}
|
|
|
|
return &machines->host;
|
|
}
|
|
|
|
static int deliver_sample_value(struct perf_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);
|
|
|
|
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;
|
|
}
|
|
|
|
return tool->sample(tool, event, sample, sid->evsel, machine);
|
|
}
|
|
|
|
static int deliver_sample_group(struct perf_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 perf_evlist *evlist,
|
|
struct perf_tool *tool,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct perf_evsel *evsel,
|
|
struct machine *machine)
|
|
{
|
|
/* We know evsel != NULL. */
|
|
u64 sample_type = evsel->attr.sample_type;
|
|
u64 read_format = evsel->attr.read_format;
|
|
|
|
/* Standard sample delievery. */
|
|
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);
|
|
}
|
|
|
|
int machines__deliver_event(struct machines *machines,
|
|
struct perf_evlist *evlist,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct perf_tool *tool, u64 file_offset)
|
|
{
|
|
struct perf_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:
|
|
dump_sample(evsel, event, sample);
|
|
if (evsel == NULL) {
|
|
++evlist->stats.nr_unknown_id;
|
|
return 0;
|
|
}
|
|
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:
|
|
return tool->mmap2(tool, event, sample, machine);
|
|
case PERF_RECORD_COMM:
|
|
return tool->comm(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_READ:
|
|
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);
|
|
default:
|
|
++evlist->stats.nr_unknown_events;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
static s64 perf_session__process_user_event(struct perf_session *session,
|
|
union perf_event *event,
|
|
struct perf_tool *tool,
|
|
u64 file_offset)
|
|
{
|
|
int fd = perf_data_file__fd(session->file);
|
|
int err;
|
|
|
|
dump_event(session->evlist, event, file_offset, NULL);
|
|
|
|
/* 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_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(tool, event, session);
|
|
case PERF_RECORD_HEADER_BUILD_ID:
|
|
return tool->build_id(tool, event, session);
|
|
case PERF_RECORD_FINISHED_ROUND:
|
|
return tool->finished_round(tool, event, session);
|
|
case PERF_RECORD_ID_INDEX:
|
|
return tool->id_index(tool, event, session);
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
int perf_session__deliver_synth_event(struct perf_session *session,
|
|
union perf_event *event,
|
|
struct perf_sample *sample,
|
|
struct perf_tool *tool)
|
|
{
|
|
struct perf_evlist *evlist = session->evlist;
|
|
|
|
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, tool, 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_file__is_pipe(session->file))
|
|
return -1;
|
|
|
|
fd = perf_data_file__fd(session->file);
|
|
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)
|
|
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,
|
|
struct perf_tool *tool,
|
|
u64 file_offset)
|
|
{
|
|
struct perf_evlist *evlist = session->evlist;
|
|
struct perf_sample sample;
|
|
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, tool, file_offset);
|
|
|
|
/*
|
|
* For all kernel events we get the sample data
|
|
*/
|
|
ret = perf_evlist__parse_sample(evlist, event, &sample);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (tool->ordered_events) {
|
|
ret = perf_session_queue_event(session, event, tool, &sample,
|
|
file_offset);
|
|
if (ret != -ETIME)
|
|
return ret;
|
|
}
|
|
|
|
return machines__deliver_event(&session->machines, evlist, event,
|
|
&sample, 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);
|
|
}
|
|
|
|
static struct thread *perf_session__register_idle_thread(struct perf_session *session)
|
|
{
|
|
struct thread *thread;
|
|
|
|
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");
|
|
thread = NULL;
|
|
}
|
|
|
|
return thread;
|
|
}
|
|
|
|
static void perf_tool__warn_about_errors(const struct perf_tool *tool,
|
|
const struct events_stats *stats)
|
|
{
|
|
if (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 (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);
|
|
}
|
|
|
|
if (stats->nr_unordered_events != 0)
|
|
ui__warning("%u out of order events recorded.\n", stats->nr_unordered_events);
|
|
}
|
|
|
|
volatile int session_done;
|
|
|
|
static int __perf_session__process_pipe_events(struct perf_session *session,
|
|
struct perf_tool *tool)
|
|
{
|
|
struct ordered_events *oe = &session->ordered_events;
|
|
struct perf_evlist *evlist = session->evlist;
|
|
struct machines *machines = &session->machines;
|
|
int fd = perf_data_file__fd(session->file);
|
|
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;
|
|
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, tool, 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;
|
|
|
|
if (!session_done())
|
|
goto more;
|
|
done:
|
|
/* do the final flush for ordered samples */
|
|
err = ordered_events__flush(oe, machines, evlist, tool, OE_FLUSH__FINAL);
|
|
out_err:
|
|
free(buf);
|
|
perf_tool__warn_about_errors(tool, &session->evlist->stats);
|
|
ordered_events__free(&session->ordered_events);
|
|
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);
|
|
return NULL;
|
|
}
|
|
|
|
return event;
|
|
}
|
|
|
|
/*
|
|
* 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
|
|
|
|
static int __perf_session__process_events(struct perf_session *session,
|
|
u64 data_offset, u64 data_size,
|
|
u64 file_size, struct perf_tool *tool)
|
|
{
|
|
struct ordered_events *oe = &session->ordered_events;
|
|
struct perf_evlist *evlist = session->evlist;
|
|
struct machines *machines = &session->machines;
|
|
int fd = perf_data_file__fd(session->file);
|
|
u64 head, page_offset, file_offset, file_pos, size;
|
|
int err, mmap_prot, mmap_flags, map_idx = 0;
|
|
size_t mmap_size;
|
|
char *buf, *mmaps[NUM_MMAPS];
|
|
union perf_event *event;
|
|
struct ui_progress prog;
|
|
s64 skip;
|
|
|
|
perf_tool__fill_defaults(tool);
|
|
|
|
page_offset = page_size * (data_offset / page_size);
|
|
file_offset = page_offset;
|
|
head = data_offset - page_offset;
|
|
|
|
if (data_size && (data_offset + data_size < file_size))
|
|
file_size = data_offset + data_size;
|
|
|
|
ui_progress__init(&prog, file_size, "Processing events...");
|
|
|
|
mmap_size = MMAP_SIZE;
|
|
if (mmap_size > file_size) {
|
|
mmap_size = file_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, fd,
|
|
file_offset);
|
|
if (buf == MAP_FAILED) {
|
|
pr_err("failed to mmap file\n");
|
|
err = -errno;
|
|
goto out_err;
|
|
}
|
|
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 (!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;
|
|
|
|
if (size < sizeof(struct perf_event_header) ||
|
|
(skip = perf_session__process_event(session, event, tool, file_pos))
|
|
< 0) {
|
|
pr_err("%#" PRIx64 " [%#x]: failed to process type: %d\n",
|
|
file_offset + head, event->header.size,
|
|
event->header.type);
|
|
err = -EINVAL;
|
|
goto out_err;
|
|
}
|
|
|
|
if (skip)
|
|
size += skip;
|
|
|
|
head += size;
|
|
file_pos += size;
|
|
|
|
ui_progress__update(&prog, size);
|
|
|
|
if (session_done())
|
|
goto out;
|
|
|
|
if (file_pos < file_size)
|
|
goto more;
|
|
|
|
out:
|
|
/* do the final flush for ordered samples */
|
|
err = ordered_events__flush(oe, machines, evlist, tool, OE_FLUSH__FINAL);
|
|
out_err:
|
|
ui_progress__finish();
|
|
perf_tool__warn_about_errors(tool, &session->evlist->stats);
|
|
ordered_events__free(&session->ordered_events);
|
|
session->one_mmap = false;
|
|
return err;
|
|
}
|
|
|
|
int perf_session__process_events(struct perf_session *session,
|
|
struct perf_tool *tool)
|
|
{
|
|
u64 size = perf_data_file__size(session->file);
|
|
int err;
|
|
|
|
if (perf_session__register_idle_thread(session) == NULL)
|
|
return -ENOMEM;
|
|
|
|
if (!perf_data_file__is_pipe(session->file))
|
|
err = __perf_session__process_events(session,
|
|
session->header.data_offset,
|
|
session->header.data_size,
|
|
size, tool);
|
|
else
|
|
err = __perf_session__process_pipe_events(session, tool);
|
|
|
|
return err;
|
|
}
|
|
|
|
bool perf_session__has_traces(struct perf_session *session, const char *msg)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
|
|
evlist__for_each(session->evlist, evsel) {
|
|
if (evsel->attr.type == PERF_TYPE_TRACEPOINT)
|
|
return true;
|
|
}
|
|
|
|
pr_err("No trace sample to read. Did you call 'perf %s'?\n", msg);
|
|
return false;
|
|
}
|
|
|
|
int maps__set_kallsyms_ref_reloc_sym(struct map **maps,
|
|
const char *symbol_name, u64 addr)
|
|
{
|
|
char *bracket;
|
|
enum map_type i;
|
|
struct ref_reloc_sym *ref;
|
|
|
|
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;
|
|
|
|
for (i = 0; i < MAP__NR_TYPES; ++i) {
|
|
struct kmap *kmap = map__kmap(maps[i]);
|
|
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 = fprintf(fp, "Aggregated stats:\n");
|
|
|
|
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 perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
|
|
unsigned int type)
|
|
{
|
|
struct perf_evsel *pos;
|
|
|
|
evlist__for_each(session->evlist, pos) {
|
|
if (pos->attr.type == type)
|
|
return pos;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
|
|
struct addr_location *al,
|
|
unsigned int print_opts, unsigned int stack_depth)
|
|
{
|
|
struct callchain_cursor_node *node;
|
|
int print_ip = print_opts & PRINT_IP_OPT_IP;
|
|
int print_sym = print_opts & PRINT_IP_OPT_SYM;
|
|
int print_dso = print_opts & PRINT_IP_OPT_DSO;
|
|
int print_symoffset = print_opts & PRINT_IP_OPT_SYMOFFSET;
|
|
int print_oneline = print_opts & PRINT_IP_OPT_ONELINE;
|
|
int print_srcline = print_opts & PRINT_IP_OPT_SRCLINE;
|
|
char s = print_oneline ? ' ' : '\t';
|
|
|
|
if (symbol_conf.use_callchain && sample->callchain) {
|
|
struct addr_location node_al;
|
|
|
|
if (thread__resolve_callchain(al->thread, evsel,
|
|
sample, NULL, NULL,
|
|
PERF_MAX_STACK_DEPTH) != 0) {
|
|
if (verbose)
|
|
error("Failed to resolve callchain. Skipping\n");
|
|
return;
|
|
}
|
|
callchain_cursor_commit(&callchain_cursor);
|
|
|
|
if (print_symoffset)
|
|
node_al = *al;
|
|
|
|
while (stack_depth) {
|
|
u64 addr = 0;
|
|
|
|
node = callchain_cursor_current(&callchain_cursor);
|
|
if (!node)
|
|
break;
|
|
|
|
if (node->sym && node->sym->ignore)
|
|
goto next;
|
|
|
|
if (print_ip)
|
|
printf("%c%16" PRIx64, s, node->ip);
|
|
|
|
if (node->map)
|
|
addr = node->map->map_ip(node->map, node->ip);
|
|
|
|
if (print_sym) {
|
|
printf(" ");
|
|
if (print_symoffset) {
|
|
node_al.addr = addr;
|
|
node_al.map = node->map;
|
|
symbol__fprintf_symname_offs(node->sym, &node_al, stdout);
|
|
} else
|
|
symbol__fprintf_symname(node->sym, stdout);
|
|
}
|
|
|
|
if (print_dso) {
|
|
printf(" (");
|
|
map__fprintf_dsoname(node->map, stdout);
|
|
printf(")");
|
|
}
|
|
|
|
if (print_srcline)
|
|
map__fprintf_srcline(node->map, addr, "\n ",
|
|
stdout);
|
|
|
|
if (!print_oneline)
|
|
printf("\n");
|
|
|
|
stack_depth--;
|
|
next:
|
|
callchain_cursor_advance(&callchain_cursor);
|
|
}
|
|
|
|
} else {
|
|
if (al->sym && al->sym->ignore)
|
|
return;
|
|
|
|
if (print_ip)
|
|
printf("%16" PRIx64, sample->ip);
|
|
|
|
if (print_sym) {
|
|
printf(" ");
|
|
if (print_symoffset)
|
|
symbol__fprintf_symname_offs(al->sym, al,
|
|
stdout);
|
|
else
|
|
symbol__fprintf_symname(al->sym, stdout);
|
|
}
|
|
|
|
if (print_dso) {
|
|
printf(" (");
|
|
map__fprintf_dsoname(al->map, stdout);
|
|
printf(")");
|
|
}
|
|
|
|
if (print_srcline)
|
|
map__fprintf_srcline(al->map, al->addr, "\n ", stdout);
|
|
}
|
|
}
|
|
|
|
int perf_session__cpu_bitmap(struct perf_session *session,
|
|
const char *cpu_list, unsigned long *cpu_bitmap)
|
|
{
|
|
int i, err = -1;
|
|
struct cpu_map *map;
|
|
|
|
for (i = 0; i < PERF_TYPE_MAX; ++i) {
|
|
struct perf_evsel *evsel;
|
|
|
|
evsel = perf_session__find_first_evtype(session, i);
|
|
if (!evsel)
|
|
continue;
|
|
|
|
if (!(evsel->attr.sample_type & PERF_SAMPLE_CPU)) {
|
|
pr_err("File does not contain CPU events. "
|
|
"Remove -c option to proceed.\n");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
map = 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 >= MAX_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:
|
|
cpu_map__delete(map);
|
|
return err;
|
|
}
|
|
|
|
void perf_session__fprintf_info(struct perf_session *session, FILE *fp,
|
|
bool full)
|
|
{
|
|
struct stat st;
|
|
int fd, ret;
|
|
|
|
if (session == NULL || fp == NULL)
|
|
return;
|
|
|
|
fd = perf_data_file__fd(session->file);
|
|
|
|
ret = fstat(fd, &st);
|
|
if (ret == -1)
|
|
return;
|
|
|
|
fprintf(fp, "# ========\n");
|
|
fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
|
|
perf_header__fprintf_info(session, fp, full);
|
|
fprintf(fp, "# ========\n#\n");
|
|
}
|
|
|
|
|
|
int __perf_session__set_tracepoints_handlers(struct perf_session *session,
|
|
const struct perf_evsel_str_handler *assocs,
|
|
size_t nr_assocs)
|
|
{
|
|
struct perf_evsel *evsel;
|
|
size_t i;
|
|
int err;
|
|
|
|
for (i = 0; i < nr_assocs; i++) {
|
|
/*
|
|
* Adding a handler for an event not in the session,
|
|
* just ignore it.
|
|
*/
|
|
evsel = perf_evlist__find_tracepoint_by_name(session->evlist, assocs[i].name);
|
|
if (evsel == NULL)
|
|
continue;
|
|
|
|
err = -EEXIST;
|
|
if (evsel->handler != NULL)
|
|
goto out;
|
|
evsel->handler = assocs[i].handler;
|
|
}
|
|
|
|
err = 0;
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
int perf_event__process_id_index(struct perf_tool *tool __maybe_unused,
|
|
union perf_event *event,
|
|
struct perf_session *session)
|
|
{
|
|
struct perf_evlist *evlist = session->evlist;
|
|
struct id_index_event *ie = &event->id_index;
|
|
size_t i, nr, max_nr;
|
|
|
|
max_nr = (ie->header.size - sizeof(struct id_index_event)) /
|
|
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: %"PRIu64, e->id);
|
|
fprintf(stdout, " idx: %"PRIu64, e->idx);
|
|
fprintf(stdout, " cpu: %"PRId64, e->cpu);
|
|
fprintf(stdout, " tid: %"PRId64"\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;
|
|
}
|
|
|
|
int perf_event__synthesize_id_index(struct perf_tool *tool,
|
|
perf_event__handler_t process,
|
|
struct perf_evlist *evlist,
|
|
struct machine *machine)
|
|
{
|
|
union perf_event *ev;
|
|
struct perf_evsel *evsel;
|
|
size_t nr = 0, i = 0, sz, max_nr, n;
|
|
int err;
|
|
|
|
pr_debug2("Synthesizing id index\n");
|
|
|
|
max_nr = (UINT16_MAX - sizeof(struct id_index_event)) /
|
|
sizeof(struct id_index_entry);
|
|
|
|
evlist__for_each(evlist, evsel)
|
|
nr += evsel->ids;
|
|
|
|
n = nr > max_nr ? max_nr : nr;
|
|
sz = sizeof(struct id_index_event) + n * sizeof(struct id_index_entry);
|
|
ev = zalloc(sz);
|
|
if (!ev)
|
|
return -ENOMEM;
|
|
|
|
ev->id_index.header.type = PERF_RECORD_ID_INDEX;
|
|
ev->id_index.header.size = sz;
|
|
ev->id_index.nr = n;
|
|
|
|
evlist__for_each(evlist, evsel) {
|
|
u32 j;
|
|
|
|
for (j = 0; j < evsel->ids; j++) {
|
|
struct id_index_entry *e;
|
|
struct perf_sample_id *sid;
|
|
|
|
if (i >= n) {
|
|
err = process(tool, ev, NULL, machine);
|
|
if (err)
|
|
goto out_err;
|
|
nr -= n;
|
|
i = 0;
|
|
}
|
|
|
|
e = &ev->id_index.entries[i++];
|
|
|
|
e->id = evsel->id[j];
|
|
|
|
sid = perf_evlist__id2sid(evlist, e->id);
|
|
if (!sid) {
|
|
free(ev);
|
|
return -ENOENT;
|
|
}
|
|
|
|
e->idx = sid->idx;
|
|
e->cpu = sid->cpu;
|
|
e->tid = sid->tid;
|
|
}
|
|
}
|
|
|
|
sz = sizeof(struct id_index_event) + nr * sizeof(struct id_index_entry);
|
|
ev->id_index.header.size = sz;
|
|
ev->id_index.nr = nr;
|
|
|
|
err = process(tool, ev, NULL, machine);
|
|
out_err:
|
|
free(ev);
|
|
|
|
return err;
|
|
}
|