![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
And move the event_t methods to the perf_event__ too. No code changes, just namespace consistency. Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
904 lines
22 KiB
C
904 lines
22 KiB
C
/*
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* builtin-record.c
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*
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* Builtin record command: Record the profile of a workload
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* (or a CPU, or a PID) into the perf.data output file - for
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* later analysis via perf report.
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*/
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#define _FILE_OFFSET_BITS 64
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#include "builtin.h"
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#include "perf.h"
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#include "util/build-id.h"
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#include "util/util.h"
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#include "util/parse-options.h"
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#include "util/parse-events.h"
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#include "util/header.h"
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#include "util/event.h"
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#include "util/evlist.h"
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#include "util/evsel.h"
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#include "util/debug.h"
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#include "util/session.h"
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#include "util/symbol.h"
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#include "util/cpumap.h"
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#include "util/thread_map.h"
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#include <unistd.h>
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#include <sched.h>
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#include <sys/mman.h>
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#define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
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#define SID(e, x, y) xyarray__entry(e->id, x, y)
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enum write_mode_t {
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WRITE_FORCE,
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WRITE_APPEND
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};
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static u64 user_interval = ULLONG_MAX;
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static u64 default_interval = 0;
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static u64 sample_type;
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static struct cpu_map *cpus;
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static unsigned int page_size;
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static unsigned int mmap_pages = 128;
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static unsigned int user_freq = UINT_MAX;
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static int freq = 1000;
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static int output;
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static int pipe_output = 0;
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static const char *output_name = NULL;
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static int group = 0;
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static int realtime_prio = 0;
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static bool nodelay = false;
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static bool raw_samples = false;
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static bool sample_id_all_avail = true;
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static bool system_wide = false;
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static pid_t target_pid = -1;
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static pid_t target_tid = -1;
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static struct thread_map *threads;
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static pid_t child_pid = -1;
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static bool no_inherit = false;
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static enum write_mode_t write_mode = WRITE_FORCE;
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static bool call_graph = false;
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static bool inherit_stat = false;
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static bool no_samples = false;
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static bool sample_address = false;
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static bool sample_time = false;
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static bool no_buildid = false;
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static bool no_buildid_cache = false;
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static struct perf_evlist *evsel_list;
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static long samples = 0;
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static u64 bytes_written = 0;
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static int file_new = 1;
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static off_t post_processing_offset;
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static struct perf_session *session;
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static const char *cpu_list;
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static void advance_output(size_t size)
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{
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bytes_written += size;
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}
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static void write_output(void *buf, size_t size)
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{
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while (size) {
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int ret = write(output, buf, size);
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if (ret < 0)
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die("failed to write");
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size -= ret;
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buf += ret;
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bytes_written += ret;
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}
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}
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static int process_synthesized_event(union perf_event *event,
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struct perf_sample *sample __used,
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struct perf_session *self __used)
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{
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write_output(event, event->header.size);
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return 0;
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}
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static void mmap_read(struct perf_mmap *md)
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{
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unsigned int head = perf_mmap__read_head(md);
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unsigned int old = md->prev;
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unsigned char *data = md->base + page_size;
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unsigned long size;
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void *buf;
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if (old == head)
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return;
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samples++;
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size = head - old;
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if ((old & md->mask) + size != (head & md->mask)) {
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buf = &data[old & md->mask];
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size = md->mask + 1 - (old & md->mask);
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old += size;
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write_output(buf, size);
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}
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buf = &data[old & md->mask];
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size = head - old;
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old += size;
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write_output(buf, size);
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md->prev = old;
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perf_mmap__write_tail(md, old);
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}
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static volatile int done = 0;
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static volatile int signr = -1;
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static void sig_handler(int sig)
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{
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done = 1;
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signr = sig;
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}
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static void sig_atexit(void)
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{
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if (child_pid > 0)
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kill(child_pid, SIGTERM);
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if (signr == -1 || signr == SIGUSR1)
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return;
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signal(signr, SIG_DFL);
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kill(getpid(), signr);
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}
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static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int nr)
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{
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struct perf_header_attr *h_attr;
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if (nr < session->header.attrs) {
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h_attr = session->header.attr[nr];
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} else {
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h_attr = perf_header_attr__new(a);
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if (h_attr != NULL)
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if (perf_header__add_attr(&session->header, h_attr) < 0) {
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perf_header_attr__delete(h_attr);
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h_attr = NULL;
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}
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}
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return h_attr;
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}
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static void create_counter(struct perf_evsel *evsel, int cpu)
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{
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char *filter = evsel->filter;
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struct perf_event_attr *attr = &evsel->attr;
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struct perf_header_attr *h_attr;
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struct perf_sample_id *sid;
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int thread_index;
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int ret;
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for (thread_index = 0; thread_index < threads->nr; thread_index++) {
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h_attr = get_header_attr(attr, evsel->idx);
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if (h_attr == NULL)
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die("nomem\n");
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if (!file_new) {
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if (memcmp(&h_attr->attr, attr, sizeof(*attr))) {
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fprintf(stderr, "incompatible append\n");
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exit(-1);
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}
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}
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sid = SID(evsel, cpu, thread_index);
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if (perf_header_attr__add_id(h_attr, sid->id) < 0) {
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pr_warning("Not enough memory to add id\n");
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exit(-1);
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}
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if (filter != NULL) {
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ret = ioctl(FD(evsel, cpu, thread_index),
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PERF_EVENT_IOC_SET_FILTER, filter);
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if (ret) {
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error("failed to set filter with %d (%s)\n", errno,
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strerror(errno));
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exit(-1);
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}
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}
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}
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if (!sample_type)
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sample_type = attr->sample_type;
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}
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static void config_attr(struct perf_evsel *evsel, struct perf_evlist *evlist)
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{
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struct perf_event_attr *attr = &evsel->attr;
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int track = !evsel->idx; /* only the first counter needs these */
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attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
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PERF_FORMAT_TOTAL_TIME_RUNNING |
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PERF_FORMAT_ID;
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attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
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if (evlist->nr_entries > 1)
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attr->sample_type |= PERF_SAMPLE_ID;
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/*
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* We default some events to a 1 default interval. But keep
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* it a weak assumption overridable by the user.
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*/
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if (!attr->sample_period || (user_freq != UINT_MAX &&
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user_interval != ULLONG_MAX)) {
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if (freq) {
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attr->sample_type |= PERF_SAMPLE_PERIOD;
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attr->freq = 1;
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attr->sample_freq = freq;
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} else {
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attr->sample_period = default_interval;
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}
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}
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if (no_samples)
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attr->sample_freq = 0;
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if (inherit_stat)
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attr->inherit_stat = 1;
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if (sample_address) {
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attr->sample_type |= PERF_SAMPLE_ADDR;
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attr->mmap_data = track;
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}
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if (call_graph)
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attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
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if (system_wide)
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attr->sample_type |= PERF_SAMPLE_CPU;
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if (sample_id_all_avail &&
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(sample_time || system_wide || !no_inherit || cpu_list))
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attr->sample_type |= PERF_SAMPLE_TIME;
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if (raw_samples) {
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attr->sample_type |= PERF_SAMPLE_TIME;
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attr->sample_type |= PERF_SAMPLE_RAW;
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attr->sample_type |= PERF_SAMPLE_CPU;
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}
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if (nodelay) {
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attr->watermark = 0;
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attr->wakeup_events = 1;
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}
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attr->mmap = track;
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attr->comm = track;
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if (target_pid == -1 && target_tid == -1 && !system_wide) {
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attr->disabled = 1;
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attr->enable_on_exec = 1;
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}
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}
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static void open_counters(struct perf_evlist *evlist)
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{
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struct perf_evsel *pos;
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int cpu;
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list_for_each_entry(pos, &evlist->entries, node) {
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struct perf_event_attr *attr = &pos->attr;
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/*
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* Check if parse_single_tracepoint_event has already asked for
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* PERF_SAMPLE_TIME.
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*
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* XXX this is kludgy but short term fix for problems introduced by
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* eac23d1c that broke 'perf script' by having different sample_types
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* when using multiple tracepoint events when we use a perf binary
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* that tries to use sample_id_all on an older kernel.
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*
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* We need to move counter creation to perf_session, support
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* different sample_types, etc.
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*/
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bool time_needed = attr->sample_type & PERF_SAMPLE_TIME;
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config_attr(pos, evlist);
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retry_sample_id:
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attr->sample_id_all = sample_id_all_avail ? 1 : 0;
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try_again:
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if (perf_evsel__open(pos, cpus, threads, group, !no_inherit) < 0) {
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int err = errno;
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if (err == EPERM || err == EACCES)
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die("Permission error - are you root?\n"
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"\t Consider tweaking"
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" /proc/sys/kernel/perf_event_paranoid.\n");
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else if (err == ENODEV && cpu_list) {
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die("No such device - did you specify"
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" an out-of-range profile CPU?\n");
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} else if (err == EINVAL && sample_id_all_avail) {
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/*
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* Old kernel, no attr->sample_id_type_all field
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*/
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sample_id_all_avail = false;
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if (!sample_time && !raw_samples && !time_needed)
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attr->sample_type &= ~PERF_SAMPLE_TIME;
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goto retry_sample_id;
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}
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/*
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* If it's cycles then fall back to hrtimer
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* based cpu-clock-tick sw counter, which
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* is always available even if no PMU support:
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*/
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if (attr->type == PERF_TYPE_HARDWARE
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&& attr->config == PERF_COUNT_HW_CPU_CYCLES) {
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if (verbose)
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warning(" ... trying to fall back to cpu-clock-ticks\n");
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attr->type = PERF_TYPE_SOFTWARE;
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attr->config = PERF_COUNT_SW_CPU_CLOCK;
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goto try_again;
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}
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printf("\n");
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error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n",
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err, strerror(err));
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#if defined(__i386__) || defined(__x86_64__)
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if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP)
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die("No hardware sampling interrupt available."
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" No APIC? If so then you can boot the kernel"
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" with the \"lapic\" boot parameter to"
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" force-enable it.\n");
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#endif
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die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
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}
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}
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if (perf_evlist__mmap(evlist, cpus, threads, mmap_pages, false) < 0)
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die("failed to mmap with %d (%s)\n", errno, strerror(errno));
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for (cpu = 0; cpu < cpus->nr; ++cpu) {
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list_for_each_entry(pos, &evlist->entries, node)
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create_counter(pos, cpu);
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}
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}
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static int process_buildids(void)
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{
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u64 size = lseek(output, 0, SEEK_CUR);
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if (size == 0)
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return 0;
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session->fd = output;
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return __perf_session__process_events(session, post_processing_offset,
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size - post_processing_offset,
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size, &build_id__mark_dso_hit_ops);
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}
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static void atexit_header(void)
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{
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if (!pipe_output) {
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session->header.data_size += bytes_written;
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if (!no_buildid)
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process_buildids();
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perf_header__write(&session->header, evsel_list, output, true);
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perf_session__delete(session);
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perf_evlist__delete(evsel_list);
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symbol__exit();
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}
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}
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static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
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{
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int err;
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struct perf_session *psession = data;
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if (machine__is_host(machine))
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return;
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/*
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*As for guest kernel when processing subcommand record&report,
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*we arrange module mmap prior to guest kernel mmap and trigger
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*a preload dso because default guest module symbols are loaded
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*from guest kallsyms instead of /lib/modules/XXX/XXX. This
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*method is used to avoid symbol missing when the first addr is
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*in module instead of in guest kernel.
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*/
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err = perf_event__synthesize_modules(process_synthesized_event,
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psession, machine);
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if (err < 0)
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pr_err("Couldn't record guest kernel [%d]'s reference"
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" relocation symbol.\n", machine->pid);
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/*
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* We use _stext for guest kernel because guest kernel's /proc/kallsyms
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* have no _text sometimes.
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*/
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err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
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psession, machine, "_text");
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if (err < 0)
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err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
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psession, machine,
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"_stext");
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if (err < 0)
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pr_err("Couldn't record guest kernel [%d]'s reference"
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" relocation symbol.\n", machine->pid);
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}
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static struct perf_event_header finished_round_event = {
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.size = sizeof(struct perf_event_header),
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.type = PERF_RECORD_FINISHED_ROUND,
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};
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static void mmap_read_all(void)
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{
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int i;
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for (i = 0; i < cpus->nr; i++) {
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if (evsel_list->mmap[i].base)
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mmap_read(&evsel_list->mmap[i]);
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}
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if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO))
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write_output(&finished_round_event, sizeof(finished_round_event));
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}
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static int __cmd_record(int argc, const char **argv)
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{
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int i;
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struct stat st;
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int flags;
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int err;
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unsigned long waking = 0;
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int child_ready_pipe[2], go_pipe[2];
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const bool forks = argc > 0;
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char buf;
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struct machine *machine;
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page_size = sysconf(_SC_PAGE_SIZE);
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atexit(sig_atexit);
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signal(SIGCHLD, sig_handler);
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signal(SIGINT, sig_handler);
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signal(SIGUSR1, sig_handler);
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if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
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perror("failed to create pipes");
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exit(-1);
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}
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if (!output_name) {
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if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode))
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pipe_output = 1;
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else
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output_name = "perf.data";
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}
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if (output_name) {
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if (!strcmp(output_name, "-"))
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pipe_output = 1;
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else if (!stat(output_name, &st) && st.st_size) {
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if (write_mode == WRITE_FORCE) {
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char oldname[PATH_MAX];
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snprintf(oldname, sizeof(oldname), "%s.old",
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output_name);
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unlink(oldname);
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rename(output_name, oldname);
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}
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} else if (write_mode == WRITE_APPEND) {
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write_mode = WRITE_FORCE;
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}
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}
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flags = O_CREAT|O_RDWR;
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if (write_mode == WRITE_APPEND)
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file_new = 0;
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else
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flags |= O_TRUNC;
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if (pipe_output)
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output = STDOUT_FILENO;
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else
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output = open(output_name, flags, S_IRUSR | S_IWUSR);
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if (output < 0) {
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perror("failed to create output file");
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exit(-1);
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}
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session = perf_session__new(output_name, O_WRONLY,
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write_mode == WRITE_FORCE, false, NULL);
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if (session == NULL) {
|
|
pr_err("Not enough memory for reading perf file header\n");
|
|
return -1;
|
|
}
|
|
|
|
if (!no_buildid)
|
|
perf_header__set_feat(&session->header, HEADER_BUILD_ID);
|
|
|
|
if (!file_new) {
|
|
err = perf_header__read(session, output);
|
|
if (err < 0)
|
|
goto out_delete_session;
|
|
}
|
|
|
|
if (have_tracepoints(&evsel_list->entries))
|
|
perf_header__set_feat(&session->header, HEADER_TRACE_INFO);
|
|
|
|
/*
|
|
* perf_session__delete(session) will be called at atexit_header()
|
|
*/
|
|
atexit(atexit_header);
|
|
|
|
if (forks) {
|
|
child_pid = fork();
|
|
if (child_pid < 0) {
|
|
perror("failed to fork");
|
|
exit(-1);
|
|
}
|
|
|
|
if (!child_pid) {
|
|
if (pipe_output)
|
|
dup2(2, 1);
|
|
close(child_ready_pipe[0]);
|
|
close(go_pipe[1]);
|
|
fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
|
|
|
|
/*
|
|
* Do a dummy execvp to get the PLT entry resolved,
|
|
* so we avoid the resolver overhead on the real
|
|
* execvp call.
|
|
*/
|
|
execvp("", (char **)argv);
|
|
|
|
/*
|
|
* Tell the parent we're ready to go
|
|
*/
|
|
close(child_ready_pipe[1]);
|
|
|
|
/*
|
|
* Wait until the parent tells us to go.
|
|
*/
|
|
if (read(go_pipe[0], &buf, 1) == -1)
|
|
perror("unable to read pipe");
|
|
|
|
execvp(argv[0], (char **)argv);
|
|
|
|
perror(argv[0]);
|
|
kill(getppid(), SIGUSR1);
|
|
exit(-1);
|
|
}
|
|
|
|
if (!system_wide && target_tid == -1 && target_pid == -1)
|
|
threads->map[0] = child_pid;
|
|
|
|
close(child_ready_pipe[1]);
|
|
close(go_pipe[0]);
|
|
/*
|
|
* wait for child to settle
|
|
*/
|
|
if (read(child_ready_pipe[0], &buf, 1) == -1) {
|
|
perror("unable to read pipe");
|
|
exit(-1);
|
|
}
|
|
close(child_ready_pipe[0]);
|
|
}
|
|
|
|
open_counters(evsel_list);
|
|
|
|
perf_session__set_sample_type(session, sample_type);
|
|
|
|
if (pipe_output) {
|
|
err = perf_header__write_pipe(output);
|
|
if (err < 0)
|
|
return err;
|
|
} else if (file_new) {
|
|
err = perf_header__write(&session->header, evsel_list,
|
|
output, false);
|
|
if (err < 0)
|
|
return err;
|
|
}
|
|
|
|
post_processing_offset = lseek(output, 0, SEEK_CUR);
|
|
|
|
perf_session__set_sample_id_all(session, sample_id_all_avail);
|
|
|
|
if (pipe_output) {
|
|
err = perf_event__synthesize_attrs(&session->header,
|
|
process_synthesized_event,
|
|
session);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize attrs.\n");
|
|
return err;
|
|
}
|
|
|
|
err = perf_event__synthesize_event_types(process_synthesized_event,
|
|
session);
|
|
if (err < 0) {
|
|
pr_err("Couldn't synthesize event_types.\n");
|
|
return err;
|
|
}
|
|
|
|
if (have_tracepoints(&evsel_list->entries)) {
|
|
/*
|
|
* FIXME err <= 0 here actually means that
|
|
* there were no tracepoints so its not really
|
|
* an error, just that we don't need to
|
|
* synthesize anything. We really have to
|
|
* return this more properly and also
|
|
* propagate errors that now are calling die()
|
|
*/
|
|
err = perf_event__synthesize_tracing_data(output, evsel_list,
|
|
process_synthesized_event,
|
|
session);
|
|
if (err <= 0) {
|
|
pr_err("Couldn't record tracing data.\n");
|
|
return err;
|
|
}
|
|
advance_output(err);
|
|
}
|
|
}
|
|
|
|
machine = perf_session__find_host_machine(session);
|
|
if (!machine) {
|
|
pr_err("Couldn't find native kernel information.\n");
|
|
return -1;
|
|
}
|
|
|
|
err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
|
|
session, machine, "_text");
|
|
if (err < 0)
|
|
err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
|
|
session, machine, "_stext");
|
|
if (err < 0)
|
|
pr_err("Couldn't record kernel reference relocation symbol\n"
|
|
"Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
|
|
"Check /proc/kallsyms permission or run as root.\n");
|
|
|
|
err = perf_event__synthesize_modules(process_synthesized_event,
|
|
session, machine);
|
|
if (err < 0)
|
|
pr_err("Couldn't record kernel module information.\n"
|
|
"Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
|
|
"Check /proc/modules permission or run as root.\n");
|
|
|
|
if (perf_guest)
|
|
perf_session__process_machines(session,
|
|
perf_event__synthesize_guest_os);
|
|
|
|
if (!system_wide)
|
|
perf_event__synthesize_thread(target_tid,
|
|
process_synthesized_event,
|
|
session);
|
|
else
|
|
perf_event__synthesize_threads(process_synthesized_event,
|
|
session);
|
|
|
|
if (realtime_prio) {
|
|
struct sched_param param;
|
|
|
|
param.sched_priority = realtime_prio;
|
|
if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
|
|
pr_err("Could not set realtime priority.\n");
|
|
exit(-1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Let the child rip
|
|
*/
|
|
if (forks)
|
|
close(go_pipe[1]);
|
|
|
|
for (;;) {
|
|
int hits = samples;
|
|
int thread;
|
|
|
|
mmap_read_all();
|
|
|
|
if (hits == samples) {
|
|
if (done)
|
|
break;
|
|
err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1);
|
|
waking++;
|
|
}
|
|
|
|
if (done) {
|
|
for (i = 0; i < cpus->nr; i++) {
|
|
struct perf_evsel *pos;
|
|
|
|
list_for_each_entry(pos, &evsel_list->entries, node) {
|
|
for (thread = 0;
|
|
thread < threads->nr;
|
|
thread++)
|
|
ioctl(FD(pos, i, thread),
|
|
PERF_EVENT_IOC_DISABLE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (quiet || signr == SIGUSR1)
|
|
return 0;
|
|
|
|
fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
|
|
|
|
/*
|
|
* Approximate RIP event size: 24 bytes.
|
|
*/
|
|
fprintf(stderr,
|
|
"[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n",
|
|
(double)bytes_written / 1024.0 / 1024.0,
|
|
output_name,
|
|
bytes_written / 24);
|
|
|
|
return 0;
|
|
|
|
out_delete_session:
|
|
perf_session__delete(session);
|
|
return err;
|
|
}
|
|
|
|
static const char * const record_usage[] = {
|
|
"perf record [<options>] [<command>]",
|
|
"perf record [<options>] -- <command> [<options>]",
|
|
NULL
|
|
};
|
|
|
|
static bool force, append_file;
|
|
|
|
const struct option record_options[] = {
|
|
OPT_CALLBACK('e', "event", &evsel_list, "event",
|
|
"event selector. use 'perf list' to list available events",
|
|
parse_events),
|
|
OPT_CALLBACK(0, "filter", &evsel_list, "filter",
|
|
"event filter", parse_filter),
|
|
OPT_INTEGER('p', "pid", &target_pid,
|
|
"record events on existing process id"),
|
|
OPT_INTEGER('t', "tid", &target_tid,
|
|
"record events on existing thread id"),
|
|
OPT_INTEGER('r', "realtime", &realtime_prio,
|
|
"collect data with this RT SCHED_FIFO priority"),
|
|
OPT_BOOLEAN('D', "no-delay", &nodelay,
|
|
"collect data without buffering"),
|
|
OPT_BOOLEAN('R', "raw-samples", &raw_samples,
|
|
"collect raw sample records from all opened counters"),
|
|
OPT_BOOLEAN('a', "all-cpus", &system_wide,
|
|
"system-wide collection from all CPUs"),
|
|
OPT_BOOLEAN('A', "append", &append_file,
|
|
"append to the output file to do incremental profiling"),
|
|
OPT_STRING('C', "cpu", &cpu_list, "cpu",
|
|
"list of cpus to monitor"),
|
|
OPT_BOOLEAN('f', "force", &force,
|
|
"overwrite existing data file (deprecated)"),
|
|
OPT_U64('c', "count", &user_interval, "event period to sample"),
|
|
OPT_STRING('o', "output", &output_name, "file",
|
|
"output file name"),
|
|
OPT_BOOLEAN('i', "no-inherit", &no_inherit,
|
|
"child tasks do not inherit counters"),
|
|
OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"),
|
|
OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
|
|
OPT_BOOLEAN('g', "call-graph", &call_graph,
|
|
"do call-graph (stack chain/backtrace) recording"),
|
|
OPT_INCR('v', "verbose", &verbose,
|
|
"be more verbose (show counter open errors, etc)"),
|
|
OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
|
|
OPT_BOOLEAN('s', "stat", &inherit_stat,
|
|
"per thread counts"),
|
|
OPT_BOOLEAN('d', "data", &sample_address,
|
|
"Sample addresses"),
|
|
OPT_BOOLEAN('T', "timestamp", &sample_time, "Sample timestamps"),
|
|
OPT_BOOLEAN('n', "no-samples", &no_samples,
|
|
"don't sample"),
|
|
OPT_BOOLEAN('N', "no-buildid-cache", &no_buildid_cache,
|
|
"do not update the buildid cache"),
|
|
OPT_BOOLEAN('B', "no-buildid", &no_buildid,
|
|
"do not collect buildids in perf.data"),
|
|
OPT_END()
|
|
};
|
|
|
|
int cmd_record(int argc, const char **argv, const char *prefix __used)
|
|
{
|
|
int err = -ENOMEM;
|
|
struct perf_evsel *pos;
|
|
|
|
evsel_list = perf_evlist__new();
|
|
if (evsel_list == NULL)
|
|
return -ENOMEM;
|
|
|
|
argc = parse_options(argc, argv, record_options, record_usage,
|
|
PARSE_OPT_STOP_AT_NON_OPTION);
|
|
if (!argc && target_pid == -1 && target_tid == -1 &&
|
|
!system_wide && !cpu_list)
|
|
usage_with_options(record_usage, record_options);
|
|
|
|
if (force && append_file) {
|
|
fprintf(stderr, "Can't overwrite and append at the same time."
|
|
" You need to choose between -f and -A");
|
|
usage_with_options(record_usage, record_options);
|
|
} else if (append_file) {
|
|
write_mode = WRITE_APPEND;
|
|
} else {
|
|
write_mode = WRITE_FORCE;
|
|
}
|
|
|
|
symbol__init();
|
|
|
|
if (no_buildid_cache || no_buildid)
|
|
disable_buildid_cache();
|
|
|
|
if (evsel_list->nr_entries == 0 &&
|
|
perf_evlist__add_default(evsel_list) < 0) {
|
|
pr_err("Not enough memory for event selector list\n");
|
|
goto out_symbol_exit;
|
|
}
|
|
|
|
if (target_pid != -1)
|
|
target_tid = target_pid;
|
|
|
|
threads = thread_map__new(target_pid, target_tid);
|
|
if (threads == NULL) {
|
|
pr_err("Problems finding threads of monitor\n");
|
|
usage_with_options(record_usage, record_options);
|
|
}
|
|
|
|
if (target_tid != -1)
|
|
cpus = cpu_map__dummy_new();
|
|
else
|
|
cpus = cpu_map__new(cpu_list);
|
|
|
|
if (cpus == NULL)
|
|
usage_with_options(record_usage, record_options);
|
|
|
|
list_for_each_entry(pos, &evsel_list->entries, node) {
|
|
if (perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
|
|
goto out_free_fd;
|
|
if (perf_header__push_event(pos->attr.config, event_name(pos)))
|
|
goto out_free_fd;
|
|
}
|
|
|
|
if (perf_evlist__alloc_pollfd(evsel_list, cpus->nr, threads->nr) < 0)
|
|
goto out_free_fd;
|
|
|
|
if (user_interval != ULLONG_MAX)
|
|
default_interval = user_interval;
|
|
if (user_freq != UINT_MAX)
|
|
freq = user_freq;
|
|
|
|
/*
|
|
* User specified count overrides default frequency.
|
|
*/
|
|
if (default_interval)
|
|
freq = 0;
|
|
else if (freq) {
|
|
default_interval = freq;
|
|
} else {
|
|
fprintf(stderr, "frequency and count are zero, aborting\n");
|
|
err = -EINVAL;
|
|
goto out_free_fd;
|
|
}
|
|
|
|
err = __cmd_record(argc, argv);
|
|
|
|
out_free_fd:
|
|
thread_map__delete(threads);
|
|
threads = NULL;
|
|
out_symbol_exit:
|
|
symbol__exit();
|
|
return err;
|
|
}
|