![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
Resolving the sample->id to an evsel since the most advanced tools, report and annotate, and the others will too when they evolve to properly support multi-event perf.data files. Good also because it does an extra validation, checking that the ID is valid when present. When that is not the case, the overhead is just a branch + function call (perf_evlist__id2evsel). 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>
500 lines
13 KiB
C
500 lines
13 KiB
C
/*
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* builtin-report.c
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*
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* Builtin report command: Analyze the perf.data input file,
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* look up and read DSOs and symbol information and display
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* a histogram of results, along various sorting keys.
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*/
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#include "builtin.h"
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#include "util/util.h"
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#include "util/annotate.h"
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#include "util/color.h"
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#include <linux/list.h>
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#include "util/cache.h"
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#include <linux/rbtree.h>
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#include "util/symbol.h"
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#include "util/callchain.h"
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#include "util/strlist.h"
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#include "util/values.h"
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#include "perf.h"
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#include "util/debug.h"
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#include "util/evlist.h"
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#include "util/evsel.h"
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#include "util/header.h"
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#include "util/session.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/thread.h"
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#include "util/sort.h"
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#include "util/hist.h"
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static char const *input_name = "perf.data";
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static bool force, use_tui, use_stdio;
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static bool hide_unresolved;
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static bool dont_use_callchains;
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static bool show_threads;
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static struct perf_read_values show_threads_values;
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static const char default_pretty_printing_style[] = "normal";
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static const char *pretty_printing_style = default_pretty_printing_style;
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static char callchain_default_opt[] = "fractal,0.5";
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static symbol_filter_t annotate_init;
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static int perf_session__add_hist_entry(struct perf_session *session,
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struct addr_location *al,
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struct perf_sample *sample,
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struct perf_evsel *evsel)
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{
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struct symbol *parent = NULL;
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int err = 0;
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struct hist_entry *he;
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if ((sort__has_parent || symbol_conf.use_callchain) && sample->callchain) {
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err = perf_session__resolve_callchain(session, al->thread,
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sample->callchain, &parent);
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if (err)
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return err;
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}
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he = __hists__add_entry(&evsel->hists, al, parent, sample->period);
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if (he == NULL)
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return -ENOMEM;
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if (symbol_conf.use_callchain) {
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err = callchain_append(he->callchain, &session->callchain_cursor,
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sample->period);
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if (err)
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return err;
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}
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/*
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* Only in the newt browser we are doing integrated annotation,
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* so we don't allocated the extra space needed because the stdio
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* code will not use it.
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*/
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if (al->sym != NULL && use_browser > 0) {
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struct annotation *notes = symbol__annotation(he->ms.sym);
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assert(evsel != NULL);
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err = -ENOMEM;
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if (notes->src == NULL &&
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symbol__alloc_hist(he->ms.sym, session->evlist->nr_entries) < 0)
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goto out;
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err = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
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}
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evsel->hists.stats.total_period += sample->period;
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hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
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out:
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return err;
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}
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static int process_sample_event(union perf_event *event,
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struct perf_sample *sample,
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struct perf_evsel *evsel,
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struct perf_session *session)
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{
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struct addr_location al;
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if (perf_event__preprocess_sample(event, session, &al, sample,
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annotate_init) < 0) {
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fprintf(stderr, "problem processing %d event, skipping it.\n",
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event->header.type);
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return -1;
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}
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if (al.filtered || (hide_unresolved && al.sym == NULL))
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return 0;
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if (perf_session__add_hist_entry(session, &al, sample, evsel)) {
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pr_debug("problem incrementing symbol period, skipping event\n");
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return -1;
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}
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return 0;
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}
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static int process_read_event(union perf_event *event,
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struct perf_sample *sample __used,
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struct perf_session *session)
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{
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struct perf_evsel *evsel = perf_evlist__id2evsel(session->evlist,
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event->read.id);
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if (show_threads) {
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const char *name = evsel ? event_name(evsel) : "unknown";
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perf_read_values_add_value(&show_threads_values,
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event->read.pid, event->read.tid,
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event->read.id,
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name,
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event->read.value);
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}
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dump_printf(": %d %d %s %" PRIu64 "\n", event->read.pid, event->read.tid,
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evsel ? event_name(evsel) : "FAIL",
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event->read.value);
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return 0;
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}
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static int perf_session__setup_sample_type(struct perf_session *self)
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{
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if (!(self->sample_type & PERF_SAMPLE_CALLCHAIN)) {
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if (sort__has_parent) {
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fprintf(stderr, "selected --sort parent, but no"
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" callchain data. Did you call"
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" perf record without -g?\n");
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return -EINVAL;
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}
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if (symbol_conf.use_callchain) {
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fprintf(stderr, "selected -g but no callchain data."
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" Did you call perf record without"
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" -g?\n");
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return -1;
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}
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} else if (!dont_use_callchains && callchain_param.mode != CHAIN_NONE &&
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!symbol_conf.use_callchain) {
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symbol_conf.use_callchain = true;
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if (callchain_register_param(&callchain_param) < 0) {
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fprintf(stderr, "Can't register callchain"
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" params\n");
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return -EINVAL;
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}
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}
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return 0;
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}
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static struct perf_event_ops event_ops = {
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.sample = process_sample_event,
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.mmap = perf_event__process_mmap,
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.comm = perf_event__process_comm,
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.exit = perf_event__process_task,
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.fork = perf_event__process_task,
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.lost = perf_event__process_lost,
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.read = process_read_event,
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.attr = perf_event__process_attr,
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.event_type = perf_event__process_event_type,
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.tracing_data = perf_event__process_tracing_data,
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.build_id = perf_event__process_build_id,
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.ordered_samples = true,
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.ordering_requires_timestamps = true,
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};
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extern volatile int session_done;
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static void sig_handler(int sig __used)
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{
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session_done = 1;
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}
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static size_t hists__fprintf_nr_sample_events(struct hists *self,
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const char *evname, FILE *fp)
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{
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size_t ret;
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char unit;
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unsigned long nr_events = self->stats.nr_events[PERF_RECORD_SAMPLE];
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nr_events = convert_unit(nr_events, &unit);
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ret = fprintf(fp, "# Events: %lu%c", nr_events, unit);
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if (evname != NULL)
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ret += fprintf(fp, " %s", evname);
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return ret + fprintf(fp, "\n#\n");
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}
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static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist,
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const char *help)
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{
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struct perf_evsel *pos;
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list_for_each_entry(pos, &evlist->entries, node) {
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struct hists *hists = &pos->hists;
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const char *evname = NULL;
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if (rb_first(&hists->entries) != rb_last(&hists->entries))
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evname = event_name(pos);
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hists__fprintf_nr_sample_events(hists, evname, stdout);
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hists__fprintf(hists, NULL, false, stdout);
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fprintf(stdout, "\n\n");
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}
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if (sort_order == default_sort_order &&
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parent_pattern == default_parent_pattern) {
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fprintf(stdout, "#\n# (%s)\n#\n", help);
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if (show_threads) {
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bool style = !strcmp(pretty_printing_style, "raw");
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perf_read_values_display(stdout, &show_threads_values,
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style);
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perf_read_values_destroy(&show_threads_values);
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}
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}
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return 0;
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}
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static int __cmd_report(void)
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{
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int ret = -EINVAL;
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u64 nr_samples;
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struct perf_session *session;
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struct perf_evsel *pos;
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const char *help = "For a higher level overview, try: perf report --sort comm,dso";
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signal(SIGINT, sig_handler);
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session = perf_session__new(input_name, O_RDONLY, force, false, &event_ops);
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if (session == NULL)
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return -ENOMEM;
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if (show_threads)
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perf_read_values_init(&show_threads_values);
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ret = perf_session__setup_sample_type(session);
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if (ret)
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goto out_delete;
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ret = perf_session__process_events(session, &event_ops);
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if (ret)
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goto out_delete;
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if (dump_trace) {
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perf_session__fprintf_nr_events(session, stdout);
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goto out_delete;
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}
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if (verbose > 3)
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perf_session__fprintf(session, stdout);
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if (verbose > 2)
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perf_session__fprintf_dsos(session, stdout);
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nr_samples = 0;
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list_for_each_entry(pos, &session->evlist->entries, node) {
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struct hists *hists = &pos->hists;
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hists__collapse_resort(hists);
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hists__output_resort(hists);
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nr_samples += hists->stats.nr_events[PERF_RECORD_SAMPLE];
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}
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if (nr_samples == 0) {
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ui__warning("The %s file has no samples!\n", input_name);
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goto out_delete;
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}
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if (use_browser > 0)
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perf_evlist__tui_browse_hists(session->evlist, help);
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else
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perf_evlist__tty_browse_hists(session->evlist, help);
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out_delete:
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/*
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* Speed up the exit process, for large files this can
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* take quite a while.
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*
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* XXX Enable this when using valgrind or if we ever
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* librarize this command.
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*
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* Also experiment with obstacks to see how much speed
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* up we'll get here.
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*
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* perf_session__delete(session);
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*/
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return ret;
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}
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static int
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parse_callchain_opt(const struct option *opt __used, const char *arg,
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int unset)
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{
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char *tok, *tok2;
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char *endptr;
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/*
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* --no-call-graph
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*/
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if (unset) {
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dont_use_callchains = true;
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return 0;
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}
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symbol_conf.use_callchain = true;
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if (!arg)
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return 0;
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tok = strtok((char *)arg, ",");
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if (!tok)
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return -1;
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/* get the output mode */
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if (!strncmp(tok, "graph", strlen(arg)))
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callchain_param.mode = CHAIN_GRAPH_ABS;
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else if (!strncmp(tok, "flat", strlen(arg)))
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callchain_param.mode = CHAIN_FLAT;
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else if (!strncmp(tok, "fractal", strlen(arg)))
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callchain_param.mode = CHAIN_GRAPH_REL;
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else if (!strncmp(tok, "none", strlen(arg))) {
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callchain_param.mode = CHAIN_NONE;
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symbol_conf.use_callchain = false;
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return 0;
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}
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else
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return -1;
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/* get the min percentage */
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tok = strtok(NULL, ",");
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if (!tok)
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goto setup;
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tok2 = strtok(NULL, ",");
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callchain_param.min_percent = strtod(tok, &endptr);
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if (tok == endptr)
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return -1;
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if (tok2)
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callchain_param.print_limit = strtod(tok2, &endptr);
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setup:
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if (callchain_register_param(&callchain_param) < 0) {
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fprintf(stderr, "Can't register callchain params\n");
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return -1;
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}
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return 0;
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}
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static const char * const report_usage[] = {
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"perf report [<options>] <command>",
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NULL
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};
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static const struct option options[] = {
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OPT_STRING('i', "input", &input_name, "file",
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"input file name"),
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OPT_INCR('v', "verbose", &verbose,
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"be more verbose (show symbol address, etc)"),
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OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
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"dump raw trace in ASCII"),
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OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
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"file", "vmlinux pathname"),
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OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
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"file", "kallsyms pathname"),
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OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
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OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
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"load module symbols - WARNING: use only with -k and LIVE kernel"),
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OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
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"Show a column with the number of samples"),
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OPT_BOOLEAN('T', "threads", &show_threads,
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"Show per-thread event counters"),
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OPT_STRING(0, "pretty", &pretty_printing_style, "key",
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"pretty printing style key: normal raw"),
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OPT_BOOLEAN(0, "tui", &use_tui, "Use the TUI interface"),
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OPT_BOOLEAN(0, "stdio", &use_stdio, "Use the stdio interface"),
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OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
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"sort by key(s): pid, comm, dso, symbol, parent"),
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OPT_BOOLEAN(0, "showcpuutilization", &symbol_conf.show_cpu_utilization,
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"Show sample percentage for different cpu modes"),
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OPT_STRING('p', "parent", &parent_pattern, "regex",
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"regex filter to identify parent, see: '--sort parent'"),
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OPT_BOOLEAN('x', "exclude-other", &symbol_conf.exclude_other,
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"Only display entries with parent-match"),
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OPT_CALLBACK_DEFAULT('g', "call-graph", NULL, "output_type,min_percent",
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"Display callchains using output_type (graph, flat, fractal, or none) and min percent threshold. "
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"Default: fractal,0.5", &parse_callchain_opt, callchain_default_opt),
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OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
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"only consider symbols in these dsos"),
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OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
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"only consider symbols in these comms"),
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OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
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"only consider these symbols"),
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OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
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"width[,width...]",
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"don't try to adjust column width, use these fixed values"),
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OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
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"separator for columns, no spaces will be added between "
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"columns '.' is reserved."),
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OPT_BOOLEAN('U', "hide-unresolved", &hide_unresolved,
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"Only display entries resolved to a symbol"),
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OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
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"Look for files with symbols relative to this directory"),
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OPT_END()
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};
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int cmd_report(int argc, const char **argv, const char *prefix __used)
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{
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argc = parse_options(argc, argv, options, report_usage, 0);
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if (use_stdio)
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use_browser = 0;
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else if (use_tui)
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use_browser = 1;
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if (strcmp(input_name, "-") != 0)
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setup_browser(true);
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else
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use_browser = 0;
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/*
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* Only in the newt browser we are doing integrated annotation,
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* so don't allocate extra space that won't be used in the stdio
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* implementation.
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*/
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if (use_browser > 0) {
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symbol_conf.priv_size = sizeof(struct annotation);
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annotate_init = symbol__annotate_init;
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/*
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* For searching by name on the "Browse map details".
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* providing it only in verbose mode not to bloat too
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* much struct symbol.
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*/
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if (verbose) {
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/*
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* XXX: Need to provide a less kludgy way to ask for
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* more space per symbol, the u32 is for the index on
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* the ui browser.
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* See symbol__browser_index.
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*/
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symbol_conf.priv_size += sizeof(u32);
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symbol_conf.sort_by_name = true;
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}
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}
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if (symbol__init() < 0)
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return -1;
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setup_sorting(report_usage, options);
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if (parent_pattern != default_parent_pattern) {
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if (sort_dimension__add("parent") < 0)
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return -1;
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sort_parent.elide = 1;
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} else
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symbol_conf.exclude_other = false;
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/*
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* Any (unrecognized) arguments left?
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*/
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if (argc)
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usage_with_options(report_usage, options);
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sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
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sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
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sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
|
|
|
|
return __cmd_report();
|
|
}
|