![Arnaldo Carvalho de Melo](/assets/img/avatar_default.png)
By creating an perf_evlist out of the attributes in the perf.data file header, so that we can use evlists and evsels when reading recorded sessions in addition to when we record sessions. More work is needed to allow tools to allow the user to select which events are wanted when browsing sessions, be it just one or a subset of them, aggregated or showed at the same time but with different indications on the UI to allow seeing workloads thru different views at the same time. But the overall goal/trend is to more uniformly use evsels and evlists. 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>
510 lines
14 KiB
C
510 lines
14 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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{
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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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struct perf_evsel *evsel;
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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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evsel = perf_evlist__id2evsel(session->evlist, sample->id);
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if (evsel == NULL) {
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/*
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* FIXME: Propagate this back, but at least we're in a builtin,
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* where exit() is allowed. ;-)
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*/
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ui__warning("Invalid %s file, contains samples with id not in "
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"its header!\n", input_name);
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exit_browser(0);
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exit(1);
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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_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)) {
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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 hists__tty_browse_tree(struct perf_evlist *evlist, 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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hists__tui_browse_tree(session->evlist, help);
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else
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hists__tty_browse_tree(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
|
|
symbol_conf.exclude_other = false;
|
|
|
|
/*
|
|
* Any (unrecognized) arguments left?
|
|
*/
|
|
if (argc)
|
|
usage_with_options(report_usage, options);
|
|
|
|
sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
|
|
sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
|
|
sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
|
|
|
|
return __cmd_report();
|
|
}
|