![Andi Kleen](/assets/img/avatar_default.png)
perf record has a new option -W that enables weightened sampling.
Add sorting support in top/report for the average weight per sample and the
total weight sum. This allows to both compare relative cost per event
and the total cost over the measurement period.
Add the necessary glue to perf report, record and the library.
v2: Merge with new hist refactoring.
v3: Fix manpage. Remove value check.
Rename global_weight to weight and weight to local_weight.
v4: Readd sort keys to manpage
v5: Move weight to end
v6: Move weight to template
v7: Rename weight key.
Original patch from Andi modified by Stephane Eranian <eranian@google.com>
to include ONLY the weight supporting code and apply to pristine 3.8.0-rc4.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1359040242-8269-6-git-send-email-eranian@google.com
[ committer note: changed to cope with fc5871ed
and the hists_link perf test entry ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
360 lines
9.2 KiB
C
360 lines
9.2 KiB
C
/*
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* builtin-annotate.c
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*
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* Builtin annotate 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/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 "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/annotate.h"
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#include "util/event.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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#include "util/session.h"
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#include "util/tool.h"
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#include "arch/common.h"
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#include <linux/bitmap.h>
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struct perf_annotate {
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struct perf_tool tool;
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bool force, use_tui, use_stdio, use_gtk;
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bool full_paths;
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bool print_line;
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bool skip_missing;
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const char *sym_hist_filter;
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const char *cpu_list;
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DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
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};
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static int perf_evsel__add_sample(struct perf_evsel *evsel,
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struct perf_sample *sample,
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struct addr_location *al,
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struct perf_annotate *ann)
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{
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struct hist_entry *he;
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int ret;
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if (ann->sym_hist_filter != NULL &&
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(al->sym == NULL ||
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strcmp(ann->sym_hist_filter, al->sym->name) != 0)) {
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/* We're only interested in a symbol named sym_hist_filter */
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if (al->sym != NULL) {
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rb_erase(&al->sym->rb_node,
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&al->map->dso->symbols[al->map->type]);
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symbol__delete(al->sym);
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}
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return 0;
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}
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he = __hists__add_entry(&evsel->hists, al, NULL, 1, 1);
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if (he == NULL)
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return -ENOMEM;
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ret = 0;
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if (he->ms.sym != NULL) {
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struct annotation *notes = symbol__annotation(he->ms.sym);
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if (notes->src == NULL && symbol__alloc_hist(he->ms.sym) < 0)
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return -ENOMEM;
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ret = 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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return ret;
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}
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static int process_sample_event(struct perf_tool *tool,
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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 machine *machine)
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{
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struct perf_annotate *ann = container_of(tool, struct perf_annotate, tool);
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struct addr_location al;
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if (perf_event__preprocess_sample(event, machine, &al, sample,
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symbol__annotate_init) < 0) {
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pr_warning("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 (ann->cpu_list && !test_bit(sample->cpu, ann->cpu_bitmap))
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return 0;
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if (!al.filtered && perf_evsel__add_sample(evsel, sample, &al, ann)) {
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pr_warning("problem incrementing symbol count, "
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"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 hist_entry__tty_annotate(struct hist_entry *he,
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struct perf_evsel *evsel,
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struct perf_annotate *ann)
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{
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return symbol__tty_annotate(he->ms.sym, he->ms.map, evsel,
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ann->print_line, ann->full_paths, 0, 0);
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}
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static void hists__find_annotations(struct hists *self,
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struct perf_evsel *evsel,
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struct perf_annotate *ann)
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{
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struct rb_node *nd = rb_first(&self->entries), *next;
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int key = K_RIGHT;
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while (nd) {
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struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
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struct annotation *notes;
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if (he->ms.sym == NULL || he->ms.map->dso->annotate_warned)
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goto find_next;
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notes = symbol__annotation(he->ms.sym);
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if (notes->src == NULL) {
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find_next:
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if (key == K_LEFT)
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nd = rb_prev(nd);
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else
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nd = rb_next(nd);
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continue;
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}
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if (use_browser == 2) {
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int ret;
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ret = hist_entry__gtk_annotate(he, evsel, NULL);
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if (!ret || !ann->skip_missing)
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return;
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/* skip missing symbols */
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nd = rb_next(nd);
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} else if (use_browser == 1) {
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key = hist_entry__tui_annotate(he, evsel, NULL);
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switch (key) {
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case -1:
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if (!ann->skip_missing)
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return;
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/* fall through */
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case K_RIGHT:
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next = rb_next(nd);
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break;
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case K_LEFT:
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next = rb_prev(nd);
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break;
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default:
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return;
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}
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if (next != NULL)
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nd = next;
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} else {
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hist_entry__tty_annotate(he, evsel, ann);
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nd = rb_next(nd);
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/*
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* Since we have a hist_entry per IP for the same
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* symbol, free he->ms.sym->src to signal we already
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* processed this symbol.
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*/
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free(notes->src);
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notes->src = NULL;
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}
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}
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}
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static int __cmd_annotate(struct perf_annotate *ann)
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{
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int ret;
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struct perf_session *session;
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struct perf_evsel *pos;
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u64 total_nr_samples;
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session = perf_session__new(input_name, O_RDONLY,
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ann->force, false, &ann->tool);
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if (session == NULL)
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return -ENOMEM;
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if (ann->cpu_list) {
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ret = perf_session__cpu_bitmap(session, ann->cpu_list,
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ann->cpu_bitmap);
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if (ret)
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goto out_delete;
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}
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if (!objdump_path) {
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ret = perf_session_env__lookup_objdump(&session->header.env);
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if (ret)
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goto out_delete;
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}
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ret = perf_session__process_events(session, &ann->tool);
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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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total_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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u32 nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
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if (nr_samples > 0) {
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total_nr_samples += nr_samples;
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hists__collapse_resort(hists);
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hists__output_resort(hists);
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if (symbol_conf.event_group &&
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!perf_evsel__is_group_leader(pos))
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continue;
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hists__find_annotations(hists, pos, ann);
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}
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}
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if (total_nr_samples == 0) {
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ui__error("The %s file has no samples!\n", session->filename);
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goto out_delete;
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}
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if (use_browser == 2)
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perf_gtk__show_annotations();
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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 const char * const annotate_usage[] = {
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"perf annotate [<options>]",
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NULL
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};
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int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused)
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{
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struct perf_annotate annotate = {
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.tool = {
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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_exit,
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.fork = perf_event__process_fork,
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.ordered_samples = true,
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.ordering_requires_timestamps = true,
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},
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};
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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_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('s', "symbol", &annotate.sym_hist_filter, "symbol",
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"symbol to annotate"),
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OPT_BOOLEAN('f', "force", &annotate.force, "don't complain, do it"),
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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_BOOLEAN(0, "gtk", &annotate.use_gtk, "Use the GTK interface"),
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OPT_BOOLEAN(0, "tui", &annotate.use_tui, "Use the TUI interface"),
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OPT_BOOLEAN(0, "stdio", &annotate.use_stdio, "Use the stdio interface"),
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OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
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"file", "vmlinux pathname"),
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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('l', "print-line", &annotate.print_line,
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"print matching source lines (may be slow)"),
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OPT_BOOLEAN('P', "full-paths", &annotate.full_paths,
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"Don't shorten the displayed pathnames"),
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OPT_BOOLEAN(0, "skip-missing", &annotate.skip_missing,
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"Skip symbols that cannot be annotated"),
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OPT_STRING('C', "cpu", &annotate.cpu_list, "cpu", "list of cpus to profile"),
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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_BOOLEAN(0, "source", &symbol_conf.annotate_src,
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"Interleave source code with assembly code (default)"),
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OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
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"Display raw encoding of assembly instructions (default)"),
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OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
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"Specify disassembler style (e.g. -M intel for intel syntax)"),
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OPT_STRING(0, "objdump", &objdump_path, "path",
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"objdump binary to use for disassembly and annotations"),
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OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
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"Show event group information together"),
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OPT_END()
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};
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argc = parse_options(argc, argv, options, annotate_usage, 0);
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if (annotate.use_stdio)
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use_browser = 0;
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else if (annotate.use_tui)
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use_browser = 1;
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else if (annotate.use_gtk)
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use_browser = 2;
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setup_browser(true);
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symbol_conf.priv_size = sizeof(struct annotation);
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symbol_conf.try_vmlinux_path = true;
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if (symbol__init() < 0)
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return -1;
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if (setup_sorting() < 0)
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usage_with_options(annotate_usage, options);
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if (argc) {
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/*
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* Special case: if there's an argument left then assume tha
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* it's a symbol filter:
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*/
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if (argc > 1)
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usage_with_options(annotate_usage, options);
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annotate.sym_hist_filter = argv[0];
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}
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return __cmd_annotate(&annotate);
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}
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