diff options
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/Documentation/perf-script.txt | 4 | ||||
| -rw-r--r-- | tools/perf/builtin-script.c | 59 |
2 files changed, 62 insertions, 1 deletions
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt index 25e677344728..2811fcf684cb 100644 --- a/tools/perf/Documentation/perf-script.txt +++ b/tools/perf/Documentation/perf-script.txt @@ -325,6 +325,10 @@ include::itrace.txt[] Set the maximum number of program blocks to print with brstackasm for each sample. +--per-event-dump:: + Create per event files with a "perf.data.EVENT.dump" name instead of + printing to stdout, useful, for instance, for generating flamegraphs. + --inline:: If a callgraph address belongs to an inlined function, the inline stack will be printed. Each entry has function name and file/line. Enabled by diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c index b27f21638207..fb5e49b3bc44 100644 --- a/tools/perf/builtin-script.c +++ b/tools/perf/builtin-script.c @@ -1392,6 +1392,7 @@ struct perf_script { bool show_switch_events; bool show_namespace_events; bool allocated; + bool per_event_dump; struct cpu_map *cpus; struct thread_map *threads; int name_width; @@ -1438,7 +1439,7 @@ static void process_event(struct perf_script *script, struct thread *thread = al->thread; struct perf_event_attr *attr = &evsel->attr; unsigned int type = output_type(attr->type); - FILE *fp = stdout; + FILE *fp = evsel->priv; if (output[type].fields == 0) return; @@ -1887,6 +1888,52 @@ static void sig_handler(int sig __maybe_unused) session_done = 1; } +static void perf_script__fclose_per_event_dump(struct perf_script *script) +{ + struct perf_evlist *evlist = script->session->evlist; + struct perf_evsel *evsel; + + evlist__for_each_entry(evlist, evsel) { + if (!evsel->priv) + break; + fclose(evsel->priv); + evsel->priv = NULL; + } +} + +static int perf_script__fopen_per_event_dump(struct perf_script *script) +{ + struct perf_evsel *evsel; + + evlist__for_each_entry(script->session->evlist, evsel) { + char filename[PATH_MAX]; + snprintf(filename, sizeof(filename), "%s.%s.dump", + script->session->file->path, perf_evsel__name(evsel)); + evsel->priv = fopen(filename, "w"); + if (evsel->priv == NULL) + goto out_err_fclose; + } + + return 0; + +out_err_fclose: + perf_script__fclose_per_event_dump(script); + return -1; +} + +static int perf_script__setup_per_event_dump(struct perf_script *script) +{ + struct perf_evsel *evsel; + + if (script->per_event_dump) + return perf_script__fopen_per_event_dump(script); + + evlist__for_each_entry(script->session->evlist, evsel) + evsel->priv = stdout; + + return 0; +} + static int __cmd_script(struct perf_script *script) { int ret; @@ -1908,8 +1955,16 @@ static int __cmd_script(struct perf_script *script) if (script->show_namespace_events) script->tool.namespaces = process_namespaces_event; + if (perf_script__setup_per_event_dump(script)) { + pr_err("Couldn't create the per event dump files\n"); + return -1; + } + ret = perf_session__process_events(script->session); + if (script->per_event_dump) + perf_script__fclose_per_event_dump(script); + if (debug_mode) pr_err("Misordered timestamps: %" PRIu64 "\n", nr_unordered); @@ -2827,6 +2882,8 @@ int cmd_script(int argc, const char **argv) "Show context switch events (if recorded)"), OPT_BOOLEAN('\0', "show-namespace-events", &script.show_namespace_events, "Show namespace events (if recorded)"), + OPT_BOOLEAN('\0', "per-event-dump", &script.per_event_dump, + "Dump trace output to files named by the monitored events"), OPT_BOOLEAN('f', "force", &symbol_conf.force, "don't complain, do it"), OPT_INTEGER(0, "max-blocks", &max_blocks, "Maximum number of code blocks to dump with brstackinsn"), |