perf sched: Implement the 'perf sched record' subcommand
Implement the 'perf sched record' subcommand that adds a default list of events, turns on raw sampling and system-wide tracing and passes off the rest of the command to perf record. This is more convenient than having to specify the events all the time. Before: $ perf record -a -R -e sched:sched_switch:r -e sched:sched_stat_wait:r -e sched:sched_stat_sleep:r -e sched:sched_stat_iowait:r -e sched:sched_process_exit:r -e sched:sched_process_fork:r -e sched:sched_wakeup:r -e sched:sched_migrate_task:r -c 1 sleep 1 After: $ perf sched record -f sleep 1 Also fix an assumption in the event string parser that assumed that strings passed in can be modified. (In this case they wont be as they come from a readonly constant section.) Signed-off-by: Ingo Molnar <mingo@elte.hu>
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@ -1656,6 +1656,40 @@ static void setup_sorting(void)
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sort_dimension__add((char *)"pid", &cmp_pid);
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}
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static const char *record_args[] = {
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"record",
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"-a",
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"-R",
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"-c", "1",
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"-e", "sched:sched_switch:r",
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"-e", "sched:sched_stat_wait:r",
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"-e", "sched:sched_stat_sleep:r",
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"-e", "sched:sched_stat_iowait:r",
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"-e", "sched:sched_process_exit:r",
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"-e", "sched:sched_process_fork:r",
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"-e", "sched:sched_wakeup:r",
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"-e", "sched:sched_migrate_task:r",
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};
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static int __cmd_record(int argc, const char **argv)
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{
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unsigned int rec_argc, i, j;
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const char **rec_argv;
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rec_argc = ARRAY_SIZE(record_args) + argc - 1;
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rec_argv = calloc(rec_argc + 1, sizeof(char *));
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for (i = 0; i < ARRAY_SIZE(record_args); i++)
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rec_argv[i] = strdup(record_args[i]);
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for (j = 1; j < (unsigned int)argc; j++, i++)
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rec_argv[i] = argv[j];
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BUG_ON(i != rec_argc);
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return cmd_record(i, rec_argv, NULL);
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}
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int cmd_sched(int argc, const char **argv, const char *prefix __used)
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{
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symbol__init();
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@ -1666,7 +1700,9 @@ int cmd_sched(int argc, const char **argv, const char *prefix __used)
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if (!argc)
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usage_with_options(sched_usage, sched_options);
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if (!strncmp(argv[0], "lat", 3)) {
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if (!strncmp(argv[0], "rec", 3)) {
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return __cmd_record(argc, argv);
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} else if (!strncmp(argv[0], "lat", 3)) {
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trace_handler = &lat_ops;
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if (argc > 1) {
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argc = parse_options(argc, argv, latency_options, latency_usage, 0);
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@ -1687,6 +1723,5 @@ int cmd_sched(int argc, const char **argv, const char *prefix __used)
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usage_with_options(sched_usage, sched_options);
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}
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return 0;
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}
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@ -525,7 +525,8 @@ static enum event_result parse_tracepoint_event(const char **strp,
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flags = strchr(evt_name, ':');
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if (flags) {
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*flags = '\0';
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/* split it out: */
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evt_name = strndup(evt_name, flags - evt_name);
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flags++;
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}
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