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perf sched: Implement the 'perf sched record' subcommand

Browse source 
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>
This commit is contained in:
Ingo Molnar 2009-09-13 09:44:29 +02:00
parent b5fae128e4
commit 1fc35b29b4
2 changed files with 39 additions and 3 deletions
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39
tools/perf/builtin-sched.c
View file

@ -1656,6 +1656,40 @@ static void setup_sorting(void)
sort_dimension__add((char *)"pid", &cmp_pid);
}
static const char *record_args[] = {
"record",
"-a",
"-R",
"-c", "1",
"-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",
};
static int __cmd_record(int argc, const char **argv)
{
unsigned int rec_argc, i, j;
const char **rec_argv;
rec_argc = ARRAY_SIZE(record_args) + argc - 1;
rec_argv = calloc(rec_argc + 1, sizeof(char *));
for (i = 0; i < ARRAY_SIZE(record_args); i++)
rec_argv[i] = strdup(record_args[i]);
for (j = 1; j < (unsigned int)argc; j++, i++)
rec_argv[i] = argv[j];
BUG_ON(i != rec_argc);
return cmd_record(i, rec_argv, NULL);
}
int cmd_sched(int argc, const char **argv, const char *prefix __used)
{
symbol__init();
@ -1666,7 +1700,9 @@ int cmd_sched(int argc, const char **argv, const char *prefix __used)
if (!argc)
usage_with_options(sched_usage, sched_options);
if (!strncmp(argv[0], "lat", 3)) {
if (!strncmp(argv[0], "rec", 3)) {
return __cmd_record(argc, argv);
} else if (!strncmp(argv[0], "lat", 3)) {
trace_handler = &lat_ops;
if (argc > 1) {
argc = parse_options(argc, argv, latency_options, latency_usage, 0);
@ -1687,6 +1723,5 @@ int cmd_sched(int argc, const char **argv, const char *prefix __used)
usage_with_options(sched_usage, sched_options);
}
return 0;
}

3
tools/perf/util/parse-events.c
View file

@ -525,7 +525,8 @@ static enum event_result parse_tracepoint_event(const char **strp,
flags = strchr(evt_name, ':');
if (flags) {
*flags = '\0';
/* split it out: */
evt_name = strndup(evt_name, flags - evt_name);
flags++;
}