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perf timechart: Adjust perf timechart to the new power events

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builtin-timechart must only pass -e power:xy events if they are supported by
the running kernel, otherwise try to fetch the old power:power{start,end}
events.

For this I added the tiny helper function:

   int is_valid_tracepoint(const char *event_string)

to parse-events.[hc], which could be more generic as an interface and support
hardware/software/... events, not only tracepoints, but someone else could
extend that if needed...

Signed-off-by: Thomas Renninger <trenn@suse.de>
Acked-by: Arjan van de Ven <arjan@linux.intel.com>
Acked-by: Jean Pihet <j-pihet@ti.com>
LKML-Reference: <1294073445-14812-4-git-send-email-trenn@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Renninger 2011-01-03 17:50:45 +01:00 • committed by Ingo Molnar
parent 25e41933b5
commit 20c457b858
3 changed files with 118 additions and 18 deletions
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41
tools/perf/util/parse-events.c
View file

@ -912,6 +912,47 @@ static void print_tracepoint_events(void)
closedir(sys_dir);
}
/*
* Check whether event is in <debugfs_mount_point>/tracing/events
*/
int is_valid_tracepoint(const char *event_string)
{
DIR *sys_dir, *evt_dir;
struct dirent *sys_next, *evt_next, sys_dirent, evt_dirent;
char evt_path[MAXPATHLEN];
char dir_path[MAXPATHLEN];
if (debugfs_valid_mountpoint(debugfs_path))
return 0;
sys_dir = opendir(debugfs_path);
if (!sys_dir)
return 0;
for_each_subsystem(sys_dir, sys_dirent, sys_next) {
snprintf(dir_path, MAXPATHLEN, "%s/%s", debugfs_path,
sys_dirent.d_name);
evt_dir = opendir(dir_path);
if (!evt_dir)
continue;
for_each_event(sys_dirent, evt_dir, evt_dirent, evt_next) {
snprintf(evt_path, MAXPATHLEN, "%s:%s",
sys_dirent.d_name, evt_dirent.d_name);
if (!strcmp(evt_path, event_string)) {
closedir(evt_dir);
closedir(sys_dir);
return 1;
}
}
closedir(evt_dir);
}
closedir(sys_dir);
return 0;
}
/*
* Print the help text for the event symbols:
*/