perf timechart: Adjust perf timechart to the new power events

commit 20c457b8587bee4644d998331d9e13be82e05b4c upstream.

[This patch is part of mainline git commit 20c457b8587bee4644d9.
  This should fix:
  http://www.mail-archive.com/linux-perf-users@vger.kernel.org/msg00057.html

  The regression was introduced by git commit:
  4c21adf26f8fcf86a755b9b9f55c2e9fd241e1fb]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 9bcc38f0b706f91ca3701e440c15e3e9c8aa7bd3..b3028eb6dbe881b3862b5268952e24460c71e3b7 100644 (file)
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -502,7 +502,7 @@ static int process_sample_event(event_t *event, struct perf_session *session)
                        c_state_start(pe->cpu_id, data.time, pe->value);
 
                if (strcmp(event_str, "power:power_end") == 0)
-                       c_state_end(pe->cpu_id, data.time);
+                       c_state_end(data.cpu, data.time);
 
                if (strcmp(event_str, "power:power_frequency") == 0)
                        p_state_change(pe->cpu_id, data.time, pe->value);