Re: [Powertop] [PATCH] Fix timer and work perf events timestamp tracing

Incorrect timer and work perf events timestamp tracing is one of the reason for reporting usage over 100%. This patch will resolve the issue by - rejecting the events for which entry timestamp is not recorded.

Currently these events exit timestamp itself is considered as usage period resulting in over 100% usage. - clearing event timestamps from global map at the end of each measurement to avoid collision with earlier recorded timestamps. Signed-off-by: Rajagopal Venkat <rajagopal.venkat(a)linaro.org&gt; --- src/process/timer.cpp | 5 ++++- src/process/work.cpp | 5 ++++- 2 files changed, 8 insertions(+), 2 deletions(-) diff --git a/src/process/timer.cpp b/src/process/timer.cpp index 8917490..db074c4 100644 --- a/src/process/timer.cpp +++ b/src/process/timer.cpp @@ -79,7 +79,8 @@ uint64_t timer::done(uint64_t time, uint64_t timer_struct) { int64_t delta; - if (running_since[timer_struct] > time) + if (running_since.find(timer_struct) == running_since.end() || + running_since[timer_struct] > time) return 0; delta = time - running_since[timer_struct]; @@ -147,6 +148,8 @@ void clear_timers(void) all_timers.erase(it); it = all_timers.begin(); } + + running_since.clear(); } bool timer::is_deferred(void) diff --git a/src/process/work.cpp b/src/process/work.cpp index 82f13a2..e436643 100644 --- a/src/process/work.cpp +++ b/src/process/work.cpp @@ -56,7 +56,8 @@ uint64_t work::done(uint64_t time, uint64_t work_struct) { int64_t delta; - if (running_since[work_struct] > time) + if (running_since.find(work_struct) == running_since.end() || + running_since[work_struct] > time) return 0; delta = time - running_since[work_struct]; @@ -102,6 +103,8 @@ void clear_work(void) all_work.erase(it); it = all_work.begin(); } + + running_since.clear(); } -- 1.7.11.3 _______________________________________________ PowerTop mailing list PowerTop(a)lists.01.org https://lists.01.org/mailman/listinfo/powertop