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

Hi, On (09/05/12 15:52), Rajagopal Venkat wrote: > 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. how is that possible? do you mean erasing between measurements? schematically: measure0: ev1.start ev2.start ev2.end processing clear measure1: ev3.start ev1.end <<<<<

ev3.end processing clear if so, then we're loosing events, which is no good. reporting less than 100% is ok, but reporting less than real is not.

p.s. I'll try to check emails, but most probably will be off-line most of the day. -ss > 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 >