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

Viresh Kumar <viresh.linux at gmail.com> Wed, 05 Sep 2012 16:58:50 +0530
Newsgroups dev.linux.lists.powertop
Message-ID <CAOh2x=m_KLU9rho-DvT5sz0MW5ZRswxTuTQt2=+i4brd1OyjjA@mail.gmail.com>
On Wed, Sep 5, 2012 at 3:52 PM, Rajagopal Venkat
<rajagopal.venkat(a)linaro.org> 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.
> 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.

Tried it few times on Panda Board.

Tested-by: Viresh Kumar <viresh.kumar(a)linaro.org>