On Fri, 2010-08-13 at 11:32 +0800, Julien Cristau wrote: > On Thu, Aug 12, 2010 at 09:47:23 +0800, ykzhao wrote: > > > when playing flash h.264 cif video workload, the cpu C0 usage is reduced > > from 43% to 42% while the video quality is not affected. > > > Is 43% vs 42% a really significant win? How close is it to measurement > noise?
The purpose of using CLOCK_MONOTONIC_COARSE posix timer is to reduce the overhead of read_hpet. Yes. The 1% ratio seems tiny. But the tiny ratio is related with that the total overhead of read_hpet is not very high on the CPU usage(about 3%) when playing the video workload. In such case it is not easy to get one higher improvement. > > Cheers, > Julien _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel
