Re: [PATCH v6 0/2] sched: Optionally skip uclamp logic in fast path

[Qais Yousef]

On 07/07/20 14:29, Vincent Guittot wrote:
> On Mon, 6 Jul 2020 at 12:41, Qais Yousef <qais.yousef@xxxxxxx> wrote:
> >
> > On 07/03/20 14:09, Vincent Guittot wrote:
> > > I have run the perf bench sched pipe that have have already run
> > > previously with this v6 and the results are similar to my previous
> > > tests:
> > > The impact is -1.61% similarly to v2 which is better compared the
> > > original -3.66% without your patch
> >
> > Thanks Vincent.
> >
> > Can you afford doing a capture of `perf record` and share the resulting
> > perf.dat with vmlinux (with debug symbols)?
> 
> Will try to make it by end of the week

Thanks! If you want a place to drop them let me know.

Cheers

--
Qais Yousef

> 
> >
> > Having a before/after capture would be even better.
> >
> > Not sure if we can do  much about this -1.61% in your case, but it'd be good to
> > understand why if possible. perf bench sched pipe is very sensitive to tiniest
> > of changes which could be due to binary-to-binary differences.
> >
> > Thanks
> >
> > --
> > Qais Yousef