Re: [PATCH RFC] hist lookups

Jiri Olsa
2018-11-19T09:14:27Z

On Sun, Nov 18, 2018 at 08:52:43PM -0800, David Miller wrote:
> From: Jiri Olsa <jolsa@redhat.com>
> Date: Tue, 13 Nov 2018 11:40:54 +0100
>
> > I pushed/rebased what I have to perf/fixes branch again
> >
> > please note I had to change our compile changes, because
> > they wouldn't compile on x86, but I can't verify on sparc,
> > so you might see some compile fails again
>
> I just checked your current perf/fixes branch.
>
> It builds on Sparc ;-)
>
> And it behaves better too. I do get tons of drops and lost events,
> but it seems to keep going even during the hardest load.
>
> Eventually I end up with a lot of unresolvable histogram entries,
> so that is something to look into.
>
> I looked at your drop logic and it seems perfect, we avoid dropping
> all non-SAMPLE events which is what we want. So that can't be the
> cause of the issues I am seeing.
>

cool, I'll polish the patchset and send it out

thanks,
jirka