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SubjectRe: [PATCH RFC] hist lookups
Hello David,

On Sun, Nov 18, 2018 at 08:52:43PM -0800, David Miller wrote:
> From: Jiri Olsa <>
> 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.

Did you record callchains as well? I'd like to know whether it's
related to the children (cumulative) mode or not.


> 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.

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