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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 <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.

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

    Thanks,
    Namhyung


    >
    > 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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