Re: [PATCH RFC] hist lookups

David Miller
2018-11-19T06:34:00Z

From: Namhyung Kim <namhyung@kernel.org>
Date: Mon, 19 Nov 2018 15:28:37 +0900

> 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.

I did not have callchains on, just plain "./perf top"