linux-kernel - Re: [PATCHSET v2 0/7] perf inject: Speed build-id injection

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Date:   Thu, 24 Sep 2020 15:35:03 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Ian Rogers <irogers@...gle.com>
Subject: Re: [PATCHSET v2 0/7] perf inject: Speed build-id injection

On Wed, Sep 23, 2020 at 05:05:30PM +0900, Namhyung Kim wrote:
> Hello,
> 
> This is my second attempt to speed up build-id injection.  As this is
> to improve performance, I've added a benchmark for it.  Please look at
> the usage in the first commit.
> 
> By default, it measures average processing time of 100 MMAP2 events
> and 10000 SAMPLE events.  Below is the current result on my laptop.
> 
>   $ perf bench internals inject-build-id
>   # Running 'internals/inject-build-id' benchmark:
>     Average build-id injection took: 22.997 msec (+- 0.067 msec)
>     Average time per event: 2.255 usec (+- 0.007 usec)
> 
> With this patchset applied, it got this:
> 
>   $ perf bench internals inject-build-id
>   # Running 'internals/inject-build-id' benchmark:
>     Average build-id injection took: 18.441 msec (+- 0.106 msec)
>     Average time per event: 1.808 usec (+- 0.010 usec)
>     Average build-id-all injection took: 13.451 msec (+- 0.132 msec)
>     Average time per event: 1.319 usec (+- 0.013 usec)

nice, I can see that speed up as well

Acked-by: Jiri Olsa <jolsa@...hat.com>

thanks,
jirka