linux-kernel - Re: [PATCH] perf tools: Fix time sorting

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Date:   Mon, 4 Nov 2019 16:48:54 -0800
From:   Andi Kleen <ak@...ux.intel.com>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Michael Petlan <mpetlan@...hat.com>
Subject: Re: [PATCH] perf tools: Fix time sorting

On Tue, Nov 05, 2019 at 12:27:11AM +0100, Jiri Olsa wrote:
> The final sort might get confused when the comparison
> is done over bigger numbers than int like for -s time.
> 
> Check following report for longer workloads:
>   $ perf report -s time -F time,overhead --stdio
> 
> Fixing hist_entry__sort to properly return int64_t and
> not possible cut int.
> 
> Cc: Andi Kleen <ak@...ux.intel.com>
> Link: http://lkml.kernel.org/n/tip-uetl5z1eszpubzqykvdftaq6@git.kernel.org
> Signed-off-by: Jiri Olsa <jolsa@...nel.org>

Looks good.

Reviewed-by: Andi Kleen <ak@...ux.intel.com>

-Andi