linux-kernel - Re: [PATCH 5/9] perf tools: Disable write_backward for leader sampling group events

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Date:   Mon, 23 Apr 2018 11:23:19 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Kan Liang <kan.liang@...el.com>,
        lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        David Ahern <dsahern@...il.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 5/9] perf tools: Disable write_backward for leader
 sampling group events

Em Mon, Apr 23, 2018 at 11:08:19AM +0200, Jiri Olsa escreveu:
> .. and other related fields that do not need to be enabled
> for events that have sampling leader.
> 
> It fixes the perf top usage Ingo reported broken:
> 
>   # perf top -e '{cycles,msr/aperf/}:S'
> 
> The msr/aperf/ is configured for write_back sampling, which
> is not allowed by msr pmu, so it fails to create the event.
> 
> Adjusting related attr test.

Applied to perf/urgent.

- Arnaldo