linux-kernel - Re: [PATCH 1/3] perf sched timehist: Mark schedule function in callchains

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Date:   Wed, 23 Nov 2016 22:13:46 -0500
From:   David Ahern <dsahern@...il.com>
To:     Namhyung Kim <namhyung@...nel.org>,
        Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Jiri Olsa <jolsa@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Stephane Eranian <eranian@...gle.com>,
        Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH 1/3] perf sched timehist: Mark schedule function in
 callchains

On 11/23/16 8:11 PM, Namhyung Kim wrote:
> The sched_switch event always captured from the scheduler function.  So
> it'd be great omit them from the callchain.  This patch marks the
> functions to be omitted by later patch.

I had this covered by a symbol filter:

https://github.com/dsahern/linux/blob/perf/full-monty-4.1/tools/perf/builtin-sched.c#L3000

Not sure what happened over the years but that should still work and allows the user to add more symbols to ignore:

https://github.com/dsahern/linux/blob/perf/full-monty-4.1/tools/perf/builtin-sched.c#L3449