linux-kernel - Re: [PATCH 03/14] perf/x86: output multiplexing overhead

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Message-ID: <20161123200633.GY3092@twins.programming.kicks-ass.net>
Date:   Wed, 23 Nov 2016 21:06:33 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     kan.liang@...el.com
Cc:     mingo@...hat.com, acme@...nel.org, linux-kernel@...r.kernel.org,
        alexander.shishkin@...ux.intel.com, tglx@...utronix.de,
        namhyung@...nel.org, jolsa@...nel.org, adrian.hunter@...el.com,
        wangnan0@...wei.com, mark.rutland@....com, andi@...stfloor.org
Subject: Re: [PATCH 03/14] perf/x86: output multiplexing overhead

On Wed, Nov 23, 2016 at 04:44:41AM -0500, kan.liang@...el.com wrote:
> From: Kan Liang <kan.liang@...el.com>
> 
> Multiplexing overhead is one of the key overhead when the number of
> events is more than available counters.
> 
> Signed-off-by: Kan Liang <kan.liang@...el.com>
> ---
>  include/linux/perf_event.h      |  2 ++
>  include/uapi/linux/perf_event.h |  1 +
>  kernel/events/core.c            | 16 ++++++++++++++++
>  3 files changed, 19 insertions(+)

The subject says x86 specific, but its _all_ core code.