linux-kernel - Re: [PATCH] perf: fix assertion failure in x86_pmu

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Date:	Tue, 07 Feb 2012 11:25:22 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Stephane Eranian <eranian@...gle.com>,
	linux-kernel@...r.kernel.org, peterz@...radead.org,
	markus@...ppelsdorf.de, paulus@...ba.org
Subject: Re: [PATCH] perf: fix assertion failure in x86_pmu_start()

Le mardi 07 février 2012 à 09:41 +0100, Ingo Molnar a écrit :

> Were these messages introduced by:
> 
>  e050e3f0a71b: perf: Fix broken interrupt rate throttling
> 
> as well?
> 
> In any case I'm holding off on applying the patch before this is 
> resolved.

Reverting e050e3f0a71b solves all my problems, no more warnings.

$ perf record -a -g hackbench 10 thread 4000
Running with 10*40 (== 400) tasks.
Time: 13.181
[ perf record: Woken up 59 times to write data ]
[ perf record: Captured and wrote 16.874 MB perf.data (~737228 samples)
]

$ perf record -a -g hackbench 10 thread 4000
Running with 10*40 (== 400) tasks.
Time: 13.124
[ perf record: Woken up 61 times to write data ]
[ perf record: Captured and wrote 16.533 MB perf.data (~722349 samples)
]


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