linux-kernel - Re: "perf: interrupt took too long" messages even with perf_cpu_time_max

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Message-ID: <20160402163334.GT3448@twins.programming.kicks-ass.net>
Date:	Sat, 2 Apr 2016 18:33:34 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Markus Trippelsdorf <markus@...ppelsdorf.de>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: Re: "perf: interrupt took too long" messages even with
 perf_cpu_time_max_percent==0

On Sat, Apr 02, 2016 at 01:17:26PM +0200, Markus Trippelsdorf wrote:
> On 2016.04.02 at 13:00 +0200, Peter Zijlstra wrote:

> > Ah, was 0 also meant to disable it?
> 
> Yes. From Documentation/sysctl/kernel.txt:

Oh wow, we have documentation on this! Learn something new every day :-)