linux-kernel - Re: perf: stalls in perf_install_in_context/perf_remove_from

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Message-ID: <20151215135727.GJ6357@twins.programming.kicks-ass.net>
Date:	Tue, 15 Dec 2015 14:57:27 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Dmitry Vyukov <dvyukov@...gle.com>
Cc:	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	syzkaller <syzkaller@...glegroups.com>,
	Kostya Serebryany <kcc@...gle.com>,
	Alexander Potapenko <glider@...gle.com>,
	Sasha Levin <sasha.levin@...cle.com>,
	Eric Dumazet <edumazet@...gle.com>
Subject: Re: perf: stalls in perf_install_in_context/perf_remove_from_context

On Tue, Dec 15, 2015 at 02:44:43PM +0100, Dmitry Vyukov wrote:
> Note that the test uses cpu%4 because I have 4 cpus. Here is how I
> start qemu: -numa node,nodeid=0,cpus=0-1 -numa node,nodeid=1,cpus=2-3
> -smp sockets=2,cores=2,threads=1

I'll first try on real hardware. I distrust this virt muck :-)
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