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From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Jan Kiszka <jan.kiszka@siemens.com>, Xenomai <xenomai@xenomai.org>
Subject: [Xenomai] perf nmi on x86
Date: Mon, 24 Aug 2015 20:14:26 +0200	[thread overview]
Message-ID: <20150824181426.GA21893@hermes.click-hack.org> (raw)

Hi Jan,

running Xenomai on an x86 machine, I noticed that the perf NMI was
ticking. It seems CONFIG_PERF can not be disabled in the kernel
configuration.

So, the first question is: 
is there a way of disabling the NMI ?
second question is: 
if not, what do we do about it? 

I mean, on the one hand, disabling the NMI is probably mandatory on
a system where latency matters, but on the other hand, some users
may want it enabled and do not care for the additional latency.

Regards.

-- 
					    Gilles.
https://click-hack.org


             reply	other threads:[~2015-08-24 18:14 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-08-24 18:14 Gilles Chanteperdrix [this message]
2015-08-24 18:24 ` [Xenomai] perf nmi on x86 Jan Kiszka
2015-08-24 18:36   ` Gilles Chanteperdrix

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