From: Andi Kleen <andi@firstfloor.org>
To: Milian Wolff <milian.wolff@kdab.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: Does perf randomize the sampling period?
Date: Thu, 10 Sep 2015 08:48:49 -0700 [thread overview]
Message-ID: <87r3m68ece.fsf@tassilo.jf.intel.com> (raw)
In-Reply-To: <1769534.mDAXVEGQ5L@milian-kdab2> (Milian Wolff's message of "Wed, 09 Sep 2015 17:11:13 +0200")
Milian Wolff <milian.wolff@kdab.com> writes:
> Hey all,
>
> does perf randomize its sampling intervals/period to prevent pattern
> effects?
It does not.
Usually you can get most of the benefits of randomization by using a
prime period with -c.
-Andi
--
ak@linux.intel.com -- Speaking for myself only
prev parent reply other threads:[~2015-09-10 15:49 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-09 15:11 Does perf randomize the sampling period? Milian Wolff
2015-09-09 15:16 ` Manuel Selva
2015-09-09 15:24 ` Andreas Hollmann
2015-09-10 15:48 ` Andi Kleen [this message]
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