From: Milian Wolff <milian.wolff@kdab.com>
To: linux-perf-users@vger.kernel.org
Subject: Does perf randomize the sampling period?
Date: Wed, 09 Sep 2015 17:11:13 +0200 [thread overview]
Message-ID: <1769534.mDAXVEGQ5L@milian-kdab2> (raw)
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Hey all,
does perf randomize its sampling intervals/period to prevent pattern effects?
I found https://lkml.org/lkml/2010/3/4/51 but neither the man page on perf
record says anything on that matter, nor does the perf wiki say it's
supported:
https://perf.wiki.kernel.org/index.php/Tutorial#Period_and_rate
> There is currently no support for sampling period randomization.
So is it supported, or not? If it is supported, how do I enable it? Or is this
enabled by default?
If it is not supported, why so? Is it not important to have?
Thanks
--
Milian Wolff | milian.wolff@kdab.com | Software Engineer
KDAB (Deutschland) GmbH&Co KG, a KDAB Group company
Tel: +49-30-521325470
KDAB - The Qt Experts
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next reply other threads:[~2015-09-09 15:11 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-09 15:11 Milian Wolff [this message]
2015-09-09 15:16 ` Does perf randomize the sampling period? Manuel Selva
2015-09-09 15:24 ` Andreas Hollmann
2015-09-10 15:48 ` Andi Kleen
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