linux-kernel - 3.11 kernel: perf samples too long (2501 > 2500), lowering kernel.perf_event_max_sample

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Message-ID: <CAO9zADxrPNA8OMLd1NEXgaTnnCoPs0FeVSz2Pf-gOPAppPZ1qw@mail.gmail.com>
Date:	Tue, 10 Sep 2013 08:26:17 -0400
From:	Justin Piszcz <jpiszcz@...idpixels.com>
To:	open list <linux-kernel@...r.kernel.org>
Subject: 3.11 kernel: perf samples too long (2501 > 2500), lowering
 kernel.perf_event_max_sample_rate to 50000

Hello,

I recent upgraded from 3.10 to 3.11 and see these on occasion in the kernel log:

perf samples too long (2501 > 2500), lowering
kernel.perf_event_max_sample_rate to 50000
perf samples too long (5040 > 5000), lowering
kernel.perf_event_max_sample_rate to 25000

I was curious what is causing this/recommendation to fix this problem?

Thanks,

Justin.
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