From: Alexey Vlasov <renton@renton.name>
To: linux-kernel@vger.kernel.org
Subject: Kernel migration eat CPUs
Date: Thu, 22 Aug 2013 19:00:46 +0400 [thread overview]
Message-ID: <20130822150046.GF13676@beaver> (raw)
Hi,
Beginning from 3.7 including 3.10 kernel, I noticed that from time to
time all CPUs turn out to be busy 100% and at the moment websites of my
clients work slowly or don’t work at all.
top screen:
https://www.dropbox.com/s/psuk2cwn6exinyd/3.9.cpu_migration.jpg
All CPUs are busy with kernel threads migration for about 3-5 minutes.
Exactly how often it periodically happens I don’t know, but it happens
once in 1-3 hours.
Approximately 30 my servers work on kernel 2.6.35 and there’s no such
problem there. We use kernels 3.7 – 3.9 on 5 servers and I see such
effect everywhere. If you downgrade on 2.6.35, then migration doesn’t
eat CPUs.
These servers are used for usual LAMP shared hosting.
Can I get migration as if on the kernel 2.6.35 or can this feature be
disabled?
--
BRGDS. Alexey Vlasov.
jabber: renton@1gb.ru
icq: 5128664
next reply other threads:[~2013-08-22 15:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-22 15:00 Alexey Vlasov [this message]
2013-08-29 7:31 ` Kernel migration eat CPUs Mike Galbraith
[not found] <20130823151711.f4c1f596b4c7aa1eecccc9a6@linux-foundation.org>
[not found] ` <20130825142837.GD31370@twins.programming.kicks-ass.net>
2013-08-29 10:10 ` Alexey Vlasov
2013-09-04 18:53 ` Alexey Vlasov
2013-09-05 11:12 ` Ingo Molnar
2013-09-11 15:18 ` Alexey Vlasov
2013-10-10 7:13 ` Alexey Vlasov
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