Date: Tue, 22 Feb 2011 11:57:13 -0800 From: John-Mark Gurney <jmg@funkthat.com> To: Jerome Flesch <jerome.flesch@netasq.com> Cc: freebsd-current@freebsd.org Subject: Re: Process timing issue Message-ID: <20110222195713.GW66284@funkthat.com> In-Reply-To: <4D638050.2010906@netasq.com> References: <4D6291A5.4050206@netasq.com> <8C8FE4A5-F031-466A-9CB8-46D79EEA280D@mac.com> <4D638050.2010906@netasq.com>
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Jerome Flesch wrote this message on Tue, Feb 22, 2011 at 10:22 +0100:
> We expected both processes (the test program and openssl) to have each
> half the CPU time and being scheduled quite often (at least once each
> 10ms). According to the output of our test program, it works fine for
> most of the calls to clock_gettime(), but from time to time (about 1
> loop in 200000 on my computer), we have a latency pike (>= 100ms).
Are you sure there isn't a cron task or something else that is suddenly
waking up, causing a large CPU spike?
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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