From: "Tobias Knutsson" <tobias.knutsson@gmail.com>
To: linux-rt-users@vger.kernel.org
Subject: Cyclictest usage
Date: Mon, 11 Aug 2008 11:00:19 +0200 [thread overview]
Message-ID: <ccb913ac0808110200m7a34b361j5a60e9ef31ebb0f4@mail.gmail.com> (raw)
Hello,
I'm trying to do some initial benchmarking on a rt-kernel versus a
vanilla kernel. On the rt the results are stable in between test runs
using the following command:
cyclictest -t 1 -p 80 -c 1 -n -i 10000 -l 10000
However, using the same command while running the vanilla kernel, I
get very varying results. And I would completely understand if it was
due to increased jitter. The thing is, the jitter is very low (0%
load) but the average times varies from 600 us to 6500 us depending on
when the test is initiated.
I imagine this might have something to do with not having high res
timers in the vanilla kernel. If that is what's causing my problems.
What is the best way of comparing the two kernels?
I would be much greatful for a few pointers!
--
Hälsningar/Regards
Tobias Knutsson
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next reply other threads:[~2008-08-11 9:00 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-08-11 9:00 Tobias Knutsson [this message]
2008-08-11 12:48 ` Cyclictest usage Gregory Haskins
[not found] ` <ccb913ac0808110638v79283450j8d4953bc0820e747@mail.gmail.com>
2008-08-11 13:55 ` Gregory Haskins
-- strict thread matches above, loose matches on Subject: below --
2017-05-26 16:25 cyclictest usage Clark Williams
2017-06-02 9:59 ` Sebastian Andrzej Siewior
2017-06-02 14:26 ` Clark Williams
2017-06-02 16:54 ` Austin Schuh
2017-06-08 8:46 ` Sebastian Andrzej Siewior
2017-06-08 8:40 ` Sebastian Andrzej Siewior
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