From: Carsten Schiers <carsten@schiers.de>
To: xen-devel@lists.xensource.com
Subject: AW: Question on xenpm
Date: Mon, 5 Jul 2010 13:05:56 +0200 [thread overview]
Message-ID: <12610028.121278327956001.JavaMail.root@uhura> (raw)
In-Reply-To: <25029217.31278320963140.JavaMail.root@uhura>
Just a short addon-question, xenpm get-cpufreq-para will currently leave
the scaling driver blank. How can I make sure that the powernow driver is
used?
Thanks,
Carsten.
----- Originalnachricht -----
Von: Carsten Schiers <carsten@schiers.de>
Gesendet: Mon, 5.7.2010 11:09
An: xen-devel@lists.xensource.com
Betreff: [Xen-devel] Question on xenpm
Dear all,
after having upgraded my server from AMD 4050e to X4 640, I now use cpufreq=xen and had
to adapt a munin script (monitoring tool) to display the residency in the different P-states.
This script uses /sys/device/system/cpu/cpu0/cpufreq to read out the information, whereas
I now use xenpm get-cpufreq-state.
Before I noticed that the CPU is in highest possible P-state (lowest frequences) nearly all
of the time, and a minimal percentage in the lowest. Now I can see a 50/50 distribution.
Interesting enough, the xenpm get-cpuidle-state will show that the CPUs are at aprox. 90%
in C1 idle state.
Can there be a difference in how the two methods to collect the info are working? I mean
something like xenpm will not count residency when in C1, but cpufreq driver will normaly
do?
BR,
Carsten.
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prev parent reply other threads:[~2010-07-05 11:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-05 9:09 Question on xenpm Carsten Schiers
2010-07-05 11:05 ` Carsten Schiers [this message]
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