From: "M. Koehrer" <mathias_koehrer@domain.hid>
To: xenomai@xenomai.org
Subject: [Xenomai-help] Xenomai and Perfmon2?
Date: Mon, 12 Jan 2009 09:09:47 +0100 (CET) [thread overview]
Message-ID: <21175505.1231747787507.JavaMail.ngmail@domain.hid> (raw)
Hi everybody,
I am using Xenomai for real time system that has to compute complex simulations.
For that, not only real time behaviour but also computation power is relevant.
I am using Intel's Core 2 Duo/Quad CPUs.
The perfom2 package (http://perfmon2.sourceforge.net/) allows to access the CPU's
perfomance monitoring registers fairly easily.
It contains a kernel patch and a user mode frontend.
I have now tried to apply the Xenomai patch (first) and the perfom2 patch (second) which seems to work
(some slight modifications on the perfom2 patch have been necessary) partially.
I can now use the system-wide mode of pfmon, however I can not attach from pfmon to a running
realtime task (the kernel freezes), but at least the system-wide mode is quite helpful.
My questions to this combination:
- Can the perfmon2 kernel patch somehow destroy the real time behaviour of the Xenomai executable?
- I am mostly interested in things like EIST mode (Intel speed Step) changes, bus access delays etc.
Is there more simple way to access this information but using the perfom2 patch?
Thanks for any response on that questions!
Mathias
--
Mathias Koehrer
mathias_koehrer@domain.hid
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next reply other threads:[~2009-01-12 8:09 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-12 8:09 M. Koehrer [this message]
2009-01-12 10:10 ` [Xenomai-help] Xenomai and Perfmon2? Gilles Chanteperdrix
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