From: Philippe Gerum <rpm@xenomai.org>
To: Paul Ianna <paulianna2002@domain.hid>
Cc: xenomai@xenomai.org
Subject: Re: [Xenomai-help] primary mode versus secondary mode
Date: Wed, 23 Aug 2006 22:17:34 +0200 [thread overview]
Message-ID: <1156364255.4401.71.camel@domain.hid> (raw)
In-Reply-To: <75975c320608231300t30cf5e69u7a629887d9163e40@domain.hid>
On Wed, 2006-08-23 at 16:00 -0400, Paul Ianna wrote:
> On 8/21/06, Philippe Gerum <rpm@xenomai.org> wrote:
> > Also have a look at /proc/xenomai/stats when your application runs, the
> > MSW field (i.e. Mode SWitches) counts the number of transitions for each
> > Xenomai thread. This value should not increase over time, at least for
> > latency critical threads.
>
> Thanks Philippe, very useful.
>
> Could you also explain the CSW, PF, and STAT fields?
CSW: # of context-switches (seen by the Xenomai scheduler, not the Linux
one)
PF: # of page faults (should stop increasing as soon as mlockall is in
effect)
STAT: a bitfield describing the internal state of the thread. Bit values
are defined in include/nucleus/thread.h (See status and mode bits). The
STAT field from /proc/xenomai/sched gives a 1-letter-per-bit symbolic
translation of a the most significant subset of those bits (from a user
POV, that is). See "Status symbols" in the same source file.
>
> Thanks,
> Paul
>
> _______________________________________________
> Xenomai-help mailing list
> Xenomai-help@domain.hid
> https://mail.gna.org/listinfo/xenomai-help
--
Philippe.
next prev parent reply other threads:[~2006-08-23 20:17 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <75975c320608211235l79dfb17ft54df1018e7f597ff@domain.hid>
2006-08-21 20:21 ` [Xenomai-help] primary mode versus secondary mode Paul Ianna
2006-08-21 20:42 ` Philippe Gerum
2006-08-23 20:00 ` Paul Ianna
2006-08-23 20:17 ` Philippe Gerum [this message]
2006-08-21 20:44 ` Jan Kiszka
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