From: Ingo Molnar <mingo@elte.hu>
To: Rui Nuno Capela <rncbc@rncbc.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: realtime-preempt-2.6.12-final-V0.7.51-11 glitches [no more]
Date: Mon, 11 Jul 2005 17:55:03 +0200 [thread overview]
Message-ID: <20050711155503.GA21762@elte.hu> (raw)
In-Reply-To: <63108.195.245.190.94.1121094757.squirrel@www.rncbc.org>
* Rui Nuno Capela <rncbc@rncbc.org> wrote:
> After several trials, with CONFIG_PROFILING=y and profile=1
> nmi_watchdog=2 as boot parameters, I'm almost convinced I'm doing
> something wrong :)
>
> - `readprofile` always just outputs one line:
>
> 0 total 0.0000
>
> - `readprofile -a` gives the whole kernel symbol list, all with zero times.
>
> Is there anything else I can check around here?
it means that the NMI watchdog was not activated - i.e. the 'NMI' counts
in /proc/interrupts do not increase. Do you have LOCAL_APIC enabled in
the .config? If yes and if nmi_watchdog=1 does not work either then it's
probably not possible to activate the NMI watchdog on your box. In that
case try nmi_watchdog=0, that should activate normal profiling. (unless
i've broken it via the profile-via-NMI changes ...)
Ingo
next prev parent reply other threads:[~2005-07-11 15:59 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1119299227.20873.113.camel@cmn37.stanford.edu>
[not found] ` <20050621105954.GA18765@elte.hu>
[not found] ` <1119370868.26957.9.camel@cmn37.stanford.edu>
[not found] ` <20050621164622.GA30225@elte.hu>
[not found] ` <1119375988.28018.44.camel@cmn37.stanford.edu>
[not found] ` <1120256404.22902.46.camel@cmn37.stanford.edu>
[not found] ` <20050703133738.GB14260@elte.hu>
[not found] ` <1120428465.21398.2.camel@cmn37.stanford.edu>
2005-07-07 18:46 ` realtime-preempt-2.6.12-final-V0.7.51-11 glitches Rui Nuno Capela
2005-07-07 18:53 ` realtime-preempt-2.6.12-final-V0.7.51-11 glitches [2] Rui Nuno Capela
2005-07-07 19:49 ` realtime-preempt-2.6.12-final-V0.7.51-11 glitches Ingo Molnar
2005-07-07 19:59 ` Ingo Molnar
2005-07-07 23:19 ` Rui Nuno Capela
2005-07-08 8:46 ` realtime-preempt-2.6.12-final-V0.7.51-11 glitches [no more] Rui Nuno Capela
2005-07-08 8:52 ` Ingo Molnar
2005-07-08 9:40 ` Rui Nuno Capela
2005-07-08 9:56 ` Ingo Molnar
2005-07-08 10:53 ` Rui Nuno Capela
2005-07-11 15:12 ` Rui Nuno Capela
2005-07-11 15:55 ` Ingo Molnar [this message]
2005-07-11 22:00 ` Rui Nuno Capela
2005-07-11 22:09 ` Rui Nuno Capela
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