From: Gilles Chanteperdrix <gilles.chanteperdrix@xenomai.org>
To: Jan Kiszka <jan.kiszka@domain.hid>
Cc: "xenomai@xenomai.org" <xenomai@xenomai.org>
Subject: Re: [Xenomai-help] machine hangs running oprofile on xenomai kernel
Date: Wed, 30 Jun 2010 00:36:54 +0200 [thread overview]
Message-ID: <4C2A7586.5070107@domain.hid> (raw)
In-Reply-To: <4C2A74C0.2000909@domain.hid>
Jan Kiszka wrote:
> [please do not top-post]
>
> Sydir, Jerry wrote:
>> Hi Jan,
>>
>> Thanks for your reply. I tried loading the oprofile module with timer=1 and oprofile seems to work (doesn't hang the system and spits out some results). So it appears that the use of NMIs are the problem. Do you have any suggestions on what to try next?
>
> Now someone would have to dig into the code path taken by oprofile
> during NMI handling to find the reason for the lock-up. Did you have any
> real-time jobs running when starting the profiling, or was Xenomai idle?
>
> On the other hand, oprofile is a legacy interface. It probably makes
> more sense to try and, if required, fix perf instead.
Could not there be some bad interaction with Xenomai NMI watchdog?
--
Gilles.
next prev parent reply other threads:[~2010-06-29 22:36 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-28 16:48 [Xenomai-help] machine hangs running oprofile on xenomai kernel Sydir, Jerry
2010-06-29 14:47 ` Jan Kiszka
2010-06-29 21:27 ` Sydir, Jerry
2010-06-29 22:33 ` Jan Kiszka
2010-06-29 22:36 ` Gilles Chanteperdrix [this message]
2010-06-30 0:13 ` Sydir, Jerry
2010-06-30 0:02 ` Sydir, Jerry
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