From: Manfred Spraul <manfred@colorfullife.com>
To: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Cc: "sedat.dilek@gmail.com" <sedat.dilek@gmail.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Davidlohr Bueso <dave.bueso@gmail.com>,
Davidlohr Bueso <davidlohr.bueso@hp.com>,
linux-next <linux-next@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Stephen Rothwell <sfr@canb.auug.org.au>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm <linux-mm@kvack.org>, Andi Kleen <andi@firstfloor.org>,
Rik van Riel <riel@redhat.com>,
Jonathan Gonzalez <jgonzalez@linets.cl>
Subject: Re: ipc-msg broken again on 3.11-rc7?
Date: Tue, 03 Sep 2013 09:49:48 +0200 [thread overview]
Message-ID: <5225949C.9030201@colorfullife.com> (raw)
In-Reply-To: <C2D7FE5348E1B147BCA15975FBA2307514160B@IN01WEMBXA.internal.synopsys.com>
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Hi Vineet,
On 09/03/2013 09:34 AM, Vineet Gupta wrote:
> However assuming we are going ahead with debugging this - can you
> please confirm whether you see the issue on x86 as well as I have not
> tested that ? I vaguely remember one of your earlier posts suggested
> you did Thx, -Vineet
I'm unable to reproduce the issue so far. I ran
- something like 4000 stock msgctl08 with 4 cores on x86.
- a few runs with modified msgctl08 with either slowed down reader or
slowed down writer threads. (i.e.: force queue full or queue empty waits).
- a few runs (modified&unmodified) with all but one core taken offline.
I have not yet tested with PREEMPT enabled.
A few more ideas:
- what is the output of ipcs -q? Are the queues empty or full?
- what is the output of then WCHAN field with ps when it hangs?
Something like
/ #ps/ -o pid,f,stat,pcpu,pmem,psr,/wchan/=/WIDE/-/WCHAN/ -o comm,args
--
Manfred
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next prev parent reply other threads:[~2013-09-03 7:49 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-21 19:34 linux-next: Tree for Jun 21 [ BROKEN ipc/ipc-msg ] Sedat Dilek
2013-06-21 22:07 ` Davidlohr Bueso
2013-06-21 22:54 ` Sedat Dilek
2013-06-21 23:11 ` Davidlohr Bueso
2013-06-21 23:14 ` Sedat Dilek
2013-06-21 23:15 ` Sedat Dilek
2013-06-25 16:10 ` Sedat Dilek
2013-06-25 20:33 ` Davidlohr Bueso
2013-06-25 21:41 ` Sedat Dilek
2013-06-25 23:29 ` Davidlohr Bueso
2013-08-28 11:58 ` ipc-msg broken again on 3.11-rc7? (was Re: linux-next: Tree for Jun 21 [ BROKEN ipc/ipc-msg ]) Vineet Gupta
2013-08-29 3:04 ` Sedat Dilek
2013-08-29 7:21 ` Vineet Gupta
2013-08-29 7:52 ` Sedat Dilek
2013-08-30 8:19 ` Vineet Gupta
2013-08-30 8:27 ` Sedat Dilek
2013-08-30 8:46 ` ipc-msg broken again on 3.11-rc7? Vineet Gupta
[not found] ` <CALE5RAvaa4bb-9xAnBe07Yp2n+Nn4uGEgqpLrKMuOE8hhZv00Q@mail.gmail.com>
2013-08-30 16:31 ` Davidlohr Bueso
2013-08-31 17:50 ` Linus Torvalds
2013-09-02 4:58 ` Vineet Gupta
2013-09-02 16:29 ` Manfred Spraul
2013-09-03 7:16 ` Sedat Dilek
2013-09-03 7:34 ` Vineet Gupta
2013-09-03 7:49 ` Manfred Spraul [this message]
2013-09-03 8:43 ` Sedat Dilek
2013-09-03 8:44 ` Vineet Gupta
2013-09-03 8:57 ` Manfred Spraul
2013-09-03 9:16 ` Vineet Gupta
2013-09-03 9:23 ` Manfred Spraul
2013-09-03 9:51 ` Vineet Gupta
2013-09-03 10:16 ` Manfred Spraul
2013-09-03 10:32 ` ipc msg now works (was Re: ipc-msg broken again on 3.11-rc7?) Vineet Gupta
2013-09-03 22:46 ` Sedat Dilek
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