From: Manfred Spraul <manfred@colorfullife.com>
To: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Davidlohr Bueso <dave.bueso@gmail.com>,
Sedat Dilek <sedat.dilek@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 10:57:10 +0200 [thread overview]
Message-ID: <5225A466.2080303@colorfullife.com> (raw)
In-Reply-To: <C2D7FE5348E1B147BCA15975FBA23075141642@IN01WEMBXA.internal.synopsys.com>
On 09/03/2013 10:44 AM, Vineet Gupta wrote:
>> b) Could you check that it is not just a performance regression?
>> Does ./msgctl08 1000 16 hang, too?
> Nope that doesn't hang. The minimal configuration that hangs reliably is msgctl
> 50000 2
>
> With this config there are 3 processes.
> ...
> 555 554 root S 1208 0.4 0 0.0 ./msgctl08 50000 2
> 554 551 root S 1208 0.4 0 0.0 ./msgctl08 50000 2
> 551 496 root S 1208 0.4 0 0.0 ./msgctl08 50000 2
> ...
>
> [ARCLinux]$ cat /proc/551/stack
> [<80aec3c6>] do_wait+0xa02/0xc94
> [<80aecad2>] SyS_wait4+0x52/0xa4
> [<80ae24fc>] ret_from_system_call+0x0/0x4
>
> [ARCLinux]$ cat /proc/555/stack
> [<80c2950e>] SyS_msgrcv+0x252/0x420
> [<80ae24fc>] ret_from_system_call+0x0/0x4
>
> [ARCLinux]$ cat /proc/554/stack
> [<80c28c82>] do_msgsnd+0x116/0x35c
> [<80ae24fc>] ret_from_system_call+0x0/0x4
>
> Is this a case of lost wakeup or some such. I'm running with some more diagnostics
> and will report soon ...
What is the output of ipcs -q? Is the queue full or empty when it hangs?
I.e. do we forget to wake up a receiver or forget to wake up a sender?
--
Manfred
WARNING: multiple messages have this Message-ID (diff)
From: Manfred Spraul <manfred@colorfullife.com>
To: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Davidlohr Bueso <dave.bueso@gmail.com>,
Sedat Dilek <sedat.dilek@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 10:57:10 +0200 [thread overview]
Message-ID: <5225A466.2080303@colorfullife.com> (raw)
In-Reply-To: <C2D7FE5348E1B147BCA15975FBA23075141642@IN01WEMBXA.internal.synopsys.com>
On 09/03/2013 10:44 AM, Vineet Gupta wrote:
>> b) Could you check that it is not just a performance regression?
>> Does ./msgctl08 1000 16 hang, too?
> Nope that doesn't hang. The minimal configuration that hangs reliably is msgctl
> 50000 2
>
> With this config there are 3 processes.
> ...
> 555 554 root S 1208 0.4 0 0.0 ./msgctl08 50000 2
> 554 551 root S 1208 0.4 0 0.0 ./msgctl08 50000 2
> 551 496 root S 1208 0.4 0 0.0 ./msgctl08 50000 2
> ...
>
> [ARCLinux]$ cat /proc/551/stack
> [<80aec3c6>] do_wait+0xa02/0xc94
> [<80aecad2>] SyS_wait4+0x52/0xa4
> [<80ae24fc>] ret_from_system_call+0x0/0x4
>
> [ARCLinux]$ cat /proc/555/stack
> [<80c2950e>] SyS_msgrcv+0x252/0x420
> [<80ae24fc>] ret_from_system_call+0x0/0x4
>
> [ARCLinux]$ cat /proc/554/stack
> [<80c28c82>] do_msgsnd+0x116/0x35c
> [<80ae24fc>] ret_from_system_call+0x0/0x4
>
> Is this a case of lost wakeup or some such. I'm running with some more diagnostics
> and will report soon ...
What is the output of ipcs -q? Is the queue full or empty when it hangs?
I.e. do we forget to wake up a receiver or forget to wake up a sender?
--
Manfred
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WARNING: multiple messages have this Message-ID (diff)
From: Manfred Spraul <manfred@colorfullife.com>
To: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Davidlohr Bueso <dave.bueso@gmail.com>,
Sedat Dilek <sedat.dilek@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 10:57:10 +0200 [thread overview]
Message-ID: <5225A466.2080303@colorfullife.com> (raw)
In-Reply-To: <C2D7FE5348E1B147BCA15975FBA23075141642@IN01WEMBXA.internal.synopsys.com>
On 09/03/2013 10:44 AM, Vineet Gupta wrote:
>> b) Could you check that it is not just a performance regression?
>> Does ./msgctl08 1000 16 hang, too?
> Nope that doesn't hang. The minimal configuration that hangs reliably is msgctl
> 50000 2
>
> With this config there are 3 processes.
> ...
> 555 554 root S 1208 0.4 0 0.0 ./msgctl08 50000 2
> 554 551 root S 1208 0.4 0 0.0 ./msgctl08 50000 2
> 551 496 root S 1208 0.4 0 0.0 ./msgctl08 50000 2
> ...
>
> [ARCLinux]$ cat /proc/551/stack
> [<80aec3c6>] do_wait+0xa02/0xc94
> [<80aecad2>] SyS_wait4+0x52/0xa4
> [<80ae24fc>] ret_from_system_call+0x0/0x4
>
> [ARCLinux]$ cat /proc/555/stack
> [<80c2950e>] SyS_msgrcv+0x252/0x420
> [<80ae24fc>] ret_from_system_call+0x0/0x4
>
> [ARCLinux]$ cat /proc/554/stack
> [<80c28c82>] do_msgsnd+0x116/0x35c
> [<80ae24fc>] ret_from_system_call+0x0/0x4
>
> Is this a case of lost wakeup or some such. I'm running with some more diagnostics
> and will report soon ...
What is the output of ipcs -q? Is the queue full or empty when it hangs?
I.e. do we forget to wake up a receiver or forget to wake up a sender?
--
Manfred
next prev parent reply other threads:[~2013-09-03 8:57 UTC|newest]
Thread overview: 62+ 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 22:07 ` Davidlohr Bueso
2013-06-21 22:54 ` Sedat Dilek
2013-06-21 22:54 ` Sedat Dilek
2013-06-21 23:11 ` Davidlohr Bueso
2013-06-21 23:11 ` Davidlohr Bueso
2013-06-21 23:14 ` Sedat Dilek
2013-06-21 23:14 ` Sedat Dilek
2013-06-21 23:15 ` 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 20:33 ` Davidlohr Bueso
2013-06-25 21:41 ` Sedat Dilek
2013-06-25 23:29 ` Davidlohr Bueso
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
2013-08-28 11:58 ` Vineet Gupta
2013-08-29 3:04 ` Sedat Dilek
2013-08-29 3:04 ` Sedat Dilek
2013-08-29 7:21 ` Vineet Gupta
2013-08-29 7:21 ` Vineet Gupta
2013-08-29 7:52 ` Sedat Dilek
2013-08-29 7:52 ` Sedat Dilek
2013-08-30 8:19 ` Vineet Gupta
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
2013-08-30 8:46 ` Vineet Gupta
[not found] ` <CALE5RAvaa4bb-9xAnBe07Yp2n+Nn4uGEgqpLrKMuOE8hhZv00Q@mail.gmail.com>
2013-08-30 16:31 ` Davidlohr Bueso
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
2013-09-02 16:29 ` Manfred Spraul
2013-09-02 16:29 ` Manfred Spraul
2013-09-03 7:16 ` Sedat Dilek
2013-09-03 7:16 ` Sedat Dilek
2013-09-03 7:34 ` Vineet Gupta
2013-09-03 7:34 ` Vineet Gupta
2013-09-03 7:49 ` Manfred Spraul
2013-09-03 7:49 ` Manfred Spraul
2013-09-03 8:43 ` Sedat Dilek
2013-09-03 8:43 ` Sedat Dilek
2013-09-03 8:44 ` Vineet Gupta
2013-09-03 8:44 ` Vineet Gupta
2013-09-03 8:57 ` Manfred Spraul [this message]
2013-09-03 8:57 ` Manfred Spraul
2013-09-03 8:57 ` Manfred Spraul
2013-09-03 9:16 ` Vineet Gupta
2013-09-03 9:16 ` Vineet Gupta
2013-09-03 9:23 ` Manfred Spraul
2013-09-03 9:23 ` Manfred Spraul
2013-09-03 9:23 ` Manfred Spraul
2013-09-03 9:51 ` Vineet Gupta
2013-09-03 10:16 ` Manfred Spraul
2013-09-03 10:16 ` 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 10:32 ` Vineet Gupta
2013-09-03 22:46 ` Sedat Dilek
2013-09-03 22:46 ` Sedat Dilek
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