Re: ipc-msg broken again on 3.11-rc7?

[Sedat Dilek]

On Tue, Sep 3, 2013 at 9:49 AM, Manfred Spraul <manfred@xxxxxxxxxxxxxxxx> wrote:
> 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.
>

Cool.
Manfred, can you offer your modified test-cases, please?
Thanks in advance.

- Sedat -

> 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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/