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Subject: Re: [OMPI users] Open MPI, Segmentation fault
From: David Zhang (solarbikedz_at_[hidden])
Date: 2010-06-30 12:43:51


When I got segmentation faults, it has always been my coding mistakes.
Perhaps your code is not robust against number of processes not divisible by
2?

On Wed, Jun 30, 2010 at 8:47 AM, Jack Bryan <dtustudy68_at_[hidden]> wrote:

> Dear All,
>
> I am using Open MPI, I got the error:
>
> n337:37664] *** Process received signal ***
> [n337:37664] Signal: Segmentation fault (11)
> [n337:37664] Signal code: Address not mapped (1)
> [n337:37664] Failing at address: 0x7fffcfe90000
> [n337:37664] [ 0] /lib64/libpthread.so.0 [0x3c50e0e4c0]
> [n337:37664] [ 1]
> /lustre/home/rhascheduler/RhaScheduler-0.4.1.1/mytest/nmn2 [0x414ed7]
> [n337:37664] [ 2] /lib64/libc.so.6(__libc_start_main+0xf4) [0x3c5021d974]
> [n337:37664] [ 3]
> /lustre/home/rhascheduler/RhaScheduler-0.4.1.1/mytest/nmn2(__gxx_personality_v0+0x1f1)
> [0x412139]
> [n337:37664] *** End of error message ***
>
> After searching answers, it seems that some functions fail.
>
> My program can run well for 1,2,10 processors, but fail when the number of
> tasks cannot
> be divided evenly by number of processes.
>
> Any help is appreciated.
>
> thanks
>
> Jack
>
> June 30 2010
>
>
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-- 
David Zhang
University of California, San Diego