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Subject: Re: [OMPI users] Question about compatibility issues
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2009-02-01 06:28:18


On Jan 26, 2009, at 4:57 PM, Ted Yu wrote:

> I'm new to this group. I'm trying to implement a parallel quantum
> code called "Seqquest".
> I'm trying to figure out why there is an error in the implementation
> of this code where there is an error:
>
> This job has allocated 2 cpus
> Signal:11 info.si_errno:0(Success) si_code:1(SEGV_MAPERR)
> Failing at addr:(nil)
> [0] func:/usr/lib64/openmpi/libopal.so.0 [0x393af21dc5]
> [1] func:/lib64/tls/libpthread.so.0 [0x393b80c4f0]
> [2] func:/project/source/seqquest/seqquest_source_v261i/
> hive_CentOS4.5_parallel/build_261i/quest_ompi.x [0x4f5cfd]
> [3] func:/project/source/seqquest/seqquest_source_v261i/
> hive_CentOS4.5_parallel/build_261i/quest_ompi.x(rhosave_+0x120)
> [0x4f6a8a]
> [4] func:/project/source/seqquest/seqquest_source_v261i/
> hive_CentOS4.5_parallel/build_261i/quest_ompi.x(MAIN__+0xb710)
> [0x431770]
> [5] func:/project/source/seqquest/seqquest_source_v261i/
> hive_CentOS4.5_parallel/build_261i/quest_ompi.x(main+0xe) [0xa717ee]
> [6] func:/lib64/tls/libc.so.6(__libc_start_main+0xdb) [0x393b11c3fb]
> [7] func:/project/source/seqquest/seqquest_source_v261i/
> hive_CentOS4.5_parallel/build_261i/quest_ompi.x(free+0x3a) [0x425fca]
> *** End of error message ***
> ^@mpiexec: Warning: task 0 died with signal 11 (Segmentation fault).
>
>
> Trying to debug this code, I noticed that the math library is an
> Intel math library, but all of the codes including scalapack and
> blacs were compiled using GNU compiler. Will there be compatibility
> issues?

There *could* be. Have you tried to compile everything with the GNU
compiler?

You might also try to examine what exactly in free() is going bad --
are you passing a bad address to free? Can you run the code through a
debugger and/or examine corefiles?

-- 
Jeff Squyres
Cisco Systems