Open MPI logo

Open MPI Development Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Development mailing list

Subject: Re: [OMPI devel] MPI_Cart_coords_f segv with Intel compiler
From: Jeff Squyres (jsquyres_at_[hidden])
Date: 2012-05-24 16:19:58


FWIW, I think we imported your patch a while ago. Here it is on the trunk:

https://svn.open-mpi.org/trac/ompi/browser/trunk/opal/mca/memory/linux/malloc.c#L3933

And here it is on v1.6:

https://svn.open-mpi.org/trac/ompi/browser/branches/v1.6/opal/mca/memory/linux/malloc.c#L3933

On May 24, 2012, at 2:06 PM, Larry Baker wrote:

> Terry,
>
> What you are seeing is a bug in the vectorizer in the Intel 2011.6.233 release. We've talked about this before. You should probably remove that compiler from your system(s). I think the new release of OpenMPI describes this problem, but does not stop if from occurring. I write a patch for ptmalloc2/malloc.c for OpenMPI 1.4.3 which automatically adjusts the optimization level for _int_malloc(), which is where the bug occurs.
>
> Larry Baker
> US Geological Survey
> 650-329-5608
> baker_at_[hidden]
>
> ---------- Start of Patch ----------
> --- opal/mca/memory/ptmalloc2/malloc.c.original 2010-04-13 10:30:26.000000000 -0700
> +++ opal/mca/memory/ptmalloc2/malloc.c 2011-11-04 15:01:37.000000000 -0700
> @@ -2,6 +2,17 @@
> /* Copyright (c) 2010 Cisco Systems, Inc. All rights reserved.
> */
>
> +/* With Intel Composer XE V12.1.0, release 2011.6.233, any launch */
> +/* fails, even before main(), due to a bug in the vectorizer (see */
> +/* https://svn.open-mpi.org/trac/ompi/changeset/25290). The fix is */
> +/* to disable vectorization by reducing the optimization level to */
> +/* -O1 for _int_malloc(). The only reliable method to identify */
> +/* release 2011.6.233 is the predefined __INTEL_COMPILER_BUILD_DATE */
> +/* macro, which will have the value 20110811 (Linux, Windows, and */
> +/* Mac OS X). (The predefined __INTEL_COMPILER macro is nonsense, */
> +/* 9999, and both the 2011.6.233 and 2011.7.256 releases identify */
> +/* themselves as V12.1.0 from the -v command line option.) */
> +
> #define OPAL_DISABLE_ENABLE_MEM_DEBUG 1
> #include "opal_config.h"
>
> @@ -3945,6 +3956,12 @@
> ------------------------------ malloc ------------------------------
> */
>
> +#ifdef __INTEL_COMPILER_BUILD_DATE
> +#if __INTEL_COMPILER_BUILD_DATE == 20110811
> +#pragma GCC optimization_level 1
> +#endif
> +#endif
> +
> Void_t*
> _int_malloc(mstate av, size_t bytes)
> {
> ---------- End of Patch ----------
>
> On 24 May 2012, at 6:54 AM, TERRY DONTJE wrote:
>
>> I am seeing several Cart Fortran tests (like MPI_Cart_coords_f) segv in opal_memory_ptmalloc2_int_free when OMPI trunk is compiled with icc 12.1.0 for 64 bit on linux. Just wondering if anyone has seen anything similar to this with a different version of icc. Other non-Intel compilers seem to not exhibit this issue.
>>
>> --
>> Terry D. Dontje | Principal Software Engineer
>> Developer Tools Engineering | +1.781.442.2631
>> Oracle - Performance Technologies
>> 95 Network Drive, Burlington, MA 01803
>> Email terry.dontje_at_[hidden]
>>
>>
>>
>> _______________________________________________
>> devel mailing list
>> devel_at_[hidden]
>> http://www.open-mpi.org/mailman/listinfo.cgi/devel
>
> _______________________________________________
> devel mailing list
> devel_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/devel

-- 
Jeff Squyres
jsquyres_at_[hidden]
For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/