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Subject: Re: [OMPI devel] RFC: System V Shared Memory for Open MPI
From: Samuel K. Gutierrez (samuel_at_[hidden])
Date: 2010-06-01 13:49:55


Hi Rich,

I'll add a configure-time option. This addition does not negatively
impact the performance of the current sm component.

Thanks,

--
Samuel K. Gutierrez
Los Alamos National Laboratory
On Jun 1, 2010, at 11:35 AM, Graham, Richard L. wrote:
> Can you be a bit more explicit, please ?
> I do not want this on our systems, so as long as this is a compile  
> time decision, and as long as this does not degrade the performance  
> of the current sm device, I will not object.
>
> Rich
>
> ----- Original Message -----
> From: devel-bounces_at_[hidden] <devel-bounces_at_[hidden]>
> To: Open MPI Developers <devel_at_[hidden]>
> Sent: Tue Jun 01 13:08:46 2010
> Subject: [OMPI devel] RFC: System V Shared Memory for Open MPI
>
> WHAT: New System V shared memory component.
>
> WHY: https://svn.open-mpi.org/trac/ompi/ticket/1320
>
> WHERE:
> M      ompi/mca/btl/sm/btl_sm.c
> M      ompi/mca/btl/sm/btl_sm_component.c
> M      ompi/mca/btl/sm/btl_sm.h
> M      ompi/mca/mpool/sm/mpool_sm_component.c
> M      ompi/mca/mpool/sm/mpool_sm.h
> M      ompi/mca/mpool/sm/mpool_sm_module.c
> A      ompi/mca/common/sm/configure.m4
> A      ompi/mca/common/sm/common_sm_sysv.h
> A      ompi/mca/common/sm/common_sm_windows.c
> A      ompi/mca/common/sm/common_sm_windows.h
> A      ompi/mca/common/sm/common_sm.c
> A      ompi/mca/common/sm/common_sm_sysv.c
> A      ompi/mca/common/sm/common_sm.h
> M      ompi/mca/common/sm/common_sm_mmap.c
> M      ompi/mca/common/sm/common_sm_mmap.h
> M      ompi/mca/common/sm/Makefile.am
> M      ompi/mca/common/sm/help-mpi-common-sm.txt
> M      ompi/mca/coll/sm/coll_sm_module.c
> M      ompi/mca/coll/sm/coll_sm.h
>
> WHEN: Upon acceptance.
>
> TIMEOUT: Tuesday, June 8, 2010 (after devel concall).
>
> HOW:
> MCA mpi: parameter "mpi_common_sm" (current value: <mmap>,
>                           data source: default value)
>                           Which shared memory support will be used.
> Valid
>                           values: sysv,mmap - or a comma delimited
> combination
>                           of them (order dependent).  The first
> component that
>                           is successfully selected is used.
>
> Thanks!
>
> --
> Samuel K. Gutierrez
> Los Alamos National Laboratory
>
>
>
>
>
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