[mpich-discuss] Announcing the availability of MPICH2-1.2

[Scott Atchley]

Hi all,

I looked at the changes and noticed that it mentioned multiple  
improvements to Nemesis/MX and so I searched Trac for "nemesis mx".

Changesets 5126 and 5148 mention the limit of MX endpoints per host.  
This defaults to 8, but can be modified when MX is loaded. Rather than  
outline the procedure in the README or CHANGES, you may want to simply  
edit the README to recommend that the user contact help at myri.com if  
they need to use more endpoints. We do not recommend oversubscribing  
the cores (more MPI ranks than cores), but someone will need to do  
this if they have more than 8 cores/host or if they use PVFS2/MX or  
Lustre/MX with 8 cores/host.

Regards,

Scott

On Oct 7, 2009, at 4:02 PM, Pavan Balaji wrote:

>
> A new stable release of MPICH2 (release version 1.2) is available  
> from http://www.mcs.anl.gov/research/projects/mpich2/downloads/index.php?s=downloads
>
> This is the first general availability release in the MPICH2-1.2  
> series and contains several new features (including support for  
> MPI-2.2), performance improvements, code cleanup, and other general  
> improvements (major additions are highlighted below). We recommend  
> all users using older releases of MPICH2 to upgrade to this version.
>
> Please try it out and let us know if you encounter any problems at mpich-discuss at mcs.anl.gov
>
> Windows binaries are available from the downloads page as well.
>
> Regards,
> The MPICH2 Team
>
> = 
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> = 
> = 
> ======================================================================
>                               Changes in 1.2
> = 
> = 
> = 
> = 
> = 
> = 
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> = 
> = 
> ======================================================================
>
> # OVERALL: Support for MPI-2.2
>
> # OVERALL: Several fixes to Nemesis/MX.
>
> # WINDOWS: Performance improvements to Nemesis/windows.
>
> # PM/PMI: Scalability and performance improvements to Hydra using
>   PMI-1.1 process-mapping features.
>
> # PM/PMI: Support for process-binding for hyperthreading enabled
>   systems in Hydra.
>
> # PM/PMI: Initial support for PBS as a resource management kernel in
>   Hydra.
>
> # PM/PMI: PMI2 client code is now officially included in the release.
>
> # TEST SUITE: Support to run the MPICH2 test suite through valgrind.
>
> # Several other minor bug fixes, memory leak fixes, and code cleanup.
>   A full list of changes is available using:
>
>     svn log -r5025:HEAD https://svn.mcs.anl.gov/repos/mpi/mpich2/tags/release/mpich2-1.2
>
>     ... or at the following link:
>
> https://trac.mcs.anl.gov/projects/mpich2/log/mpich2/tags/release/mpich2-1.2?action=follow_copy&rev=HEAD&stop_rev=5025&mode=follow_copy
>
> -- 
> Pavan Balaji
> http://www.mcs.anl.gov/~balaji