[mvapich-discuss] MVAPICH2 098 Question

[David Gunter]

The MVAPICH2 version is the 0.9.8p3 version.  The mpiexec being used  
is the OSC mpiexec-0.82 that doesn't support the latest MVAPICH2 1.0  
yet.

There are other reasons we have not upgraded to MVAPICH2 1.0, namely  
that we are experiencing hangs with mpi_sendrecv with message sizes  
above 4MB, something I reported earlier.

Thanks,
david

--
David Gunter
HPC-4: HPC Environments: Parallel Tools Team
Los Alamos National Laboratory


On Oct 16, 2007, at 5:24 PM, Dhabaleswar Panda wrote:

> Hi,
>
>> We are running Mvapich2 .098. It works great up to ~2400  
>> Processors PEs.
>> When we try to scale to 4192 PEs it hangs.
>> Are there some variables or tuning parameters we need to tweak to get
>> it to scale?
>
> Not sure which version of MVAPICH2 0.9.8 you are using. We had a p3
> version available with several bug fixes for MVAPICH2 long time back.
> Are you using this version or the original 0.9.8 released version?
>
> Since MVAPICH2 1.0 has been released for some time and it incorporates
> all bug fixes for 0.9.8 and also new features, I will strongly
> recommend you to use this version. Since MVAPICH2 1.0 release, a few
> more bug fixes have taken place to the 1.0 branch. I will recommend
> taking the version from the branch. We plan to make a release of
> MVAPICH2 1.0.1 in the near future with all these fixes.
>
> Let us know if you see any scaling issues for 1.0 version (from the
> branch) and we will investigate this issue further.
>
> Thanks,
>
> DK
>
>> I see in 1.0 there are some but not sure about 098.
>>
>> Please respond to me directly, I haven't subscribed to the mailing  
>> list yet.
>>
>> thanks in advance.
>> parks
>>
>>
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