[Beowulf] MPICH vs MPICH2
rross at mcs.anl.gov
Wed Apr 13 13:53:00 EDT 2005
MPICH2 does not support heterogeneous collections of architectures as
MPICH does; that's the only reason why one wouldn't want to switch.
Robert Latham wrote:
> On Thu, Apr 07, 2005 at 03:30:09PM +0800, John Lau wrote:
>>Does anyone compare the different between MPICH and MPICH2? What are the
>>greatest new features in MPICH2? And does the MPICH2 have large
>>performance increase than MPICH? I would like to see some benchmarks
>>that compare them.
> Well, the foremost differnce between MPICH and MPICH2 is that MPICH2
> implementes MPI-2, whereas MPICH implmented only MPI-1 and MPI-IO.
> MPICH2 has improved datatype handling routines
> R. Ross, N. Miller, and W. Gropp, "Implementing Fast and
> Reusable Datatype Processing," Proceedings of EuroPVM/MPI
> 2003, Venice, Italy, September, 2003.
> MPICH2 has excellent performance for one-sided opeerations. Hard to
> compare with MPICH on this one, but there are benchmarks where MPICH2
> compares favorably with other MPI-2 implementations.
> R. Thakur, W. Gropp, and B. Toonen, "Minimizing
> Synchronization Overhead in the Implementation of MPI
> One-Sided Communication", Proceedings of the 11th European
> PVM/MPI Users' Group Conference (Euro PVM/MPI 2004), September
> I can't find the data to back this up but MPICH2 does perform better
> than MPICH1 in point-to-point messaging (as measured by NetPIPE). 28%
> faster for an 8MB message.
> I hope that's enough to entice you into trying MPICH2. I work with
> the MPICH2 folks, so I'm a little biased, but it's a quality
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