[mvapich-discuss] thread safety

[Jonathan Perkins]

On Wed, Sep 23, 2009 at 10:44:15PM -0400, Scott Brozell wrote:
> Hi,
> 
> How about MVAPICH2 1.2 ?

This also allows MPI_THREAD_MULTIPLE.  I'd have to check to see when the
ability was first introduced but it has been available for some time
now.

> 
> thanks,
> Scott
> 
> On Wed, Sep 23, 2009 at 10:27:57PM -0400, Dhabaleswar Panda wrote:
> > >
> > > Which versions of mvapich are thread safe ?
> > >
> > > http://mvapich.cse.ohio-state.edu/support/user_guide_mvapich2-1.4rc2.html
> > > "1.4 provides support and optimizations for other MPI-2 features, multi-threading"
> > > Does that mean thread safe ?
> > 
> > Yes. MVAPICH2 1.4 is based on MPICH2 1.0.8p1. You should be using
> > MPI_THREAD_MULTIPLE feature.
> > 
> > Thanks,
> > 
> > DK
> > 
> > > MPICH2 supports thread safety:
> > > www.mcs.anl.gov/~thakur/papers/mpi-threads.pdf
> > > "In the next release, 1.0.4, the default build of the ch3:sock channel will support thread safety,
> > > but thread safety will be enabled only if the user calls MPI Init thread with
> > > MPI THREAD MULTIPLE."
> > > Does mvapich use the same thread safety mechanism ?
> > >
> > > thanks,
> > > Scott
> > >
> > > Scott Brozell, Ph.D.
> > > Senior Systems Developer/Engineer
> > > Science and Technology Support
> > > Ohio Supercomputer Center
> > >
> > > _______________________________________________
> > > mvapich-discuss mailing list
> > > mvapich-discuss at cse.ohio-state.edu
> > > http://mail.cse.ohio-state.edu/mailman/listinfo/mvapich-discuss
> > >
> > 
> 
> -- 
>  
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-- 
Jonathan Perkins
http://www.cse.ohio-state.edu/~perkinjo
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