This thread digressed significantly from the original bug report; I did not realize that the discussion was revolving around the fact that MPI_THREAD_MULTIPLE no longer works *at all*.
So here's where we are: 1. MPI_THREAD_MULTIPLE doesn't work, even if you --enable-mpi-thread-multiple 2. It seems that 2c8087d10b10e0efea176db8907de2720a55454e and 09b867374e9618007b81bfaf674ec6df04548bed need to be reverted (in that order) 3. That restores MPI_THREAD_MULTIPLE functionality (if you --enable-mpi-thread-multiple) 4. However, this brings back the performance problem, too I've looked at this all day so far, and am unfortunately just out of time -- I have some crushing SC deadlines that I *must* meet. :-( Nathan will be picking up where I left off later today to see if there's a simple way to fix just the performance issue for the non-THREAD_MULTIPLE cases. On Nov 4, 2014, at 12:15 PM, Alina Sklarevich <ali...@dev.mellanox.co.il> wrote: > Hi, > > We observe a hang when running the multi-threading support test "latency.c" > (attached to this report), which uses MPI_THREAD_MULTIPLE. > > The hang happens immediately at the begining of the test and is reproduced in > the v1.8 release branch. > > The command line to reproduce the behavior is: > > $ mpirun --map-by node --bind-to core -display-map -np 2 -mca pml ob1 -mca > btl tcp,self ./thread-tests-1.1/latency > > The last commit with which the hang doesn't reproduce is: > commit: e4d4266d9c69e > > > > And problems begin after commit: > > > > commit 09b867374e9618007b81bfaf674ec6df04548bed > > Author: Jeff Squyres <jsquy...@cisco.com> > > Date: Fri Oct 31 12:42:50 2014 -0700 > > > > Revert most of open-mpi/ompi@6ef938de3fa9ca0fed2c5bcb0736f65b0d8803af > > > > Is this expected behavior? In other words, should we not expect any stable > release in the 1.8.x series to be able to use MPI_THREAD_MULTIPLE with even > the TCP and SM BTLs? > > > > Please advise. > > > > Thanks, > > Alina. > > > > > > <latency.c>_______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2014/11/16175.php -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
