On Jun 27, 2012, at 2:25 PM, Martin Siegert wrote: >> http://www.open-mpi.org/~jsquyres/unofficial/openmpi-1.6.1ticket3131r26612M.tar.bz2 > > Thanks! I tried this and, indeed, the program (I tested quantum espresso, > pw.x, so far) no longer hangs.
Good! We're doing a bit more definitive testing here (took a little while to figure out how to do that, but we're in process of doing that now...) before we let this go out into the wild. > Then I went one step further and benchmarked the following three cases: > > 1) pw.x compiled with openmpi-1.3.3 > 2) pw.x compiled with openmpi-1.4.3 and > btl_openib_flags = 305 > btl_openib_eager_limit = 65536 > in etc/openmpi-mca-params.conf > 3) pw.x compiled with openmpi-1.6.1ticket3131r26612M > > These are the results time (in seconds) per iteration - smaller is better: > 1) 33.11 > 2) 28.23 > 3) 34.81 > > That's rather disappointing, isn't it? Yes, it is. But #2 is not really comparable with #1 and #3. It's quite possible that with newer IB hardware, the eager limit should be bumped up by default. I leave this to Mellanox to figure out... -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
