Here is the output of the "ompi_info --param btl openib": MCA btl: parameter "btl_openib_flags" (current value: <306>, data source: default value) BTL bit flags (general flags: SEND=1, PUT=2, GET=4, SEND_INPLACE=8, RDMA_MATCHED=64, HETEROGENEOUS_RDMA=256; flags only used by the "dr" PML (ignored by others): ACK=16, CHECKSUM=32, RDMA_COMPLETION=128; flags only used by the "bfo" PML (ignored by others): FAILOVER_SUPPORT=512)
So the 305 flags means: HETEROGENEOUS_RDMA | CHECKSUM | ACK | SEND. Most of these flags are totally useless in the current version of Open MPI (DR is not supported), so the only value that really matter is SEND | HETEROGENEOUS_RDMA. If you want to enable the send protocol try first with SEND | SEND_INPLACE (9), if not downgrade to SEND (1) george. On May 16, 2011, at 11:33 , Samuel K. Gutierrez wrote: > > On May 16, 2011, at 8:53 AM, Brock Palen wrote: > >> >> >> >> On May 16, 2011, at 10:23 AM, Samuel K. Gutierrez wrote: >> >>> Hi, >>> >>> Just out of curiosity - what happens when you add the following MCA option >>> to your openib runs? >>> >>> -mca btl_openib_flags 305 >> >> You Sir found the magic combination. > > :-) - cool. > > Developers - does this smell like a registered memory availability hang? > >> I verified this lets IMB and CRASH progress pass their lockup points, >> I will have a user test this, > > Please let us know what you find. > >> Is this an ok option to put in our environment? What does 305 mean? > > There may be a performance hit associated with this configuration, but if it > lets your users run, then I don't see a problem with adding it to your > environment. > > If I'm reading things correctly, 305 turns off RDMA PUT/GET and turns on SEND. > > OpenFabrics gurus - please correct me if I'm wrong :-). > > Samuel Gutierrez > Los Alamos National Laboratory > > >> >> >> Brock Palen >> www.umich.edu/~brockp >> Center for Advanced Computing >> bro...@umich.edu >> (734)936-1985 >> >>> >>> Thanks, >>> >>> Samuel Gutierrez >>> Los Alamos National Laboratory >>> >>> On May 13, 2011, at 2:38 PM, Brock Palen wrote: >>> >>>> On May 13, 2011, at 4:09 PM, Dave Love wrote: >>>> >>>>> Jeff Squyres <jsquy...@cisco.com> writes: >>>>> >>>>>> On May 11, 2011, at 3:21 PM, Dave Love wrote: >>>>>> >>>>>>> We can reproduce it with IMB. We could provide access, but we'd have to >>>>>>> negotiate with the owners of the relevant nodes to give you interactive >>>>>>> access to them. Maybe Brock's would be more accessible? (If you >>>>>>> contact me, I may not be able to respond for a few days.) >>>>>> >>>>>> Brock has replied off-list that he, too, is able to reliably reproduce >>>>>> the issue with IMB, and is working to get access for us. Many thanks >>>>>> for your offer; let's see where Brock's access takes us. >>>>> >>>>> Good. Let me know if we could be useful >>>>> >>>>>>>> -- we have not closed this issue, >>>>>>> >>>>>>> Which issue? I couldn't find a relevant-looking one. >>>>>> >>>>>> https://svn.open-mpi.org/trac/ompi/ticket/2714 >>>>> >>>>> Thanks. In csse it's useful info, it hangs for me with 1.5.3 & np=32 on >>>>> connectx with more than one collective I can't recall. >>>> >>>> Extra data point, that ticket said it ran with mpi_preconnect_mpi 1, well >>>> that doesn't help here, both my production code (crash) and IMB still hang. >>>> >>>> >>>> Brock Palen >>>> www.umich.edu/~brockp >>>> Center for Advanced Computing >>>> bro...@umich.edu >>>> (734)936-1985 >>>> >>>>> >>>>> -- >>>>> Excuse the typping -- I have a broken wrist >>>>> >>>>> _______________________________________________ >>>>> users mailing list >>>>> us...@open-mpi.org >>>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>>>> >>>>> >>>> >>>> >>>> _______________________________________________ >>>> users mailing list >>>> us...@open-mpi.org >>>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>> >>> >>> _______________________________________________ >>> users mailing list >>> us...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/users >>> >>> >> >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users George Bosilca Research Assistant Professor Innovative Computing Laboratory Department of Electrical Engineering and Computer Science University of Tennessee, Knoxville http://web.eecs.utk.edu/~bosilca/