On Wed, Aug 29, 2007 at 04:48:07PM +0300, Gleb Natapov wrote: > Is this trunk or 1.2? Oops. I should read more carefully :) This is trunk.
> > On Wed, Aug 29, 2007 at 09:40:30AM -0400, Terry D. Dontje wrote: > > I have a program that does a simple bucket brigade of sends and receives > > where rank 0 is the start and repeatedly sends to rank 1 until a certain > > amount of time has passed and then it sends and all done packet. > > > > Running this under np=2 always works. However, when I run with greater > > than 2 using only the SM btl the program usually hangs and one of the > > processes has a long stack that has a lot of the following 3 calls in it: > > > > [25] opal_progress(), line 187 in "opal_progress.c" > > [26] mca_btl_sm_component_progress(), line 397 in "btl_sm_component.c" > > [27] mca_bml_r2_progress(), line 110 in "bml_r2.c" > > > > When stepping through the ompi_fifo_write_to_head routine it looks like > > the fifo has overflowed. > > > > I am wondering if what is happening is rank 0 has sent a bunch of > > messages that have exhausted the > > resources such that one of the middle ranks which is in the process of > > sending cannot send and therefore > > never gets to the point of trying to receive the messages from rank 0? > > > > Is the above a possible scenario or are messages periodically bled off > > the SM BTL's fifos? > > > > Note, I have seen np=3 pass sometimes and I can get it to pass reliably > > if I raise the shared memory space used by the BTL. This is using the > > trunk. > > > > > > --td > > > > > > _______________________________________________ > > devel mailing list > > de...@open-mpi.org > > http://www.open-mpi.org/mailman/listinfo.cgi/devel > > -- > Gleb. > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel -- Gleb.
