On my system, mpirun -np 8 -mca btl_sm_num_fifos 7 is much slower (and appeared to hang after several thousand interations) than -mca btl ^sm
Is there another better way I should be modifying fifos to get better performance? Matt On Dec 11, 2009, at 4:04 AM, Terry Dontje wrote: >> >> Date: Thu, 10 Dec 2009 17:57:27 -0500 >> From: Jeff Squyres <jsquy...@cisco.com> >> >> On Dec 10, 2009, at 5:53 PM, Gus Correa wrote: >> >> >>> > How does the efficiency of loopback >>> > (let's say, over TCP and over IB) compare with "sm"? >>> >> >> Definitely not as good; that's why we have sm. :-) I don't have any >> quantification of that assertion, though (i.e., no numbers to back that up). >> >> > However, as Eugene wrote earlier you can actually increase the number of > fifos used by the SM and avoid the hang that way. Unless you are really > strapped for memory I think that would be the best way to go. > > --td > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users _________________________________ Matthew MacManes PhD Candidate University of California- Berkeley Museum of Vertebrate Zoology Phone: 510-495-5833 Lab Website: http://ib.berkeley.edu/labs/lacey Personal Website: http://macmanes.com/
