On Jan 4, 2011, at 8:34 AM, Jeff Squyres wrote: > On Jan 3, 2011, at 5:14 PM, David Singleton wrote: > >> That message should only be 2MB. Are you sure its not a mismatch of >> message lengths in MPI_Bcast calls? > > +1 -- this is MB, not GB. The error message implies that one (or more?) MPI > processes provided a size that was too small to receive. Or, more > specifically, that not all MPI processes in the broadcast specified the same > (count,datatype) tuple.
DOH, sorry bad at math. I will inform the user to check his datatype and count, thanks guys. Brock > >> David >> >> On 01/04/2011 03:47 AM, Brock Palen wrote: >>> I have a user who reports that sending a broadcast of >>> >>> 540*1080 of reals (just over 2GB) fails with this: >>> >>> >>> *** An error occurred in MPI_Bcast >>> *** on communicator MPI_COMM_WORLD >>> *** MPI_ERR_TRUNCATE: message truncated >>> *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort) >>> >>> I was reading the archives and there appears to be an issue with large >>> messages. I was a little confused, is there a way to send messages larger >>> than 2GB? >>> >>> The user has access to some IB machines, per a note in the archives there >>> was an issue with writev() would this issue only be related to messages >>> over ethernet? >>> >>> Thanks just trying to get some clarification. >>> >>> Brock Palen >>> www.umich.edu/~brockp >>> Center for Advanced Computing >>> bro...@umich.edu >>> (734)936-1985 >>> >>> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users > > > -- > Jeff Squyres > jsquy...@cisco.com > For corporate legal information go to: > http://www.cisco.com/web/about/doing_business/legal/cri/ > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > >
