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. > 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/
