Hi everybody! We are working on a new, experimental interconnection network (the EXTOLL network) and I am currently working on a MTL component for that hardware. Actually, it works quite good :-)
Recently I included the RDMA mpool component for memory registration caching into my code. Again, this works quite nicely and provides bandwidth improvements for large messages. I observed one problem though: If I turn on mpi_leave_pinned (and thus the registration cache is actually used), I see occasional memory corruption issues for example when I call MPI_Allreduce often. Debugging with valgrind did not lead to any clues, since OMPI refuses to run in that case. If I turn off mpi_leave_pinned, everything seems to be fine. I tested on version 1.3.3 and 1.3.4rc1. Do you have any suggestions how to investigate this situation? Thanks, Mondrian Nuessle -- Dr. Mondrian Nuessle Phone: +49 621 181 2717 University of Heidelberg Fax: +49 621 181 2713 Computer Architecture Group mailto:nues...@uni-hd.de http://ra.ziti.uni-heidelberg.de
