Amr Hassan wrote: > Thanks alot for your reply, > > I'm using blocking Send and Receive. All the clients are sending data > and the server is receive the messages from the clients with > MPI_ANY_SOURCE as the sender. Do you think there is a race condition > near this pattern? > > I searched a lot and used totalview but I couldn't detect such case. I > really appreciate if you send me a link or give an example of a possible > race condition in that scenario . > > Also, when I partition the message into smaller parts (send in sequence > - all the other clients wait until the send finish) it works fine. is > that exclude the race condition? >
It sounds like, when sending the large messages, you are putting more data into a buffer than it can hold. When you break the messages up into smaller sizes, you're not overflowing the buffer. Are you using MPI_Pack, by any chance? -- Prentice Bisbal Linux Software Support Specialist/System Administrator School of Natural Sciences Institute for Advanced Study Princeton, NJ
