Thanks a lot for your support. It was a big help. I found a race condition in my code and now the problem is solved.
Amr Hassan wrote:It sounds like, when sending the large messages, you are putting more
> 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?
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?
Linux Software Support Specialist/System Administrator
School of Natural Sciences
Institute for Advanced Study
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