On Fri, Feb 26, 2010 at 7:45 AM, Prentice Bisbal
<prentice@ias.edu> wrote:
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?