Re: [OMPI users] Sending relatively large messages with high frequency

Hi All, 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. Regards, Amr On Fri, Feb 26, 2010 at 7:45 AM, Prentice Bisbal wrote: > Amr Hassan wrote: > > Thanks alot for your reply, > > > > I'm using blocking

Re: [OMPI users] Sending relatively large messages with high frequency

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

Re: [OMPI users] Sending relatively large messages with high frequency

I was getting the same error a few weeks ago. In my case the error message was spot on. I was trying to put too much data in a buffer using MPI_Pack. I was able to track down the problem using valgrind. Have you tried that yet? You need to install valgrind first and then compile OpenMPI with

Re: [OMPI users] Sending relatively large messages with high frequency

Yes but only one thread at each client is allowed to use MPI. Also, there is a semaphore on the MPI usage. On Fri, Feb 26, 2010 at 1:09 AM, Brian Budge wrote: > Is your code multithreaded? > > On Feb 25, 2010 12:56 AM, "Amr Hassan" wrote: > >

Re: [OMPI users] Sending relatively large messages with high frequency

Is your code multithreaded? On Feb 25, 2010 12:56 AM, "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

Re: [OMPI users] Sending relatively large messages with high frequency

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

Re: [OMPI users] Sending relatively large messages with high frequency

We've seen similar things in our code. In our case it is probably due to a race condition. Try running the segv'ing process in a debugger, and it will likely show you a bug in your code On Feb 24, 2010 9:36 PM, "Amr Hassan" wrote: Hi All, I'm facing a strange problem

[OMPI users] Sending relatively large messages with high frequency

Hi All, I'm facing a strange problem with OpenMPI. I'm developing an application which is required to send a message from each client (1 MB each) to a server node for around 10 times per second (it's a distributed render application and I'm trying to reach a higher frame rate ). The problem is