Re: [OMPI users] problems on parallel writing

Hi Jody, I tried your suggestion but it still failed. Attached is the modified code. If your machine has fortran compiler as well, you can try it. BTW, how many processors did you use for testing your C code? Thanks, Kan On Thu, Feb 25, 2010 at 3:35 AM, jody wrote: >

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] orte-checkpoint hangs

On Feb 10, 2010, at 9:45 AM, Addepalli, Srirangam V wrote: > I am trying to test orte-checkpoint with a MPI JOB. It how ever hangs for all > jobs. This is how i submit the job is started > mpirun -np 8 -mca ft-enable cr /apps/nwchem-5.1.1/bin/LINUX64/nwchem > siosi6.nw This might be the

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 highfrequency

On Feb 25, 2010, at 3:56 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 think there is a race condition near

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] libmpi.so.0 ERROR

This typically means that either libmpi.so does not exist on the machine that you are trying to run it on, or it cannot be found. You may need to extend the value of the LD_LIBRARY_PATH environment variable with the lib directory of your Open MPI installation (don't just overwrite it -- check

[OMPI users] libmpi.so.0 ERROR

Respected Users I have installed openmpi successfully also compiled the hello_world program with mpicc. But when I am running the exectable with the command mpirun -np 2 hello_mpi(hello_mpi is the executable) in my desktop pc(dual-core processor) is giving an error like this: hello_mpi: error

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] problems on parallel writing

Hi Just wanted to let you know: I translated your program to C ran it, and it crashed at MPI_FILE_SET_VIEW in a similar way than yours did. then i added an if-clause to prevent the call of MPI_FILE_WRITE with the undefined value. if (myid == 0) { MPI_File_write(fh, temp, count,

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