Hi, I have been using pyMPI to parallelize my code and found that the function mpi.send() leaks memory a lot and thus is not really working for large amount fo data communication. It actually fails after the leak accumulates more than 2G. I wonder if others have the same experience or I did something wrong. I compiled python 2.4, mpich 1.2.6, pyMPI 2.1b4 on Opteron cluster running Rocks 3.3. Here is a small test script with 2 CPUs to demo the memory leak:
import mpi n = 10000 i=0 data = [0]*40000 while i < n: if mpi.rank==1: mpi.send(data, 0) elif mpi.rank==0: msg, status = mpi.recv() n+=1 if one watchs the memory usage using 'top', one can see one process use little and constant amount of memory (recv for rank=0) and the other process uses more and more memory (send for rank=1). -- http://mail.python.org/mailman/listinfo/python-list
