Hello,
I have this piece of code:
comm = MPI.COMM_WORLD
temp = np.zeros(blockSize*blockSize)
PrintNB("Communicate A to", get_left_rank())
comm.Sendrecv(sendbuf=np.ascontiguousarray(lA), dest=get_left_rank(),
recvbuf=temp)
lA = np.reshape(temp, (blockSize, blockSize))
PrintNB("Finished sending")
lA being a numpy array. Output is:
[0] Communicate A to 1
[2] Communicate A to 3
[3] Communicate A to 2
[1] Communicate A to 0
[1] Finished sending
# here it blocks
[n] is the rank. I have a circular send. 0>1, 1>0 and 2>3, 3>2. I understood
Sendrec so that it is made specifically for these cases, but still it
blocks.
What is the problem here?
Thanks!
Florian
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