> In your (or Sylvain's?) recent paper, you wrote less than one second > interval was useless. I've observed similar. I'm now evaluating the > performance with 0.2, 0.4, 1 and 4 second intervals for 5 second per > move setting on 19x19 board on 32 nodes of HA8000 cluster. >
Yes, one second is fine for 5 seconds per move. Maybe you can check if you have a linear speed-up if you artificially simulate a zero communication time ? My guess is that the communication time should not be a trouble, but if you don't use MPI, maybe there's something in your implementation of communications ? By the way, a cluster parallelization in MPI can be developped very quickly and MPI is efficient - mpi_all_reduce has a computational cost logarithmic in the number of nodes. Good luck, Olivier
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