Hi All, I found that I_MPI_ADJUST option can be used to test the performance improvement by changing the algorithm of MPI communication. I also
Moreover, the two-step MPI_Reduce/MPI_Bcast approach works out even with the MPI_IN_PLACE used. The typical dimension of N in our case is ~500000-800000. In principle, I might try to check whether this problem is related to the default I_MPI_ADJUST_ALLREDUCE setting. What do you th...
Try running with I_MPI_ADJUST_BCAST=1, and see if that makes a difference. Translate 0 Kudos Copy link Reply Wee_Beng_T_ Beginner 12-04-2015 06:27 PM 4,165 Views Hi, Just tried ... same problem, it hangs there. Translate 0 Kudos Copy link Reply Arvid_I_ Beginner ...
Is there a way with Intel MPI 19 to see what the I_MPI_ADJUST_* values are set to? With Intel 18.0.5, I see a lot like: [0] MPI startup(): Gather: 3: 3073-16397 & 129-2147483647 [0] MPI startup(): Gather: 2: 16398-65435 & 129-2147483647 [0] MPI s...
Is there a way with Intel MPI 19 to see what the I_MPI_ADJUST_* values are set to? With Intel 18.0.5, I see a lot like: [0] MPI startup(): Gather: 3: 3073-16397 & 129-2147483647 [0] MPI startup(): Gather: 2: 16398-65435 & 129-2147483647 [0] MPI s...