cjolivier01 commented on issue #9366: Refactor dropout operator to use ParallelRandom generator and also react deterministically when seeding URL: https://github.com/apache/incubator-mxnet/pull/9366#issuecomment-357107778 MKL seems to be quite a bit faster, trying to see how to reenable it and still be deterministic (it was not before) ================== = MKL ================== Timing: 50 iterations of 10 calls, shape = [1,1,28,28] = 784 items Dropout Operator CPU: Timing [Forward] 3.777 ms, avg: 0.007554 ms X 500 passes Timing: 50 iterations of 10 calls, shape = [1,3,28,28] = 2,352 items Dropout Operator CPU: Timing [Forward] 4.078 ms, avg: 0.008156 ms X 500 passes Timing: 50 iterations of 10 calls, shape = [50,1,18,32] = 28,800 items Dropout Operator CPU: Timing [Forward] 7.403 ms, avg: 0.014806 ms X 500 passes Timing: 50 iterations of 10 calls, shape = [50,3,18,32] = 86,400 items Dropout Operator CPU: Timing [Forward] 17.654 ms, avg: 0.035308 ms X 500 passes Timing: 50 iterations of 10 calls, shape = [20,3,128,128] = 983,040 items Dropout Operator CPU: Timing [Forward] 202.224 ms, avg: 0.404448 ms X 500 passes ================== = ParellelRandom Resource ================== Timing: 50 iterations of 10 calls, shape = [1,1,28,28] = 784 items Dropout Operator CPU: Timing [Forward] 15.212 ms, avg: 0.030424 ms X 500 passes Timing: 50 iterations of 10 calls, shape = [1,3,28,28] = 2,352 items Dropout Operator CPU: Timing [Forward] 31.348 ms, avg: 0.062696 ms X 500 passes Timing: 50 iterations of 10 calls, shape = [50,1,18,32] = 28,800 items Dropout Operator CPU: Timing [Forward] 390.813 ms, avg: 0.781626 ms X 500 passes Timing: 50 iterations of 10 calls, shape = [50,3,18,32] = 86,400 items Dropout Operator CPU: Timing [Forward] 1365.62 ms, avg: 2.73123 ms X 500 passes Timing: 50 iterations of 10 calls, shape = [20,3,128,128] = 983,040 items Dropout Operator CPU: Timing [Forward] 15731.5 ms, avg: 31.4629 ms X 500 passes
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