Bhavesh: > 2. I was able to run GW150914 on development queue (68 cores) and the speeds > on Stampede were around 12.9M while that on KNL goes around 2.4M. To > understand the reason for such small speeds, I tried running this on higher > number of cores on Stampede (128) and it runs at speed of around 20.9M > (tested the run for 12 hours). However, on doing the same in normal queue in > KNL, the simulation crashes after a couple of iterations on KNL with some > segmentation fault error. Also, before crashing, the speed on KNL is around > 4.2M. I have attached the error file of the simulation.
FYI, I have seen the same with my code: it runs (very slowly) on a single KNL node, but it crashes immediately when running on more than 1 node. Curiously, I do not have the same problem on Marconi KNL, an Italian cluster with the same architecture/interconnect as Stampede KNL. Best wishes, David
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