KellenSunderland commented on issue #9609: Enable CPP unit tests in CI URL: https://github.com/apache/incubator-mxnet/pull/9609#issuecomment-361607662 @cjolivier01 Looks like cpp tests are looking good and ready to go aside from one test which I think might have some issues on virtualized environments: MEMORY_TEST - MemsetAndMemcopyPerformance tests performance by measuring time intervals relying on the system clock. I think this approach could have some issues in EC2. First precise time measurement is tricky in a virtualized environment (see refs). Secondly the VM may be pre-empted by the hypervisor which could give the appearance of a slower result. Neither of this issues would explain why the test is failing seemingly deterministically (I've run it 4-5 times now). What do you think, any reason you can think of for this test failing deterministically? Ref material: https://github.com/torvalds/linux/blob/v4.4/Documentation/virtual/kvm/timekeeping.txt https://www.vmware.com/pdf/vmware_timekeeping.pdf
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