pengzhao-intel commented on issue #11998: Flaky test MKLDNN_BASE.MKLDNNSum URL: https://github.com/apache/incubator-mxnet/issues/11998#issuecomment-411345971 In short, the CPP test case mixed the usage of MXNET OP and C/C++ function where the MXNET OP is executed with async mode and C function will run directly. So, this will bypass the dependency engine and then cause the data race. In concluding, this is **NOT** the bug in MKLDNN or dependency engine. Just a not common implementation of the test case.
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