YouhuiBai commented on issue #15674: Straggler in latest mxnet when training with distributed parameter server URL: https://github.com/apache/incubator-mxnet/issues/15674#issuecomment-532010392 @apeforest Very sorry, I forgot to check the gmail because it is uncommonly used. I used branch 1.5.0 ("current newest mxnet" as I said), and checked from version 1.0.0 to `master` branch, there is straggler. What can we do is just allocate the pinned memory for `comm_buf` rather than reuse the `merged`, which is pageable memory. Thanks a lot!
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