this line dgl/nccl_api.cu at master · dmlc/dgl · GitHub
why not use other CUDA stream like sparsePull method directly ?
Both of them are nullptr I think, so there’s no difference here. as the comments said, it’s TODO yet. Maybe it should be replaced by DeviceAPIManager::Get(ctx)->GetStream().
thx, I will try unit test it in 8gpu-v100
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