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Fix GPU Direct RDMA detection.

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Whether the network supported GPU Direct RDMA or not was ignored,
causing sockets to break when cards were local enough that NCCL
tried to use it.
This commit is contained in:
Sylvain Jeaugey 2018-12-04 14:42:28 -08:00
parent b8a9a32ccb
commit 4b39a4cf91
1 changed files with 1 additions and 1 deletions
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2
src/transport/net.cu
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@ -241,7 +241,7 @@ static ncclResult_t netGetGdrSupport(int dev, int distance, int read, int* useGd
// Finally, check if the NIC supports it
int flags;
NCCLCHECK(ncclNetPtrSupport(dev, &flags));
if (flags & NCCL_PTR_CUDA == 0) return ncclSuccess;
if ((flags & NCCL_PTR_CUDA) == 0) return ncclSuccess;
*useGdr = 1;
INFO(NCCL_INIT|NCCL_NET,"NET/%s : GPU Direct RDMA Enabled for GPU %d / HCA %d (distance %d >= %d), read %d", ncclNetName(), cudaDev, dev, distance, netGdrLevel, read);
return ncclSuccess;