Merge remote-tracking branch 'nccl/master' into develop

src/include/graph.h

@@ -27,6 +27,7 @@ ncclResult_t ncclTopoComputePaths(struct ncclTopoSystem* system, struct ncclPeer
 void ncclTopoFree(struct ncclTopoSystem* system);
 ncclResult_t ncclTopoTrimSystem(struct ncclTopoSystem* system, struct ncclComm* comm);
 ncclResult_t ncclTopoComputeP2pChannels(struct ncclComm* comm);
+ncclResult_t ncclTopoGetNvbGpus(struct ncclTopoSystem* system, int rank, int* nranks, int** ranks);
 
 // Query topology
 ncclResult_t ncclTopoGetNetDev(struct ncclTopoSystem* system, int rank, struct ncclTopoGraph* graph, int channelId, int rr, int* net);