From 0fb000932ff8bb9cf299acd9484961bbd772f5a2 Mon Sep 17 00:00:00 2001
From: Wenkai Du <43822138+wenkaidu@users.noreply.github.com>
Date: Mon, 13 Jun 2022 06:39:05 -0700
Subject: [PATCH] Change default nchannels per peer (#563)

[ROCm/rccl commit: f274c865c1258900e86949257f42451d8d34e29a]
---
 projects/rccl/src/graph/paths.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/projects/rccl/src/graph/paths.cc b/projects/rccl/src/graph/paths.cc
index 6ba2621dc7..762c6a639c 100644
--- a/projects/rccl/src/graph/paths.cc
+++ b/projects/rccl/src/graph/paths.cc
@@ -707,7 +707,7 @@ void ncclTopoFree(struct ncclTopoSystem* system) {
   free(system);
 }
 
-NCCL_PARAM(NChannelsPerNetPeer, "NCHANNELS_PER_NET_PEER", 2);
+NCCL_PARAM(NChannelsPerNetPeer, "NCHANNELS_PER_NET_PEER", 1);
 
 static ncclResult_t ncclTopoGetNchannels(struct ncclTopoSystem* system, int g /*local gpu index*/, int peerRank, int* nChannels) {
   int peer;