From 5d938d6f4742d2e92ea8bc6925492edb78d01e9c Mon Sep 17 00:00:00 2001 From: Qinghua Zhou Date: Fri, 3 Apr 2026 18:34:22 +0000 Subject: [PATCH] Update warning message for multi-node IB check --- python/test/test_alltoallv_mscclpp.py | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/python/test/test_alltoallv_mscclpp.py b/python/test/test_alltoallv_mscclpp.py index a9ebb6fd..e8797e43 100644 --- a/python/test/test_alltoallv_mscclpp.py +++ b/python/test/test_alltoallv_mscclpp.py @@ -174,7 +174,9 @@ def main(): print(f" IB devices: {ib_devices if ib_devices else 'NONE FOUND'}") print(f" MSCCLPP_SOCKET_IFNAME: {os.environ.get('MSCCLPP_SOCKET_IFNAME', '')}") if is_multi_node and not ib_devices: - print(f" WARNING: Multi-node detected but no IB devices! Cross-node will fail.") + print(f" NOTE: Multi-node detected but no IB devices. " + f"GB200 NVSwitch can handle cross-node without IB; " + f"on Hopper/Ampere IB is required.") # Also print from rank n_ranks_per_node (first rank on node 1) for comparison if is_multi_node and rank == n_ranks_per_node and _DEBUG: print(f" [Node 1] Hostname: {hostname}, rank={rank}")