Fix ncclBroadcast ctran algo selection

Regina8023 · meta-codesync[bot] · commit 0bb846d7179f · 2025-10-27T11:46:50.000-07:00
Summary: If algo!=orig, we should use `ctranBroadcast`

Differential Revision: D85484348

fbshipit-source-id: 2dfb09a19a97c326800f0c9cb814e4a5f338bf84
diff --git a/comms/ncclx/v2_27/src/collectives.cc b/comms/ncclx/v2_27/src/collectives.cc
@@ -143,7 +143,7 @@ ncclResult_t ncclBroadcast(const void* sendbuff, void* recvbuff, size_t count, n
   }
 
   SetCudaDevRAII setCudaDev(comm->cudaDev);
-  if ((NCCL_BROADCAST_ALGO == NCCL_BROADCAST_ALGO::ctran) &&
+  if ((NCCL_BROADCAST_ALGO != NCCL_BROADCAST_ALGO::orig) &&
       ctranBroadcastSupport(comm->ctranComm_.get())) {
     return metaCommToNccl(ctranBroadcast(
         sendbuff, recvbuff, count, ncclToMetaComm(datatype), root, comm->ctranComm_.get(), stream));

Original file line number	Diff line number	Diff line change
`@@ -143,7 +143,7 @@ ncclResult_t ncclBroadcast(const void* sendbuff, void* recvbuff, size_t count, n`
`143`	`143`	`}`
`144`	`144`
`145`	`145`	`SetCudaDevRAII setCudaDev(comm->cudaDev);`
`146`		`- if ((NCCL_BROADCAST_ALGO == NCCL_BROADCAST_ALGO::ctran) &&`
	`146`	`+ if ((NCCL_BROADCAST_ALGO != NCCL_BROADCAST_ALGO::orig) &&`
`147`	`147`	`ctranBroadcastSupport(comm->ctranComm_.get())) {`
`148`	`148`	`return metaCommToNccl(ctranBroadcast(`
`149`	`149`	`sendbuff, recvbuff, count, ncclToMetaComm(datatype), root, comm->ctranComm_.get(), stream));`