2.18.3-1

Fix data corruption with Tree/LL128 on systems with 1GPU:1NIC.
Fix hang with Collnet on bfloat16 on systems with less than one NIC
per GPU.
Fix long initialization time.
Fix data corruption with Collnet when mixing multi-process and
multi-GPU per process.
Fix crash when shared memory creation fails.
Fix Avg operation with Collnet/Chain.
Fix performance of alltoall at scale with more than one NIC per GPU.
Fix performance for DGX H800.
Fix race condition in connection progress causing a crash.
Fix network flush with Collnet.
Fix performance of aggregated allGather/reduceScatter operations.
Fix PXN operation when CUDA_VISIBLE_DEVICES is set.
Fix NVTX3 compilation issues on Debian 10.


[ROCm/rccl commit: ea38312273]

projects/rccl/src/misc/socket.cc

@@ -421,6 +421,9 @@ static ncclResult_t socketFinalizeAccept(struct ncclSocket* sock) {
   uint64_t magic;
   enum ncclSocketType type;
   int received = 0;
+  const int one = 1;
+  SYSCHECK(setsockopt(sock->fd, IPPROTO_TCP, TCP_NODELAY, (char*)&one, sizeof(int)), "setsockopt");
+
   NCCLCHECK(ncclSocketProgress(NCCL_SOCKET_RECV, sock, &magic, sizeof(magic), &received));
   if (received == 0) return ncclSuccess;
   NCCLCHECK(socketWait(NCCL_SOCKET_RECV, sock, &magic, sizeof(magic), &received));