2.12.7-1

Add network communication through another GPU connected with NVLink
(PXN).
Add aggregation of messages coming from different local GPUs through
PXN and going to the same destination.
Add new v5 plugin API with grouped receives and tags.
Add compat for v4 plugins.
Add naming of NCCL threads to help debugging.
Fix NVLink detection and avoid data corruption when some NVLinks are
down.
Add support for Relaxed Ordering for IB.
Add profiling and timing infrastructure.

src/include/debug.h

@@ -1,5 +1,5 @@
 /*************************************************************************
- * Copyright (c) 2015-2019, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2015-2022, NVIDIA CORPORATION. All rights reserved.
  *
  * See LICENSE.txt for license information
  ************************************************************************/
@@ -16,6 +16,9 @@
 #include <string.h>
 #include <pthread.h>
 
+// Conform to pthread and NVTX standard
+#define NCCL_THREAD_NAMELEN 16
+
 extern int ncclDebugLevel;
 extern uint64_t ncclDebugMask;
 extern pthread_mutex_t ncclDebugOutputLock;
@@ -37,4 +40,6 @@ extern std::chrono::high_resolution_clock::time_point ncclEpoch;
 #define TRACE(...)
 #endif
 
+void ncclSetThreadName(pthread_t thread, const char *fmt, ...);
+
 #endif