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.


[ROCm/rccl commit: 3c223c105a]

projects/rccl/src/debug.cc

@@ -1,5 +1,5 @@
 /*************************************************************************
- * Copyright (c) 2016-2021, NVIDIA CORPORATION. All rights reserved.
+ * Copyright (c) 2016-2022, NVIDIA CORPORATION. All rights reserved.
  *
  * See LICENSE.txt for license information
  ************************************************************************/
@@ -167,3 +167,19 @@ void ncclDebugLog(ncclDebugLogLevel level, unsigned long flags, const char *file
   }
   pthread_mutex_unlock(&ncclDebugLock);
 }
+
+NCCL_PARAM(SetThreadName, "SET_THREAD_NAME", 0);
+
+void ncclSetThreadName(pthread_t thread, const char *fmt, ...) {
+  // pthread_setname_np is nonstandard GNU extension
+  // needs the following feature test macro
+#ifdef _GNU_SOURCE
+  if (ncclParamSetThreadName() != 1) return;
+  char threadName[NCCL_THREAD_NAMELEN];
+  va_list vargs;
+  va_start(vargs, fmt);
+  vsnprintf(threadName, NCCL_THREAD_NAMELEN, fmt, vargs);
+  va_end(vargs);
+  pthread_setname_np(thread, threadName);
+#endif
+}