2.13.4-1

Optimize CUDA graph launch; avoid launching a CPU callback for
intra-node operations.
Simplify kernel common code to improve the latency of send/recv
operations.
Strengthen CUDA streams semantics.
Change NET API to v6, to add dmabuf support.
Add ncclGetLastError() function.
Add ncclRemoteError code and use it for remote network errors.
Support the use of a different NCCL_NET parameter per communicator.
Add support for SHM and P2P transfers using cudaMemcpy.

src/include/debug.h

@@ -10,8 +10,8 @@
 #include "nccl_net.h"
 #include <stdio.h>
 #include <chrono>
+#include <type_traits>
 
-#include <sys/syscall.h>
 #include <limits.h>
 #include <string.h>
 #include <pthread.h>
@@ -21,7 +21,7 @@
 
 extern int ncclDebugLevel;
 extern uint64_t ncclDebugMask;
-extern pthread_mutex_t ncclDebugOutputLock;
+extern pthread_mutex_t ncclDebugLock;
 extern FILE *ncclDebugFile;
 extern ncclResult_t getHostName(char* hostname, int maxlen, const char delim);
 
@@ -29,13 +29,15 @@ void ncclDebugLog(ncclDebugLogLevel level, unsigned long flags, const char *file
 
 // Let code temporarily downgrade WARN into INFO
 extern thread_local int ncclDebugNoWarn;
+extern char ncclLastError[];
 
 #define WARN(...) ncclDebugLog(NCCL_LOG_WARN, NCCL_ALL, __FILE__, __LINE__, __VA_ARGS__)
 #define INFO(FLAGS, ...) ncclDebugLog(NCCL_LOG_INFO, (FLAGS), __func__, __LINE__, __VA_ARGS__)
+#define TRACE_CALL(...) ncclDebugLog(NCCL_LOG_TRACE, NCCL_CALL, __func__, __LINE__, __VA_ARGS__)
 
 #ifdef ENABLE_TRACE
 #define TRACE(FLAGS, ...) ncclDebugLog(NCCL_LOG_TRACE, (FLAGS), __func__, __LINE__, __VA_ARGS__)
-extern std::chrono::high_resolution_clock::time_point ncclEpoch;
+extern std::chrono::steady_clock::time_point ncclEpoch;
 #else
 #define TRACE(...)
 #endif