2.23.4-1

Add scalable init API
 * Add new ncclCommInitRankScalable to allow for passing multiple
   unique IDs to the init function.
 * Spreads the load onto multiple bootstrap roots, allowing for
   constant bootstrap time.
 * Requires multiple ranks to create a unique ID, and the CPU-side
   ID exchange code to call allgather[v] instead of broadcast.

Accelerate init bootstrap operations
 * Reduce the number of calls to allgather.
 * Allow roots to reply early to ranks when information is already
   available.
 * Add an option to use ncclNet instead of sockets to perform
   bootstrap allgather operations.

Add PAT algorithms for Allgather and ReduceScatter
 * Parallel Aggregated Trees, variation of Bruck algorithm.
 * Logarithmic number of network steps for small sizes at scale.
 * Only supports one rank per node at the moment.

Add support for registered buffers for intra-node communication.
 * Allow registered user buffers to be accessed directly intra-node
 * Avoids extra copies in algorithms which permit it, saving
   memory bandwidth and helping with compute overlap.

Add profiler plugin API
 * New plugin API for profiling
 * Supports various levels of profiling, with a hierarchy.

Asynchronous graph allocation
 * Make calls to cudaMalloc and cudaMemcpy during graph allocation
   asynchronous.
 * Significantly speeds up graph capture.

Use fatal IB asynchronous events to stop network operation
 * Avoids many other error messages
 * Only fatal errors are affected; potentially transient errors
   (e.g. port down) do not cause an immediate stop.

Set P2P level to PXB on AMD CPUs when using more than 2 GPUs per node
 * P2P would cause a significant performance degradation when using
   many GPUs, and therefore many interleaved data flows.
 * Disable P2P through the CPU when we have 3+ GPUs per node; keep it
   enabled when we only have 2 GPUs.

Improve the init logs to report the real NCCL function.
 * Make the log report ncclCommInitRank or ncclCommSplit, rather than
   the generic ncclCommInitRankFunc.

Add a parameter to set the location of the user configuration file.
 * Add NCCL_CONF_FILE environment variable to set where the user's
   configuration file resides.

Increase default IB timeout
 * Increase IB timeout value from 18 to 20.
 * Should help avoid fatal errors on large RoCE systems.

Add new check for nvidia peermem
 * On linux kernels 6.6+, /sys/kernel/mm/memory_peers is no longer
   present; check for /sys/module/nvidia_peermem/version instead.

Fix old performance regression when mixing small and large operations.
 * Improves distribution of work on channels.

Fix crash when NUMA IDs are equal to -1.
 * Can happen when a NIC is a virtual NIC, or when linux doesn't
   know which NUMA node a device is attached to
 * Issue NVIDIA/nccl-tests#233

Fix tree graph search when NCCL_CROSS_NIC is set to 1.
 * Would force NCCL to use the balanced_tree pattern, thereby
   disabling LL128 on platforms with 1 GPU+1 NIC per PCI switch.
 * Would also try to use alternate rings even though it was not
   needed.

Compiler tweaks and fixes
 * PR #1177
 * PR #1228

Fix stack smash
 * PR #1325

Fixes for multi-node NVLink + IB operation

Coverity fixes and comments.


[ROCm/rccl commit: 68b542363f]

projects/rccl/src/include/profiler.h

@@ -4,34 +4,52 @@
  * See LICENSE.txt for license information
  ************************************************************************/
 
-#ifndef NCCL_PROFILER_H_
-#define NCCL_PROFILER_H_
+#ifndef PROFILER_H_
+#define PROFILER_H_
 
-#include "proxy.h"
+#include <cuda_runtime.h>
+#include "nccl_profiler.h"
 
-enum ncclProxyProfileState {
-  ncclProxyProfileBegin = 0,
+struct ncclProxyArgs;
+struct ncclKernelPlan;
+struct ncclTaskColl;
+struct ncclTaskP2p;
+struct ncclInfo;
+struct ncclComm;
+struct ncclProxyOp;
 
-  ncclProxyProfileSendGPUWait = 1,
-  ncclProxyProfileSendWait = 2,
+// Plugin Init/Finalize Wrappers
+ncclResult_t ncclProfilerPluginInit(struct ncclComm* comm);
+ncclResult_t ncclProfilerPluginFinalize(struct ncclComm* comm);
 
-  ncclProxyProfileRecvWait = 1,
-  ncclProxyProfileRecvFlushWait = 2,
-  ncclProxyProfileRecvGPUWait = 3,
+// Profiler Start/Stop Group Wrappers
+ncclResult_t ncclProfilerStartGroupEvent(struct ncclKernelPlan* plan);
+ncclResult_t ncclProfilerStopGroupEvent(struct ncclKernelPlan* plan);
 
-  ncclProxyProfileEnd = 4,
+// Profiler Start/Stop Task Events Wrappers
+ncclResult_t ncclProfilerStartTaskEvents(struct ncclKernelPlan* plan);
+ncclResult_t ncclProfilerStopTaskEvents(struct ncclKernelPlan* plan);
 
-  ncclProxyProfileSleep = 8,
-  ncclProxyProfileWakeup = 9,
+// Proxy Op Start/Stop Event Wrappers
+ncclResult_t ncclProfilerStartSendProxyOpEvent(int sub, struct ncclProxyArgs* args);
+ncclResult_t ncclProfilerStartRecvProxyOpEvent(int sub, struct ncclProxyArgs* args);
+ncclResult_t ncclProfilerStopProxyOpEvent(int sub, struct ncclProxyArgs* args);
 
-  ncclProxyProfileIdle = 16,
-  ncclProxyProfileActive = 17,
+// Proxy Step Start/Stop Event Wrappers
+ncclResult_t ncclProfilerStartSendProxyStepEvents(int sub, struct ncclProxyArgs* args, uint64_t stepLo, uint64_t stepHi);
+ncclResult_t ncclProfilerStartRecvProxyStepEvents(int sub, struct ncclProxyArgs* args, uint64_t stepLo, uint64_t stepHi);
+ncclResult_t ncclProfilerStopProxyStepEvents(int sub, struct ncclProxyArgs* args, uint64_t stepLo, uint64_t stepHi);
 
-  ncclProxyProfileAppend = 24,
-  ncclProxyProfileAppendEnd = 25
-};
+// Proxy Control Start/Stop Events Wrappers
+ncclResult_t ncclProfilerStartProxyCtrlEvent(void* profilerContext, void** eHandle);
+ncclResult_t ncclProfilerStopProxyCtrlEvent(void* eHandle);
 
-ncclResult_t ncclProfilingRecord(struct ncclProxyArgs* args, int sub, int step, int state);
-void ncclProfilingDump();
+// Record Event Wrappers
+ncclResult_t ncclProfilerRecordProxyOpEventState(int sub, struct ncclProxyArgs* args, int steps, size_t transSize, ncclProfilerEventState_t eState);
+ncclResult_t ncclProfilerRecordProxyStepEventStates(int sub, struct ncclProxyArgs* args, uint64_t stepLo, uint64_t stepHi, ncclProfilerEventState_t eState);
+ncclResult_t ncclProfilerRecordProxyCtrlEventState(void*eHandle, int appended, ncclProfilerEventState_t eState);
+
+// Profiler utility functions
+ncclResult_t ncclProfilerAddPidToProxyOp(struct ncclProxyOp* op);
 
 #endif