2.24.3-1

Network user buffer support for collectives
 * Leverage user buffer registration to achieve zero-copy
   inter-node communications for Ring, NVLS and Collnet

Add RAS subsystem
 * Create a RAS thread keeping track of all NCCL communicators.
 * Add a ncclras tool contacting the RAS thread and getting a
   report.

Add fp8 support
 * Add support for e5m2 and e4m3 8-bit floating point operations.
 * Use Tree/PAT algorithms when possible for better numerical
   stability.

Add NIC fusion
 * Add a NET API to ask the network plugin to fuse a set of
   interfaces together.
 * Fuse multiple NICs under the same PCI switch as a single,
   larger NIC.

Socket connection failure retry
 * Retry in case of socket connection failure (unreachable host)
 * Avoid "Software caused connection abort" errors on retries

QP connection failure retry
 * Retry in case of IB QP connection failure during ibv_modify_qp.

NET API improvements
 * Allow plugins to force a flush in case data and completion
   ordering is not guaranteed.
 * Indicate when completion is not needed (e.g. for the LL128
   protocol), allowing plugins to skip generating a completion.
 * Allow for full offload of allgather operations when using one
   GPU per node.

NCCL_ALGO/NCCL_PROTO strict enforcement
 * Extend NCCL_ALGO/NCCL_PROTO syntax to be able to specify
   ALGO/PROTO filters for each collective operation.
 * Strictly enforce the ALGO/PROTO filters, no longer fall back
   on the ring algorithm when the filtering leaves no option and
   error out instead.

Enable CUMEM host allocations
 * Use cumem functions for host memory allocation by default.

Improved profiler plugin API
 * Avoid dependencies with NCCL includes.
 * Add information on whether the buffer is registered or not

Adjust PAT tuning
 * Improve transition between PAT and ring at scale.

Fix hangs when running with different CPU architectures
 * Detect when we use a mix of GPU architectures
 * Ensure Algo/Proto decisions are made based on that unified
   state.

Fix FD leak in UDS
 * Fix a leak when mapping buffers intra-node with cumem IPCs.

Fix crash when mixing buffer registration and graph buffer registration.
 * Separate local and graph registration to avoid crashes when we free
   buffers.

Fix user buffer registration with dmabuf
 * Make ncclSend/ncclRecv communication with buffer registration functional
   on network plugins relying on dmabuf for buffer registration.

Fix crash in IB code caused by uninitialized fields.

Fix non-blocking ncclSend/ncclRecv
 * Fix case where ncclSend/ncclRecv would return ncclSuccess in non-blocking
   mode even though the operation was not enqueued onto the stream.
 * Issue #1495

Various compiler tweaks and fixes
 * PR #758

Fix typo in ncclTopoPrintGraph
 * Issue #1468


[ROCm/rccl commit: 6aae379278]

projects/rccl/src/include/register.h

@@ -6,6 +6,9 @@
 #include <cuda.h>
 #include <stdint.h>
 
+int64_t ncclParamLocalRegister();
+int64_t ncclParamGraphRegister();
+
 enum {
   NET_REG_COMPLETE = 0x01,
   NVLS_REG_COMPLETE = 0x02,
@@ -20,16 +23,21 @@ struct ncclPeerRegIpcAddr {
   uintptr_t* hostPeerRmtAddrs;
 };
 
+struct ncclRegNetHandles {
+  void* handle;
+  struct ncclProxyConnector* proxyConn;
+  struct ncclRegNetHandles* next;
+};
+
 struct ncclReg {
   // common attributes
   size_t pages;
-  int refs;
+  int localRefs;
+  int graphRefs;
   uintptr_t addr;
   uint32_t state;
   // net reg
-  int nDevs;
-  int devs[MAXCHANNELS];
-  void** handles;
+  struct ncclRegNetHandles* netHandleHead;
   // nvls reg
   uintptr_t baseAddr;
   size_t baseSize;
@@ -50,11 +58,12 @@ struct ncclRegCache {
   struct ncclReg **slots;
   int capacity, population;
   uintptr_t pageSize;
-  void* sComms[MAXCHANNELS];
-  void* rComms[MAXCHANNELS];
 };
 
 ncclResult_t ncclRegCleanup(struct ncclComm* comm);
 ncclResult_t ncclRegFind(struct ncclComm* comm, const void* data, size_t size, struct ncclReg** reg);
+ncclResult_t ncclCommGraphRegister(const ncclComm_t comm, void* buff, size_t size, void** handle);
+ncclResult_t ncclCommGraphDeregister(const ncclComm_t comm, struct ncclReg *handle);
+ncclResult_t ncclRegLocalIsValid(struct ncclReg *reg, bool *isValid);
 
 #endif