b6475625fb
Add support for alternating rings, allow for cross-nic rings without cross-rail communication. Add support for user buffer registration for network send/recv. Optimize aggregated operations to better utilize all channels. Add flattening for BCM PCI gen5 switches. Add support for inter-node NVLink communication Add support for port fusion in NET/IB. Add support for ReduceScatter and AllGather using Collnet. Update net API to v8. Fix hang during A2A connection.
71 lines
3.5 KiB
C
71 lines
3.5 KiB
C
/*
|
|
* Copyright (c) 2017-2022, NVIDIA CORPORATION. All rights reserved.
|
|
*/
|
|
|
|
#ifndef NCCL_NET_V6_H_
|
|
#define NCCL_NET_V6_H_
|
|
|
|
#define NCCL_NET_MAX_REQUESTS_V6 8
|
|
|
|
typedef struct {
|
|
char* name; // Used mostly for logging.
|
|
char* pciPath; // Path to the PCI device in /sys.
|
|
uint64_t guid; // Unique identifier for the NIC chip. Important for
|
|
// cards with multiple PCI functions (Physical or virtual).
|
|
int ptrSupport; // [NCCL_PTR_HOST|NCCL_PTR_CUDA|NCCL_PTR_DMABUF]
|
|
int speed; // Port speed in Mbps.
|
|
int port; // Port number.
|
|
float latency; // Network latency
|
|
int maxComms; // Maximum number of comms we can create
|
|
int maxRecvs; // Maximum number of grouped receives.
|
|
}ncclNetProperties_v6_t;
|
|
|
|
typedef struct {
|
|
// Name of the network (mainly for logs)
|
|
const char* name;
|
|
// Initialize the network.
|
|
ncclResult_t (*init)(ncclDebugLogger_t logFunction);
|
|
// Return the number of adapters.
|
|
ncclResult_t (*devices)(int* ndev);
|
|
// Get various device properties.
|
|
ncclResult_t (*getProperties)(int dev, ncclNetProperties_v6_t* props);
|
|
// Create a receiving object and provide a handle to connect to it. The
|
|
// handle can be up to NCCL_NET_HANDLE_MAXSIZE bytes and will be exchanged
|
|
// between ranks to create a connection.
|
|
ncclResult_t (*listen)(int dev, void* handle, void** listenComm);
|
|
// Connect to a handle and return a sending comm object for that peer.
|
|
// This call must not block for the connection to be established, and instead
|
|
// should return successfully with sendComm == NULL with the expectation that
|
|
// it will be called again until sendComm != NULL.
|
|
ncclResult_t (*connect)(int dev, void* handle, void** sendComm);
|
|
// Finalize connection establishment after remote peer has called connect.
|
|
// This call must not block for the connection to be established, and instead
|
|
// should return successfully with recvComm == NULL with the expectation that
|
|
// it will be called again until recvComm != NULL.
|
|
ncclResult_t (*accept)(void* listenComm, void** recvComm);
|
|
// Register/Deregister memory. Comm can be either a sendComm or a recvComm.
|
|
// Type is either NCCL_PTR_HOST or NCCL_PTR_CUDA.
|
|
ncclResult_t (*regMr)(void* comm, void* data, int size, int type, void** mhandle);
|
|
/* DMA-BUF support */
|
|
ncclResult_t (*regMrDmaBuf)(void* comm, void* data, size_t size, int type, uint64_t offset, int fd, void** mhandle);
|
|
ncclResult_t (*deregMr)(void* comm, void* mhandle);
|
|
// Asynchronous send to a peer.
|
|
// May return request == NULL if the call cannot be performed (or would block)
|
|
ncclResult_t (*isend)(void* sendComm, void* data, int size, int tag, void* mhandle, void** request);
|
|
// Asynchronous recv from a peer.
|
|
// May return request == NULL if the call cannot be performed (or would block)
|
|
ncclResult_t (*irecv)(void* recvComm, int n, void** data, int* sizes, int* tags, void** mhandles, void** request);
|
|
// Perform a flush/fence to make sure all data received with NCCL_PTR_CUDA is
|
|
// visible to the GPU
|
|
ncclResult_t (*iflush)(void* recvComm, int n, void** data, int* sizes, void** mhandles, void** request);
|
|
// Test whether a request is complete. If size is not NULL, it returns the
|
|
// number of bytes sent/received.
|
|
ncclResult_t (*test)(void* request, int* done, int* sizes);
|
|
// Close and free send/recv comm objects
|
|
ncclResult_t (*closeSend)(void* sendComm);
|
|
ncclResult_t (*closeRecv)(void* recvComm);
|
|
ncclResult_t (*closeListen)(void* listenComm);
|
|
} ncclNet_v6_t;
|
|
|
|
#endif // end include guard
|