5d3ab08b69
Add new NVLS algorithm for allreduce using NVLink SHARP (intra-node only). Add new config options: cgaClusterSize, minCTAs, maxCTAs, netName. Enable LL128 when we use PXN to close rings. NVTX3 includes update. Fix crash when one CollNet (SHARP) rail fails to initialize.
840 lines
37 KiB
C++
840 lines
37 KiB
C++
/*************************************************************************
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* Copyright (c) 2016-2022, NVIDIA CORPORATION. All rights reserved.
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*
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* See LICENSE.txt for license information
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************************************************************************/
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#include "comm.h"
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#include "coll_net.h"
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#include "graph.h"
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#include "proxy.h"
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#include "gdrwrap.h"
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int64_t ncclParamGdrCopySyncEnable();
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int64_t ncclParamGdrCopyFlushEnable();
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struct collNetRecvConnectInfo {
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int rank;
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int nranks;
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collNetHandle_t collNetHandle;
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};
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struct collNetSendConnectInfo {
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void* mhandles[NCCL_NUM_PROTOCOLS];
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void* reqFifo;
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};
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#define COLLNET_GROUP_NSUBS 8
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#define COLLNET_MAX_GROUPS (NCCL_PROXY_MAX_SUBS/COLLNET_GROUP_NSUBS)
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#define NCCL_NET_MAP_HOSTMEM 0
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#define NCCL_NET_MAP_DEVMEM 1
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#define NCCL_NET_MAP_SHARED_HOSTMEM 2
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#define NCCL_NET_MAP_SHARED_DEVMEM 3
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#define NCCL_NET_MAP_GDCMEM 4
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#define NCCL_NET_MAP_MEMS 5
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#define NCCL_NET_MAP_MASK_DEVMEM 0x40000000
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#define NCCL_NET_MAP_MASK_SHARED 0x80000000
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#define NCCL_NET_MAP_MASK_USED 0x20000000
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#define NCCL_NET_MAP_MASK_OFFSET 0x1fffffff
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#define NCCL_NET_MAP_OFFSET_BANK(mapStruct, offsetName) \
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((mapStruct)->offsets.offsetName >> 30)
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#define NCCL_NET_MAP_OFFSET_NULL(mapStruct, offsetName) \
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(((mapStruct)->offsets.offsetName >> 29) == 0)
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#define NCCL_NET_MAP_GET_POINTER(mapStruct, cpuOrGpu, offsetName) \
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(NCCL_NET_MAP_OFFSET_NULL(mapStruct, offsetName) ? NULL : \
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(mapStruct)->mems[NCCL_NET_MAP_OFFSET_BANK(mapStruct, offsetName)].cpuOrGpu##Ptr + ((mapStruct)->offsets.offsetName & NCCL_NET_MAP_MASK_OFFSET))
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#define NCCL_NET_MAP_DEV_MEM(mapStruct, offsetName) \
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(((mapStruct)->offsets.offsetName & NCCL_NET_MAP_MASK_DEVMEM) != 0)
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#define NCCL_NET_MAP_ADD_POINTER(mapStruct, shared, dev, memSize, offsetName) do { \
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int bank = NCCL_NET_MAP_MASK_USED + (dev)*NCCL_NET_MAP_MASK_DEVMEM + (shared)*NCCL_NET_MAP_MASK_SHARED; \
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if ((shared) == 0) { \
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if (dev) { \
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(mapStruct)->offsets.offsetName = bank + (mapStruct)->mems[NCCL_NET_MAP_DEVMEM].size; \
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(mapStruct)->mems[NCCL_NET_MAP_DEVMEM].size += memSize; \
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} else { \
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(mapStruct)->offsets.offsetName = bank + (mapStruct)->mems[NCCL_NET_MAP_HOSTMEM].size; \
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(mapStruct)->mems[NCCL_NET_MAP_HOSTMEM].size += memSize; \
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} \
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} else { \
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(mapStruct)->offsets.offsetName = bank; \
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} \
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} while (0);
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struct connectMapMem{
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char* gpuPtr;
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char* cpuPtr;
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int size;
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};
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struct connectMap {
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int shared;
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// First 3 bits of offsets determine the mem bank. 001 is host mem, 011 is dev mem, 101 is shared host mem and 111 is shared dev mem.
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struct connectMapMem mems[NCCL_NET_MAP_MEMS];
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// Offsets. 3 MSBs indicate mem bank, 111 indicates NULL.
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struct {
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uint32_t sendMem;
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uint32_t recvMem;
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uint32_t buffs[NCCL_NUM_PROTOCOLS];
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} offsets;
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};
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struct reqSlot {
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volatile void* recvBuff;
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volatile int size;
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};
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struct sendResources {
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struct connectMap map;
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void* collNetComm;
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struct ncclSendMem* sendMem;
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struct ncclRecvMem* recvMem;
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int rank;
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int nranks;
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int netDev;
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int useGdr;
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int useDmaBuf;
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uint64_t* gdcSync;
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void* gdrDesc;
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void* sendMhandles[NCCL_NUM_PROTOCOLS];
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void* recvMhandles[NCCL_NUM_PROTOCOLS];
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uint64_t step;
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struct reqSlot (*reqFifo)[NCCL_STEPS];
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int collNetRank;
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};
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struct recvResources {
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struct connectMap map;
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void* collNetComm;
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struct ncclSendMem* sendMem;
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struct ncclRecvMem* recvMem;
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int rank;
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int nranks;
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int netDev;
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int useGdr;
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int useDmaBuf;
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int needFlush;
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uint64_t* gdcSync;
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uint64_t* gdcFlush;
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void* gdrDesc;
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void* mhandles[NCCL_NUM_PROTOCOLS];
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uint64_t step;
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struct reqSlot reqFifo[COLLNET_MAX_GROUPS][NCCL_STEPS];
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int collNetRank;
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};
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static ncclResult_t canConnect(int* ret, struct ncclTopoSystem* topo, struct ncclTopoGraph* graph, struct ncclPeerInfo* info1, struct ncclPeerInfo* info2) {
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// This transport cannot be used for p2p
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*ret = 0;
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return ncclSuccess;
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}
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struct setupReq {
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int netDev;
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int useGdr;
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int needFlush;
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};
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/* Setup send connector, and return connect information for others in the coll
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* communicator to connect to me */
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static ncclResult_t sendSetup(struct ncclComm* comm, struct ncclTopoGraph* graph, struct ncclPeerInfo* myInfo, struct ncclPeerInfo* peerInfo, struct ncclConnect* connectInfo, struct ncclConnector* send, int channelId, int connIndex) {
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struct setupReq req;
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int proxyRank;
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NCCLCHECK(ncclTopoGetNetDev(comm, myInfo->rank, graph, channelId, -1, &req.netDev, &proxyRank));
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NCCLCHECK(ncclTopoCheckGdr(comm->topo, myInfo->busId, req.netDev, 1, &req.useGdr));
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send->conn.flags |= req.useGdr ? NCCL_DIRECT_NIC : 0;
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// Determine whether we need to flush the GDR buffer on recv or not
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if (req.useGdr) NCCLCHECK(ncclTopoNeedFlush(comm->topo, myInfo->busId, &req.needFlush));
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NCCLCHECK(ncclTopoGetLocalRank(comm->topo, myInfo->rank, &send->proxyConn.localRank));
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NCCLCHECK(ncclProxyConnect(comm, TRANSPORT_COLLNET, 1, myInfo->rank, &send->proxyConn));
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NCCLCHECK(ncclProxyCallBlocking(&send->proxyConn, ncclProxyMsgSetup, &req, sizeof(req), NULL, 0));
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INFO(NCCL_INIT|NCCL_NET,"CollNet %02d/%1d : %d [send] via COLLNET/%s/%d%s", channelId, connIndex, myInfo->rank, collNetName(comm), req.netDev,
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req.useGdr ? "/GDRDMA" : "");
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return ncclSuccess;
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}
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static ncclResult_t recvSetup(struct ncclComm* comm, struct ncclTopoGraph* graph, struct ncclPeerInfo* myInfo, struct ncclPeerInfo* peerInfo, struct ncclConnect* connectInfo, struct ncclConnector* recv, int channelId, int connIndex) {
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struct setupReq req;
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int proxyRank;
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NCCLCHECK(ncclTopoGetNetDev(comm, myInfo->rank, graph, channelId, -1, &req.netDev, &proxyRank));
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NCCLCHECK(ncclTopoCheckGdr(comm->topo, myInfo->busId, req.netDev, 0, &req.useGdr));
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recv->conn.flags |= req.useGdr ? NCCL_DIRECT_NIC : 0;
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NCCLCHECK(ncclTopoGetLocalRank(comm->topo, myInfo->rank, &recv->proxyConn.localRank));
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NCCLCHECK(ncclProxyConnect(comm, TRANSPORT_COLLNET, 0, myInfo->rank, &recv->proxyConn));
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struct collNetRecvConnectInfo* info = (struct collNetRecvConnectInfo*) connectInfo;
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NCCLCHECK(ncclProxyCallBlocking(&recv->proxyConn, ncclProxyMsgSetup, &req, sizeof(req), &info->collNetHandle, sizeof(collNetHandle_t)));
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INFO(NCCL_INIT|NCCL_NET,"CollNet %02d/%1d : %d [receive] via COLLNET/%s/%d%s", channelId, connIndex, myInfo->rank, collNetName(comm), req.netDev,
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req.useGdr ? "/GDRDMA" : "");
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return ncclSuccess;
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}
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static ncclResult_t collNetDumpMap(struct connectMap* map) {
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printf("Dump map\n");
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struct connectMapMem *mem = map->mems+NCCL_NET_MAP_HOSTMEM;
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printf("Mem 0: Host mem (%x B) CPU %p GPU %p\n", mem->size, mem->cpuPtr, mem->gpuPtr);
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mem = map->mems+NCCL_NET_MAP_DEVMEM;
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printf("Mem 1: Vid mem CPU (%x B) %p GPU %p\n", mem->size, mem->cpuPtr, mem->gpuPtr);
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mem = map->mems+NCCL_NET_MAP_SHARED_HOSTMEM;
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printf("Mem 2: Shared Host mem (%x B) CPU %p GPU %p\n", mem->size, mem->cpuPtr, mem->gpuPtr);
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mem = map->mems+NCCL_NET_MAP_SHARED_DEVMEM;
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printf("Mem 3: Shared Vid (%x B) mem CPU %p GPU %p\n", mem->size, mem->cpuPtr, mem->gpuPtr);
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printf("SendMem -> Used %d Bank %d Offset %x, cpu %p gpu %p\n",
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map->offsets.sendMem & NCCL_NET_MAP_MASK_USED ? 1 : 0,
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NCCL_NET_MAP_OFFSET_BANK(map, sendMem), map->offsets.sendMem & NCCL_NET_MAP_MASK_OFFSET,
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NCCL_NET_MAP_GET_POINTER(map, cpu, sendMem), NCCL_NET_MAP_GET_POINTER(map, gpu, sendMem));
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printf("RecvMem -> Used %d Bank %d Offset %x, cpu %p gpu %p\n",
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map->offsets.recvMem & NCCL_NET_MAP_MASK_USED ? 1 : 0,
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NCCL_NET_MAP_OFFSET_BANK(map, recvMem), map->offsets.recvMem & NCCL_NET_MAP_MASK_OFFSET,
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NCCL_NET_MAP_GET_POINTER(map, cpu, recvMem), NCCL_NET_MAP_GET_POINTER(map, gpu, recvMem));
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for (int p=0; p<NCCL_NUM_PROTOCOLS; p++) {
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printf("Proto %d -> Used %d Bank %d Offset %x, cpu %p, gpu %p\n", p,
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map->offsets.buffs[p] & NCCL_NET_MAP_MASK_USED ? 1 : 0,
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NCCL_NET_MAP_OFFSET_BANK(map, buffs[p]), map->offsets.buffs[p] & NCCL_NET_MAP_MASK_OFFSET,
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NCCL_NET_MAP_GET_POINTER(map, cpu, buffs[p]), NCCL_NET_MAP_GET_POINTER(map, gpu, buffs[p]));
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}
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printf("End of dump\n");
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return ncclSuccess;
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}
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struct collNetConnectArgs {
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int rank;
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int nranks;
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struct ncclConnect* connectInfos;
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};
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static ncclResult_t sendConnect(struct ncclComm* comm, struct ncclConnect* connectInfos, int nranks, int rank, struct ncclConnector* send) {
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// We're on the same process as the proxy. We can pass a pointer to a struct.
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struct collNetConnectArgs args = { rank, nranks, connectInfos };
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struct connectMap* map;
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NCCLCHECK(ncclProxyCallBlocking(&send->proxyConn, ncclProxyMsgConnect, &args, sizeof(struct collNetConnectArgs), &map, sizeof(struct connectMap*)));
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// If collnet connect failed, propagate error to fallback on regular p2p
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if (map == NULL) return ncclSystemError;
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//NCCLCHECK(collNetDumpMap(map));
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struct ncclSendMem *sendMem = (struct ncclSendMem*) NCCL_NET_MAP_GET_POINTER(map, gpu, sendMem);
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void* gdcMem = map->mems[NCCL_NET_MAP_GDCMEM].gpuPtr;
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send->conn.head = gdcMem ? (uint64_t*)gdcMem : &sendMem->head;
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struct ncclRecvMem *recvMem = (struct ncclRecvMem*) NCCL_NET_MAP_GET_POINTER(map, gpu, recvMem);
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send->conn.tail = &recvMem->tail;
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send->conn.sizesFifo = recvMem->sizesFifo;
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for (int i=0; i<NCCL_STEPS; i++) send->conn.sizesFifo[i] = -1;
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send->conn.offsFifo = recvMem->offsFifo;
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for (int p=0; p<NCCL_NUM_PROTOCOLS; p++)
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send->conn.buffs[p] = NCCL_NET_MAP_GET_POINTER(map, gpu, buffs[p]);
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return ncclSuccess;
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}
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static ncclResult_t recvConnect(struct ncclComm* comm, struct ncclConnect* connectInfos, int nranks, int rank, struct ncclConnector* recv) {
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// We're on the same process as the proxy. We can pass a pointer to a struct.
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struct collNetConnectArgs args = { rank, nranks, connectInfos };
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struct connectMap* map;
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NCCLCHECK(ncclProxyCallBlocking(&recv->proxyConn, ncclProxyMsgConnect, &args, sizeof(struct collNetConnectArgs), &map, sizeof(struct connectMap*)));
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// If collnet connect failed, propagate error to fallback on regular p2p
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if (map == NULL) return ncclSystemError;
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//NCCLCHECK(collNetDumpMap(map));
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struct ncclSendMem *sendMem = (struct ncclSendMem*) NCCL_NET_MAP_GET_POINTER(map, gpu, sendMem);
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recv->conn.head = &sendMem->head;
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struct ncclRecvMem *recvMem = (struct ncclRecvMem*) NCCL_NET_MAP_GET_POINTER(map, gpu, recvMem);
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void* gdcMem = map->mems[NCCL_NET_MAP_GDCMEM].gpuPtr;
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recv->conn.tail = gdcMem ? (uint64_t*)gdcMem : &recvMem->tail;
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recv->conn.offsFifo = recvMem->offsFifo;
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for (int p=0; p<NCCL_NUM_PROTOCOLS; p++) {
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recv->conn.buffs[p] = NCCL_NET_MAP_GET_POINTER(map, gpu, buffs[p]);
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}
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return ncclSuccess;
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}
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static ncclResult_t sendFree(struct ncclConnector* send) {
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return ncclSuccess;
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}
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static ncclResult_t recvFree(struct ncclConnector* recv) {
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return ncclSuccess;
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}
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static ncclResult_t sendProxySetup(struct ncclProxyConnection* connection, struct ncclComm* comm, void* reqBuff, int reqSize, void* respBuff, int respSize, int* done) {
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struct setupReq* req = (struct setupReq*)reqBuff;
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if (reqSize != sizeof(struct setupReq)) return ncclInternalError;
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struct sendResources* resources;
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NCCLCHECK(ncclCalloc(&resources, 1));
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connection->transportResources = resources;
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connection->shared = 1;
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resources->netDev = req->netDev;
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resources->useGdr = req->useGdr;
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ncclNetProperties_t props;
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NCCLCHECK(collNetGetProperties(comm, req->netDev, &props));
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/* DMA-BUF support */
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resources->useDmaBuf = resources->useGdr && comm->dmaBufSupport && (props.ptrSupport & NCCL_PTR_DMABUF);
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return ncclSuccess;
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}
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struct sharedResources {
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void* collNetListenComms[MAXCHANNELS];
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void* collNetComms[MAXCHANNELS];
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int commRefCount[NCCL_MAX_NETDEVS];
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};
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ncclResult_t sharedListen(struct ncclComm* comm, int netDev, void* collNetHandle) {
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struct sharedResources* resources = (struct sharedResources*)comm->proxyState.progressState.collNet.resources;
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if (resources == NULL) {
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NCCLCHECK(ncclCalloc(&resources, 1));
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comm->proxyState.progressState.collNet.resources = resources;
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}
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if (resources->collNetComms[netDev] == NULL)
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NCCLCHECK(collNetListen(comm, netDev, collNetHandle, resources->collNetListenComms+netDev));
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return ncclSuccess;
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}
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static ncclResult_t sharedConnect(struct ncclComm* comm, int netDev, struct ncclConnect* connectInfos, int nranks, int rank, void** collNetComm) {
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struct sharedResources* resources = (struct sharedResources*)comm->proxyState.progressState.collNet.resources;
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if (resources->collNetComms[netDev] == NULL) {
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// Connect to coll comm
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collNetHandle_t** handlePtrs = NULL;
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NCCLCHECK(ncclCalloc(&handlePtrs, nranks));
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for (int i = 0; i < nranks; i++) {
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struct collNetRecvConnectInfo* info = (struct collNetRecvConnectInfo*)(connectInfos+i);
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handlePtrs[i] = &(info->collNetHandle);
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}
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ncclResult_t ret = collNetConnect(comm, (void**)handlePtrs, nranks, rank,
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resources->collNetListenComms[netDev],
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resources->collNetComms+netDev);
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free(handlePtrs);
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if (ret == ncclSuccess) {
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// Close listen comm
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NCCLCHECK(collNetCloseListen(comm, resources->collNetListenComms[netDev]));
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} else {
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resources->collNetListenComms[netDev] = NULL;
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}
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}
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*collNetComm = resources->collNetComms[netDev];
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if (*collNetComm) resources->commRefCount[netDev]++;
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return ncclSuccess;
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}
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static ncclResult_t sharedFree(struct ncclComm* comm, int netDev) {
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struct sharedResources* resources = (struct sharedResources*)comm->proxyState.progressState.collNet.resources;
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resources->commRefCount[netDev]--;
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if (resources->commRefCount[netDev] == 0) {
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NCCLCHECK(collNetCloseColl(comm, resources->collNetComms[netDev]));
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}
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for (int n=0; n<NCCL_MAX_NETDEVS; n++) if (resources->commRefCount[n]) return ncclSuccess;
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comm->proxyState.progressState.collNet.resources = NULL;
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free(resources);
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return ncclSuccess;
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}
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static ncclResult_t sharedBuffersInit(struct ncclComm* comm, int cuda, char** gpuPtr, char** cpuPtr, int* size) {
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struct ncclProxySharedCollNet* state = &comm->proxyState.progressState.collNet;
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if (state->size == 0) {
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state->size = 2*comm->nChannels*comm->buffSizes[NCCL_PROTO_SIMPLE];
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}
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*size = state->size;
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if (cuda && state->cudaBuff == NULL) {
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NCCLCHECK(ncclCudaCalloc(&state->cudaBuff, *size));
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}
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if (!cuda && state->hostBuff == NULL) {
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NCCLCHECK(ncclCudaHostCalloc(&state->hostBuff, *size));
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}
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*gpuPtr = *cpuPtr = cuda ? state->cudaBuff : state->hostBuff;
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return ncclSuccess;
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}
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static ncclResult_t sharedBuffersGet(struct ncclComm* comm, int type, int slot, int channel, int* offset) {
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// Use different pools for different channels and also separate send/recv.
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int slotSize = comm->buffSizes[NCCL_PROTO_SIMPLE]/NCCL_STEPS;
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int globalSlot = (type*NCCL_STEPS+slot)*comm->nChannels+channel;
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*offset = slotSize * globalSlot;
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return ncclSuccess;
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}
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static ncclResult_t sharedBuffersDestroy(struct ncclComm* comm) {
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struct ncclProxySharedCollNet* state = &comm->proxyState.progressState.collNet;
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if (state->size == 0) return ncclSuccess;
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CUDACHECK(cudaFree(state->cudaBuff));
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NCCLCHECK(ncclCudaHostFree(state->hostBuff));
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// This will be called multiple times, with multiple channels and send/recv. Make sure we only do it once.
|
|
state->size = 0;
|
|
return ncclSuccess;
|
|
}
|
|
|
|
static ncclResult_t recvProxySetup(struct ncclProxyConnection* connection, struct ncclComm* comm, void* reqBuff, int reqSize, void* respBuff, int respSize, int* done) {
|
|
struct setupReq* req = (struct setupReq*)reqBuff;
|
|
if (reqSize != sizeof (struct setupReq)) return ncclInternalError;
|
|
|
|
struct recvResources* resources;
|
|
NCCLCHECK(ncclCalloc(&resources, 1));
|
|
connection->transportResources = resources;
|
|
connection->shared = 1;
|
|
|
|
resources->netDev = req->netDev;
|
|
resources->useGdr = req->useGdr;
|
|
resources->needFlush = req->needFlush;
|
|
ncclNetProperties_t props;
|
|
NCCLCHECK(collNetGetProperties(comm, req->netDev, &props));
|
|
/* DMA-BUF support */
|
|
resources->useDmaBuf = resources->useGdr && comm->dmaBufSupport && (props.ptrSupport & NCCL_PTR_DMABUF);
|
|
|
|
collNetHandle_t* netHandle = (collNetHandle_t*) respBuff;
|
|
if (respSize != sizeof(collNetHandle_t)) return ncclInternalError;
|
|
|
|
NCCLCHECK(sharedListen(comm, req->netDev, netHandle));
|
|
return ncclSuccess;
|
|
}
|
|
|
|
static ncclResult_t sendProxyConnect(struct ncclProxyConnection* connection, struct ncclComm* comm, void* reqBuff, int reqSize, void* respBuff, int respSize, int* done) {
|
|
if (reqSize != sizeof(struct collNetConnectArgs)) { WARN("sendProxyConnect: reqSize is %d != %ld", reqSize, sizeof(struct collNetConnectArgs)); return ncclInternalError; }
|
|
struct collNetConnectArgs* args = (struct collNetConnectArgs*)reqBuff;
|
|
struct collNetSendConnectInfo* info = (struct collNetSendConnectInfo*)(args->connectInfos+args->rank);
|
|
|
|
struct sendResources* resources = (struct sendResources*)(connection->transportResources);
|
|
|
|
// Get info from recv side
|
|
resources->collNetRank = args->rank;
|
|
resources->reqFifo = (struct reqSlot (*)[NCCL_STEPS])(info->reqFifo);
|
|
|
|
for (int p=0; p<NCCL_NUM_PROTOCOLS; p++)
|
|
resources->recvMhandles[p] = info->mhandles[p];
|
|
|
|
NCCLCHECK(sharedConnect(comm, resources->netDev, args->connectInfos, args->nranks, args->rank, &resources->collNetComm));
|
|
|
|
// Collnet connect is allowed to fail. Gracefully handle that case by returning NULL to the caller.
|
|
if (respSize != sizeof(struct connectMap*)) { WARN("sendProxyConnect: respSize is %d != %ld", respSize, sizeof(void*)); return ncclInternalError; }
|
|
if (resources->collNetComm == NULL) {
|
|
*((struct connectMap**)respBuff) = NULL;
|
|
return ncclSuccess;
|
|
}
|
|
connection->proxyAppendPtr = comm->proxyState.progressState.collNet.proxyAppend+2*resources->netDev;
|
|
|
|
struct connectMap* map = &resources->map;
|
|
|
|
NCCL_NET_MAP_ADD_POINTER(map, 0, 0, sizeof(struct ncclSendMem), sendMem);
|
|
NCCL_NET_MAP_ADD_POINTER(map, 0, 0, sizeof(struct ncclRecvMem), recvMem);
|
|
|
|
NCCLCHECK(ncclCudaHostCalloc(&map->mems[NCCL_NET_MAP_HOSTMEM].cpuPtr, map->mems[NCCL_NET_MAP_HOSTMEM].size));
|
|
map->mems[NCCL_NET_MAP_HOSTMEM].gpuPtr = map->mems[NCCL_NET_MAP_HOSTMEM].cpuPtr;
|
|
if (ncclGdrCopy && ncclParamGdrCopySyncEnable()) {
|
|
uint64_t *cpuPtr, *gpuPtr;
|
|
NCCLCHECK(ncclGdrCudaCalloc(&cpuPtr, &gpuPtr, 1, &resources->gdrDesc));
|
|
|
|
resources->gdcSync = cpuPtr;
|
|
struct connectMapMem* gdcMem = map->mems+NCCL_NET_MAP_GDCMEM;
|
|
gdcMem->cpuPtr = (char*)cpuPtr;
|
|
gdcMem->gpuPtr = (char*)gpuPtr;
|
|
gdcMem->size = sizeof(uint64_t); // sendMem->head
|
|
}
|
|
|
|
resources->sendMem = (struct ncclSendMem*) NCCL_NET_MAP_GET_POINTER(map, cpu, sendMem);
|
|
resources->recvMem = (struct ncclRecvMem*) NCCL_NET_MAP_GET_POINTER(map, cpu, recvMem);
|
|
// Don't give credits yet in shared mode.
|
|
resources->sendMem->head = -NCCL_STEPS;
|
|
|
|
// Allocate & Register shared buffers for the Simple protocol
|
|
int bank = resources->useGdr ? NCCL_NET_MAP_SHARED_DEVMEM : NCCL_NET_MAP_SHARED_HOSTMEM;
|
|
struct connectMapMem* mapMem = map->mems+bank;
|
|
NCCLCHECK(sharedBuffersInit(comm, resources->useGdr, &mapMem->gpuPtr, &mapMem->cpuPtr, &mapMem->size));
|
|
NCCL_NET_MAP_ADD_POINTER(map, 1, resources->useGdr, mapMem->size, buffs[NCCL_PROTO_SIMPLE]);
|
|
|
|
#if CUDA_VERSION >= 11070
|
|
/* DMA-BUF support */
|
|
if (resources->useGdr && resources->useDmaBuf) {
|
|
int dmabuf_fd;
|
|
CUCHECK(cuMemGetHandleForAddressRange((void *)&dmabuf_fd, (CUdeviceptr)mapMem->cpuPtr, mapMem->size, CU_MEM_RANGE_HANDLE_TYPE_DMA_BUF_FD, 0));
|
|
NCCLCHECK(collNetRegMrDmaBuf(comm, resources->collNetComm, mapMem->cpuPtr, mapMem->size,
|
|
NCCL_PTR_CUDA, 0ULL, dmabuf_fd,
|
|
&resources->sendMhandles[NCCL_PROTO_SIMPLE]));
|
|
(void)close(dmabuf_fd);
|
|
} else // FALL-THROUGH to nv_peermem GDR path
|
|
#endif
|
|
{
|
|
NCCLCHECK(collNetRegMr(comm, resources->collNetComm, mapMem->cpuPtr, mapMem->size,
|
|
resources->useGdr ? NCCL_PTR_CUDA : NCCL_PTR_HOST,
|
|
&resources->sendMhandles[NCCL_PROTO_SIMPLE]));
|
|
}
|
|
|
|
*((struct connectMap**)respBuff) = &resources->map;
|
|
return ncclSuccess;
|
|
}
|
|
|
|
static ncclResult_t recvProxyConnect(struct ncclProxyConnection* connection, struct ncclComm* comm, void* reqBuff, int reqSize, void* respBuff, int respSize, int* done) {
|
|
if (reqSize != sizeof(struct collNetConnectArgs)) { WARN("recvProxyConnect: reqSize is %d != %ld", reqSize, sizeof(struct collNetConnectArgs)); return ncclInternalError; }
|
|
struct collNetConnectArgs* args = (struct collNetConnectArgs*)reqBuff;
|
|
|
|
struct recvResources* resources = (struct recvResources*)(connection->transportResources);
|
|
struct collNetSendConnectInfo* info = (struct collNetSendConnectInfo*)(args->connectInfos+args->rank);
|
|
resources->collNetRank = args->rank;
|
|
|
|
NCCLCHECK(sharedConnect(comm, resources->netDev, args->connectInfos, args->nranks, args->rank, &resources->collNetComm));
|
|
|
|
// Collnet connect is allowed to fail. Gracefully handle that case by returning NULL to the caller.
|
|
if (respSize != sizeof(struct connectMap*)) { WARN("sendProxyConnect: respSize is %d != %ld", respSize, sizeof(void*)); return ncclInternalError; }
|
|
if (resources->collNetComm == NULL) {
|
|
*((struct connectMap**)respBuff) = NULL;
|
|
return ncclSuccess;
|
|
}
|
|
connection->proxyAppendPtr = comm->proxyState.progressState.collNet.proxyAppend+2*resources->netDev+1;
|
|
|
|
struct connectMap* map = &resources->map;
|
|
|
|
NCCL_NET_MAP_ADD_POINTER(map, 0, 0, sizeof(struct ncclSendMem), sendMem);
|
|
NCCL_NET_MAP_ADD_POINTER(map, 0, 0, sizeof(struct ncclRecvMem), recvMem);
|
|
|
|
NCCLCHECK(ncclCudaHostCalloc(&map->mems[NCCL_NET_MAP_HOSTMEM].cpuPtr, map->mems[NCCL_NET_MAP_HOSTMEM].size));
|
|
map->mems[NCCL_NET_MAP_HOSTMEM].gpuPtr = map->mems[NCCL_NET_MAP_HOSTMEM].cpuPtr;
|
|
if (ncclGdrCopy) {
|
|
uint64_t *cpuPtr, *gpuPtr;
|
|
NCCLCHECK(ncclGdrCudaCalloc(&cpuPtr, &gpuPtr, 2, &resources->gdrDesc));
|
|
|
|
if (ncclParamGdrCopySyncEnable()) {
|
|
resources->gdcSync = cpuPtr;
|
|
struct connectMapMem* gdcMem = map->mems+NCCL_NET_MAP_GDCMEM;
|
|
gdcMem->cpuPtr = (char*)cpuPtr;
|
|
gdcMem->gpuPtr = (char*)gpuPtr;
|
|
gdcMem->size = sizeof(uint64_t);
|
|
}
|
|
if (ncclParamGdrCopyFlushEnable()) resources->gdcFlush = cpuPtr + 1;
|
|
}
|
|
|
|
resources->sendMem = (struct ncclSendMem*) NCCL_NET_MAP_GET_POINTER(map, cpu, sendMem);
|
|
resources->recvMem = (struct ncclRecvMem*) NCCL_NET_MAP_GET_POINTER(map, cpu, recvMem);
|
|
|
|
// Allocate & Register shared buffers for the Simple protocol
|
|
int bank = resources->useGdr ? NCCL_NET_MAP_SHARED_DEVMEM : NCCL_NET_MAP_SHARED_HOSTMEM;
|
|
struct connectMapMem* mapMem = map->mems+bank;
|
|
NCCLCHECK(sharedBuffersInit(comm, resources->useGdr, &mapMem->gpuPtr, &mapMem->cpuPtr, &mapMem->size));
|
|
NCCL_NET_MAP_ADD_POINTER(map, 1, resources->useGdr, mapMem->size, buffs[NCCL_PROTO_SIMPLE]);
|
|
|
|
#if CUDA_VERSION >= 11070
|
|
/* DMA-BUF support */
|
|
if (resources->useGdr && resources->useDmaBuf) {
|
|
int dmabuf_fd;
|
|
CUCHECK(cuMemGetHandleForAddressRange((void *)&dmabuf_fd, (CUdeviceptr)mapMem->cpuPtr, mapMem->size, CU_MEM_RANGE_HANDLE_TYPE_DMA_BUF_FD, 0));
|
|
NCCLCHECK(collNetRegMrDmaBuf(comm, resources->collNetComm, mapMem->cpuPtr, mapMem->size,
|
|
NCCL_PTR_CUDA, 0ULL, dmabuf_fd,
|
|
&resources->mhandles[NCCL_PROTO_SIMPLE]));
|
|
(void)close(dmabuf_fd);
|
|
} else // FALL-THROUGH to nv_peermem GDR path
|
|
#endif
|
|
{
|
|
NCCLCHECK(collNetRegMr(comm, resources->collNetComm, mapMem->cpuPtr, mapMem->size,
|
|
resources->useGdr ? NCCL_PTR_CUDA : NCCL_PTR_HOST,
|
|
&resources->mhandles[NCCL_PROTO_SIMPLE]));
|
|
}
|
|
|
|
// Pass info to send side
|
|
info->reqFifo = resources->reqFifo;
|
|
for (int p=0; p<NCCL_NUM_PROTOCOLS; p++)
|
|
info->mhandles[p] = resources->mhandles[p];
|
|
|
|
if (respSize != sizeof(struct connectMap*)) { WARN("recvProxyConnect: respSize is %d != %ld", respSize, sizeof(void*)); return ncclInternalError; }
|
|
*((struct connectMap**)respBuff) = &resources->map;
|
|
return ncclSuccess;
|
|
}
|
|
|
|
static ncclResult_t sendProxyFree(struct ncclProxyConnection* connection, struct ncclComm* comm) {
|
|
struct sendResources* resources = (struct sendResources*)(connection->transportResources);
|
|
|
|
if (resources) {
|
|
for (int p = 0; p < NCCL_NUM_PROTOCOLS; p++) {
|
|
if (resources->sendMhandles[p]) {
|
|
NCCLCHECK(collNetDeregMr(comm, resources->collNetComm, resources->sendMhandles[p]));
|
|
}
|
|
}
|
|
struct connectMapMem* mems = resources->map.mems;
|
|
NCCLCHECK(ncclCudaHostFree(mems[NCCL_NET_MAP_HOSTMEM].cpuPtr));
|
|
CUDACHECK(cudaFree(mems[NCCL_NET_MAP_DEVMEM].cpuPtr));
|
|
if (mems[NCCL_NET_MAP_GDCMEM].cpuPtr) NCCLCHECK(ncclGdrCudaFree(resources->gdrDesc));
|
|
NCCLCHECK(sharedBuffersDestroy(comm));
|
|
NCCLCHECK(sharedFree(comm, resources->netDev));
|
|
free(connection->transportResources);
|
|
}
|
|
return ncclSuccess;
|
|
}
|
|
|
|
static ncclResult_t recvProxyFree(struct ncclProxyConnection* connection, struct ncclComm* comm) {
|
|
struct recvResources* resources = (struct recvResources*)(connection->transportResources);
|
|
|
|
if (resources) {
|
|
for (int p=0; p<NCCL_NUM_PROTOCOLS; p++) {
|
|
if (resources->mhandles[p]) {
|
|
NCCLCHECK(collNetDeregMr(comm, resources->collNetComm, resources->mhandles[p]));
|
|
}
|
|
}
|
|
struct connectMapMem* mems = resources->map.mems;
|
|
NCCLCHECK(ncclCudaHostFree(mems[NCCL_NET_MAP_HOSTMEM].cpuPtr));
|
|
CUDACHECK(cudaFree(mems[NCCL_NET_MAP_DEVMEM].cpuPtr));
|
|
if (mems[NCCL_NET_MAP_GDCMEM].cpuPtr) NCCLCHECK(ncclGdrCudaFree(resources->gdrDesc));
|
|
NCCLCHECK(sharedBuffersDestroy(comm));
|
|
NCCLCHECK(sharedFree(comm, resources->netDev));
|
|
free(connection->transportResources);
|
|
}
|
|
return ncclSuccess;
|
|
}
|
|
|
|
|
|
#define LAST_OF_GROUP(s) \
|
|
(s % COLLNET_GROUP_NSUBS == COLLNET_GROUP_NSUBS-1 || s == args->nsubs-1)
|
|
|
|
static ncclResult_t sendProxyProgress(struct ncclComm* comm, struct ncclProxyArgs* args) {
|
|
if (args->state == ncclProxyOpReady) {
|
|
for (int s=0; s<args->nsubs; s++) {
|
|
struct ncclProxySubArgs* sub = args->subs+s;
|
|
struct sendResources* resources = (struct sendResources*) (sub->connection->transportResources);
|
|
// Round to next multiple of sliceSteps
|
|
sub->base = ROUNDUP(resources->step, args->chunkSteps);
|
|
sub->posted = sub->received = sub->transmitted = sub->done = 0;
|
|
resources->step = sub->base + sub->nsteps;
|
|
}
|
|
args->state = ncclProxyOpProgress;
|
|
}
|
|
args->idle = 1;
|
|
if (args->state == ncclProxyOpProgress) {
|
|
int p = NCCL_PROTO_SIMPLE;
|
|
int nGroups = DIVUP(args->nsubs, COLLNET_GROUP_NSUBS);
|
|
int perGroupSteps = NCCL_STEPS / nGroups;
|
|
for (int s=0; s<args->nsubs; s++) {
|
|
struct ncclProxySubArgs* sub = args->subs+s;
|
|
struct sendResources* resources = (struct sendResources*) (sub->connection->transportResources);
|
|
void* sendMhandle = resources->sendMhandles[p];
|
|
void* recvMhandle = resources->recvMhandles[p];
|
|
auto reqFifo = resources->reqFifo;
|
|
if (sub->posted < sub->nsteps && sub->posted < sub->done + NCCL_STEPS) {
|
|
int buffSlot = (sub->base+sub->posted)%NCCL_STEPS;
|
|
int sharedBuffSlot = sub->posted%NCCL_STEPS;
|
|
int offset;
|
|
NCCLCHECK(sharedBuffersGet(comm, 0, sharedBuffSlot, 0, &offset));
|
|
resources->recvMem->offsFifo[buffSlot] = offset + s*args->chunkSize;
|
|
__sync_synchronize();
|
|
volatile uint64_t* sendHead = resources->gdcSync ? resources->gdcSync : &resources->sendMem->head;
|
|
sub->posted += args->sliceSteps;
|
|
*sendHead = sub->base + sub->posted - NCCL_STEPS;
|
|
if (resources->gdcSync) wc_store_fence(); // Flush out WC write
|
|
}
|
|
// Enforce sync between operations of the same group.
|
|
bool groupSync = (((s == 0) && ((sub+args->nsubs-1)->received == sub->received)) || (s && (sub-1)->received > sub->received));
|
|
if (groupSync && sub->received < sub->posted && sub->received < sub->done + perGroupSteps) {
|
|
int buffSlot = (sub->base+sub->received)%NCCL_STEPS;
|
|
int sharedBuffSlot = sub->received%NCCL_STEPS;
|
|
volatile int* sizesFifo = resources->recvMem->sizesFifo;
|
|
volatile uint64_t* recvTail = &resources->recvMem->tail;
|
|
char* localBuff = NCCL_NET_MAP_GET_POINTER(&resources->map, gpu, buffs[p]);
|
|
if (sizesFifo[buffSlot] != -1 && ((*recvTail > (sub->base+sub->received)))) {
|
|
// We have something to receive, let's check whether data is ready.
|
|
int ready = 1;
|
|
if (s == 0) {
|
|
int offset;
|
|
NCCLCHECK(sharedBuffersGet(comm, 0, sharedBuffSlot, 0, &offset));
|
|
args->sharedBuff[sharedBuffSlot] = localBuff + offset;
|
|
args->sharedSize[sharedBuffSlot] = args->chunkSize;
|
|
}
|
|
if (ready) {
|
|
sizesFifo[buffSlot] = -1;
|
|
sub->received += args->sliceSteps;
|
|
args->idle = 0;
|
|
//continue;
|
|
}
|
|
}
|
|
}
|
|
if (LAST_OF_GROUP(s) && (sub->transmitted < sub->received)) {
|
|
int group = s / COLLNET_GROUP_NSUBS;
|
|
int buffSlot = (sub->base+sub->transmitted)%NCCL_STEPS;
|
|
int sharedBuffSlot = sub->transmitted%NCCL_STEPS;
|
|
if (reqFifo[group][buffSlot].recvBuff != NULL) {
|
|
int totalSize = (s-group*COLLNET_GROUP_NSUBS+1) * args->sharedSize[sharedBuffSlot];
|
|
int count = totalSize / ncclTypeSize((ncclDataType_t)args->dtype);
|
|
reqFifo[group][buffSlot].size = args->sharedSize[sharedBuffSlot];
|
|
char* sendAddress = (char*)args->sharedBuff[sharedBuffSlot] + group*COLLNET_GROUP_NSUBS*args->sharedSize[sharedBuffSlot];
|
|
NCCLCHECK(collNetIallreduce(comm, resources->collNetComm, sendAddress, (void*)(reqFifo[group][buffSlot].recvBuff), count, (ncclDataType_t)args->dtype, (ncclRedOp_t)args->redOp, sendMhandle, recvMhandle, sub->requests+buffSlot));
|
|
if (sub->requests[buffSlot] == NULL) continue;
|
|
|
|
TRACE(NCCL_NET, "sendProxy [%d/%d/%d] Iallreduce posted, size %d req %p", sub->transmitted, group, buffSlot, totalSize, sub->requests[buffSlot]);
|
|
// Make sure size is reset to zero before we update the head.
|
|
__sync_synchronize();
|
|
sub->transmitted += args->sliceSteps;
|
|
args->idle = 0;
|
|
continue;
|
|
}
|
|
}
|
|
// Check whether the network has completed some send operations.
|
|
if (LAST_OF_GROUP(s) && sub->done < sub->transmitted) {
|
|
int done, size;
|
|
int group = s / COLLNET_GROUP_NSUBS;
|
|
int buffSlot = (sub->base+sub->done)%NCCL_STEPS;
|
|
NCCLCHECK(collNetTest(comm, (void*)(sub->requests[buffSlot]), &done, &size));
|
|
if (done) {
|
|
TRACE(NCCL_NET, "sendProxy [%d/%d/%d] request %p done, size %d", sub->done, group, buffSlot, sub->requests[buffSlot], size);
|
|
// Make sure size is updated before we set recvBuff to NULL (from the view of recv proxy, concerning the flush)
|
|
// (reordered store after store is possible on POWER, though not on x86)
|
|
__sync_synchronize();
|
|
reqFifo[group][buffSlot].recvBuff = NULL; // Notify recvProxy
|
|
for (int i=group*COLLNET_GROUP_NSUBS; i<=s; i++) args->subs[i].done += args->sliceSteps;
|
|
args->idle = 0;
|
|
int allDone = 1;
|
|
for (int i=0; i<args->nsubs; i++) {
|
|
if (args->subs[i].done < args->subs[i].nsteps) { allDone = 0; break; }
|
|
}
|
|
if (allDone) {
|
|
args->state = ncclProxyOpNone;
|
|
TRACE(NCCL_NET, "sendProxy [%d/%d] stopped", sub->done, s);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return ncclSuccess;
|
|
}
|
|
|
|
static ncclResult_t recvProxyProgress(struct ncclComm* comm, struct ncclProxyArgs* args) {
|
|
if (args->state == ncclProxyOpReady) {
|
|
for (int s=0; s<args->nsubs; s++) {
|
|
struct ncclProxySubArgs* sub = args->subs+s;
|
|
struct recvResources* resources = (struct recvResources*) (sub->connection->transportResources);
|
|
// Round to next multiple of sliceSteps
|
|
sub->base = ROUNDUP(resources->step, args->chunkSteps);
|
|
sub->posted = sub->received = sub->flushed = sub->transmitted = sub->done = 0;
|
|
resources->step = sub->base + sub->nsteps;
|
|
}
|
|
args->state = ncclProxyOpProgress;
|
|
}
|
|
args->idle = 1;
|
|
if (args->state == ncclProxyOpProgress) {
|
|
int p = NCCL_PROTO_SIMPLE;
|
|
int nGroups = DIVUP(args->nsubs, COLLNET_GROUP_NSUBS);
|
|
int perGroupSteps = NCCL_STEPS / nGroups;
|
|
for (int s=0; s<args->nsubs; s++) {
|
|
struct ncclProxySubArgs* sub = args->subs+s;
|
|
struct recvResources* resources = (struct recvResources*) (sub->connection->transportResources);
|
|
void* mhandle = resources->mhandles[p];
|
|
auto reqFifo = resources->reqFifo;
|
|
char* localBuff = NCCL_NET_MAP_GET_POINTER(&resources->map, cpu, buffs[p]);
|
|
|
|
// Enforce sync between operations of the same group.
|
|
if (LAST_OF_GROUP(s) && (sub->posted < sub->done + perGroupSteps) && (sub->posted < sub->nsteps)) {
|
|
int group = s / COLLNET_GROUP_NSUBS;
|
|
int buffSlot = (sub->base+sub->posted)%NCCL_STEPS;
|
|
int sharedBuffSlot = sub->posted%NCCL_STEPS;
|
|
int startChannel = group*COLLNET_GROUP_NSUBS;
|
|
int offset;
|
|
NCCLCHECK(sharedBuffersGet(comm, 1, sharedBuffSlot, startChannel, &offset));
|
|
reqFifo[group][buffSlot].recvBuff = localBuff + offset;
|
|
TRACE(NCCL_NET, "recvProxy [%d/%d/%d] posted buffer %p", sub->posted, group, buffSlot, reqFifo[group][buffSlot].recvBuff);
|
|
sub->posted += args->sliceSteps;
|
|
args->idle = 0;
|
|
continue;
|
|
}
|
|
if (LAST_OF_GROUP(s) && (sub->posted > sub->received)) {
|
|
int group = s / COLLNET_GROUP_NSUBS;
|
|
int buffSlot = (sub->base+sub->received)%NCCL_STEPS;
|
|
int sharedBuffSlot = sub->received%NCCL_STEPS;
|
|
if (reqFifo[group][buffSlot].recvBuff == NULL) { // Buffer is cleared : coll is complete
|
|
args->sharedSize[sharedBuffSlot] = reqFifo[group][buffSlot].size;
|
|
int totalSize = args->sharedSize[sharedBuffSlot]*(s-group*COLLNET_GROUP_NSUBS+1);
|
|
TRACE(NCCL_NET, "recvProxy [%d/%d/%d] received, size %d", sub->received, group, buffSlot, totalSize);
|
|
sub->received += args->sliceSteps;
|
|
sub->requests[buffSlot] = NULL;
|
|
if (reqFifo[group][buffSlot].size > 0 && resources->useGdr && resources->needFlush) {
|
|
// GDRCOPY support
|
|
if (resources->gdcFlush) {
|
|
#if defined (__x86_64__)
|
|
// Force a PCI-E read from GPU memory
|
|
asm volatile ("mov (%0), %%eax" :: "l"(resources->gdcFlush) : "%eax");
|
|
#else
|
|
WARN("NET: GDR Flush only supported on x86_64");
|
|
return ncclInternalError;
|
|
#endif
|
|
sub->requests[buffSlot] = NULL;
|
|
} else {
|
|
int startChannel = group*COLLNET_GROUP_NSUBS;
|
|
int offset;
|
|
NCCLCHECK(sharedBuffersGet(comm, 1, sharedBuffSlot, startChannel, &offset));
|
|
NCCLCHECK(collNetIflush(comm, resources->collNetComm, localBuff + offset, totalSize, mhandle, sub->requests+buffSlot));
|
|
}
|
|
} else {
|
|
for (int i=group*COLLNET_GROUP_NSUBS; i<=s; i++) args->subs[i].flushed += args->sliceSteps;
|
|
}
|
|
args->idle = 0;
|
|
continue;
|
|
}
|
|
}
|
|
if (LAST_OF_GROUP(s) && (sub->received > sub->flushed)) {
|
|
// Progress flush operations
|
|
int group = s / COLLNET_GROUP_NSUBS;
|
|
int buffSlot = (sub->base + sub->flushed)%NCCL_STEPS;
|
|
int done = 1;
|
|
if (sub->requests[buffSlot]) NCCLCHECK(collNetTest(comm, sub->requests[buffSlot], &done, NULL));
|
|
if (done) {
|
|
TRACE(NCCL_NET, "recvProxy [%d/%d/%d] flushed", sub->flushed, group, buffSlot);
|
|
for (int i=group*COLLNET_GROUP_NSUBS; i<=s; i++) args->subs[i].flushed += args->sliceSteps;
|
|
args->idle = 0;
|
|
//continue;
|
|
}
|
|
}
|
|
if (sub->flushed > sub->transmitted) {
|
|
int group = s / COLLNET_GROUP_NSUBS;
|
|
int buffSlot = (sub->base + sub->transmitted)%NCCL_STEPS;
|
|
int sharedBuffSlot = sub->transmitted%NCCL_STEPS;
|
|
int startChannel = group*COLLNET_GROUP_NSUBS;
|
|
int offset;
|
|
NCCLCHECK(sharedBuffersGet(comm, 1, sharedBuffSlot, startChannel, &offset));
|
|
volatile int* offsFifo = (volatile int*)resources->recvMem->offsFifo;
|
|
offsFifo[buffSlot] = offset + (s%COLLNET_GROUP_NSUBS)*args->chunkSize;
|
|
__sync_synchronize();
|
|
volatile uint64_t* recvTail = resources->gdcSync ? resources->gdcSync : &resources->recvMem->tail;
|
|
*recvTail = sub->base + sub->flushed;
|
|
if (resources->gdcSync) wc_store_fence(); // Flush out WC write
|
|
sub->transmitted += args->sliceSteps;
|
|
args->idle = 0;
|
|
continue;
|
|
}
|
|
// Enforce sync here to make sure the last sub doesn't increase "done" before all others in the group have
|
|
// reached the same point, otherwise we would start posting buffers to the send proxy before we're done
|
|
// processing all the shared buffer.
|
|
bool groupSync = (((s == 0) && ((sub+args->nsubs-1)->done == sub->done)) || (s && (sub-1)->done > sub->done));
|
|
volatile uint64_t* sendHead = &resources->sendMem->head;
|
|
if (groupSync && sub->done < sub->transmitted && (sub->base+sub->done) < *sendHead) {
|
|
sub->done += args->sliceSteps;
|
|
args->idle = 0;
|
|
if (sub->done == sub->nsteps && s == args->nsubs-1) {
|
|
args->state = ncclProxyOpNone;
|
|
TRACE(NCCL_NET, "recvProxy [%d/%d] stopped", sub->done, s);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return ncclSuccess;
|
|
}
|
|
|
|
struct ncclTransport collNetTransport = {
|
|
"COL",
|
|
canConnect,
|
|
{ sendSetup, sendConnect, sendFree, NULL, sendProxySetup, sendProxyConnect, sendProxyFree, sendProxyProgress },
|
|
{ recvSetup, recvConnect, recvFree, NULL, recvProxySetup, recvProxyConnect, recvProxyFree, recvProxyProgress }
|
|
};
|