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/*************************************************************************
* Copyright (c) 2016-2020, NVIDIA CORPORATION. All rights reserved.
*
* See LICENSE.txt for license information
************************************************************************/
#ifndef NCCL_PROXY_H_
#define NCCL_PROXY_H_
#include <pthread.h>
enum ncclProxyOpState { ncclProxyOpNone, ncclProxyOpReady, ncclProxyOpProgress };
struct ncclProxyArgs;
typedef ncclResult_t (*proxyProgressFunc_t)(struct ncclProxyArgs*);
struct ncclProxyArgs {
proxyProgressFunc_t progress;
struct ncclChannel* channel;
struct ncclConnector* connector;
size_t sendbytes;
size_t recvbytes;
int sliceSteps;
int chunkSteps;
int nsteps;
uint64_t opCount;
int protocol;
int segment; // Only for profiling
ncclDataType_t dtype;
ncclRedOp_t redOp;
int state; // add component before this line -- it is left out during initialization
// Internal state
uint64_t posted;
uint64_t received; // Only used by recv proxy to wait for flush.
uint64_t transmitted;
uint64_t done;
uint64_t end;
void* requests[NCCL_STEPS];
int idle;
// Element linking
pthread_mutex_t mutex;
struct ncclProxyArgs* next;
struct ncclProxyArgs* nextPeer;
struct ncclProxyArgs* nextGroup;
struct ncclProxyArgs** proxyAppendPtr;
};
struct ncclProxySharedBuffers {
int nslots;
int slotSize;
char* cudaBuff[2*MAXCHANNELS];
int* cudaUsed[2*MAXCHANNELS];
char* hostBuff[2*MAXCHANNELS];
int* hostUsed[2*MAXCHANNELS];
struct ncclProxyArgs* proxyAppend[2*MAXCHANNELS]; // Separate send and recv
};
struct ncclProxyPool;
struct ncclProxyState {
pthread_cond_t cond;
pthread_mutex_t opsMutex;
pthread_mutex_t poolMutex;
bool stop;
struct ncclProxySharedBuffers* sharedBuffs;
struct ncclProxyArgs* ops;
struct ncclProxyArgs* nextOps;
struct ncclProxyArgs* nextOpsEnd;
struct ncclProxyArgs* pool;
struct ncclProxyPool* pools;
};
typedef ncclResult_t (*threadFunc_t)(struct ncclProxyArgs*);
enum proxyMode {
proxyRing = 0,
proxyFrom = 1,
proxyTo = 2
};
ncclResult_t ncclProxySaveColl(struct ncclProxyArgs* args, int pattern, int root, int nranks);
ncclResult_t ncclProxySaveP2p(struct ncclInfo* info, struct ncclChannel* channel, int segment);
ncclResult_t ncclProxyStart(struct ncclComm* comm);
ncclResult_t ncclProxyCreate(struct ncclComm* comm);
ncclResult_t ncclProxyDestroy(struct ncclComm* comm);
ncclResult_t ncclProxySharedBuffersInit(struct ncclComm* comm, int cuda, int* size, char** ptr);
ncclResult_t ncclProxySharedBuffersAlloc(struct ncclComm* comm, int cuda, int type, int channel, int size, char** ptr);
ncclResult_t ncclProxySharedBuffersFree(struct ncclComm* comm, int cuda, int type, int channel, int size, char* ptr);
ncclResult_t ncclProxySharedBuffersDestroy(struct ncclComm* comm);
#include <unistd.h>
// Spin wait until func evaluates to true
template<typename FUNC>
inline void transportProxyWait(const FUNC& func) {
while (!func()) {
sched_yield();
}
}
#endif
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