yezhengmao/nccl
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Merge branch 'lowintelligence-shm'

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PR#196
This commit is contained in:
David Addison 2019-08-14 10:09:53 -07:00
commit ccb1298148
3 changed files with 12 additions and 10 deletions
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1
src/include/utils.h
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@ -11,6 +11,7 @@
#include <stdint.h>
ncclResult_t getHostName(char* hostname, int maxlen, const char delim);
uint64_t getHash(const char* string, int n);
uint64_t getHostHash();
uint64_t getPidHash();

13
src/init.cc
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@ -308,12 +308,12 @@ static void showVersion() {
}
}
static ncclResult_t fillInfo(struct ncclPeerInfo* info, int rank) {
static ncclResult_t fillInfo(struct ncclPeerInfo* info, int rank, uint64_t commHash) {
info->rank = rank;
CUDACHECK(cudaGetDevice(&info->cudaDev));
NCCLCHECK(getNvmlDevice(info->cudaDev, &info->nvmlDev))
info->hostHash=getHostHash();
info->pidHash=getPidHash();
info->hostHash=getHostHash()+commHash;
info->pidHash=getPidHash()+commHash;
// Get PCI Bus Id. We need to get the bus ID through CUDA first, since the
// cudaDev is a CUDA runtime dev number which could be different from the
@ -691,7 +691,8 @@ static ncclResult_t initTransportsRank(struct ncclComm* comm, ncclUniqueId* comm
int rank = comm->rank;
int nranks = comm->nRanks;
TRACE(NCCL_INIT, "rank %d nranks %d - BEGIN", rank, nranks);
uint64_t commHash = getHash(commId->internal, NCCL_UNIQUE_ID_BYTES);
TRACE(NCCL_INIT, "comm %p, commHash %lx, rank %d nranks %d - BEGIN", comm, commHash, rank, nranks);
NCCLCHECK(bootstrapInit(commId, rank, nranks, &comm->bootstrap));
// AllGather1 - begin
@ -702,7 +703,7 @@ static ncclResult_t initTransportsRank(struct ncclComm* comm, ncclUniqueId* comm
NCCLCHECK(ncclCalloc(&allGather1Data, nranks));
allGather1Data[rank].comm = comm;
NCCLCHECK(fillInfo(&allGather1Data[rank].peerInfo, rank));
NCCLCHECK(fillInfo(&allGather1Data[rank].peerInfo, rank, commHash));
NCCLCHECK(bootstrapAllGather(comm->bootstrap, allGather1Data, sizeof(*allGather1Data)));
NCCLCHECK(ncclCalloc(&comm->peerInfo, nranks));
@ -998,7 +999,7 @@ static ncclResult_t initTransportsAll(struct ncclComm** comms, const int* devs,
NCCLCHECK(ncclCalloc(&allInfo, nranks));
for (int rank=0; rank<nranks; rank++) {
CUDACHECK(cudaSetDevice(devs[rank]));
NCCLCHECK(fillInfo(allInfo+rank, rank));
NCCLCHECK(fillInfo(allInfo+rank, rank, 0));
}
int* connectTransport;

8
src/misc/utils.cc
View File

@ -87,10 +87,10 @@ void ncclDebugLog(ncclDebugLogLevel level, unsigned long flags, const char *file
}
}
uint64_t getHash(const char* string) {
uint64_t getHash(const char* string, int n) {
// Based on DJB2, result = result * 33 + char
uint64_t result = 5381;
for (int c = 0; string[c] != '\0'; c++) {
for (int c = 0; c < n; c++) {
result = ((result << 5) + result) + string[c];
}
return result;
@ -120,7 +120,7 @@ uint64_t getHostHash(void) {
uname[offset]='\0';
TRACE(NCCL_INIT,"unique hostname '%s'", uname);
return getHash(uname);
return getHash(uname, strlen(uname));
}
/* Generate a hash of the unique identifying string for this process
@ -140,7 +140,7 @@ uint64_t getPidHash(void) {
pname[plen+len]='\0';
TRACE(NCCL_INIT,"unique PID '%s'", pname);
return getHash(pname);
return getHash(pname, strlen(pname));
}
int parseStringList(const char* string, struct netIf* ifList, int maxList) {