Sylvain Jeaugey
f3d5166783
Add support for 400Gbit NDR network adapters (CX7) Handle EINTR in socket poll() function Add NCCL_PROGRESS_APPENDOP_FREQ to control op append overhead Resource cleanup fixes Fix double free in case of init failure Fix crash in ncclCommAbort Revert AMD speed commit
82 строки
2.3 KiB
C++
82 строки
2.3 KiB
C++
/*************************************************************************
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* Copyright (c) 2019-2022, 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 "param.h"
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#include "debug.h"
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#include <algorithm>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <pthread.h>
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#include <pwd.h>
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const char* userHomeDir() {
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struct passwd *pwUser = getpwuid(getuid());
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return pwUser == NULL ? NULL : pwUser->pw_dir;
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}
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void setEnvFile(const char* fileName) {
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FILE * file = fopen(fileName, "r");
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if (file == NULL) return;
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char *line = NULL;
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char envVar[1024];
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char envValue[1024];
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size_t n = 0;
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ssize_t read;
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while ((read = getline(&line, &n, file)) != -1) {
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if (line[read-1] == '\n') line[read-1] = '\0';
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int s=0; // Env Var Size
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while (line[s] != '\0' && line[s] != '=') s++;
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if (line[s] == '\0') continue;
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strncpy(envVar, line, std::min(1023,s));
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envVar[s] = '\0';
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s++;
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strncpy(envValue, line+s, 1023);
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envValue[1023]='\0';
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setenv(envVar, envValue, 0);
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//printf("%s : %s->%s\n", fileName, envVar, envValue);
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}
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if (line) free(line);
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fclose(file);
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}
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void initEnv() {
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char confFilePath[1024];
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const char * userDir = userHomeDir();
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if (userDir) {
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sprintf(confFilePath, "%s/.nccl.conf", userDir);
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setEnvFile(confFilePath);
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}
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sprintf(confFilePath, "/etc/nccl.conf");
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setEnvFile(confFilePath);
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}
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void ncclLoadParam(char const* env, int64_t deftVal, int64_t uninitialized, int64_t* cache) {
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static pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
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pthread_mutex_lock(&mutex);
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if (__atomic_load_n(cache, __ATOMIC_RELAXED) == uninitialized) {
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char* str = getenv(env);
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int64_t value = deftVal;
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if (str && strlen(str) > 0) {
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errno = 0;
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value = strtoll(str, nullptr, 0);
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if (errno) {
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value = deftVal;
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INFO(NCCL_ALL,"Invalid value %s for %s, using default %lld.", str, env, (long long)deftVal);
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} else {
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INFO(NCCL_ENV,"%s set by environment to %lld.", env, (long long)value);
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}
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}
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__atomic_store_n(cache, value, __ATOMIC_RELAXED);
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}
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pthread_mutex_unlock(&mutex);
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}
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