David Addison
f40ce73e89
Added detection of IBM/Power NVLink bridge device.
Add NUMA support to PCI distance calculations.
Added NCCL_IGNORE_CPU_AFFINITY env var.
Fix memory leaks; GithubIssue#180
Compiler warning fix; GithubIssue#178
Replace non-standard variable length arrays. GithubIssue#171
Fix Tree+Shared Memory crash. GithubPR#185
Fix LL cleanup hang during long running DL jobs.
Fix NCCL_RINGS environment variable handling.
Added extra checks to catch repeat calls to ncclCommDestroy() GithubIssue#191
Improve bootstrap socket connection reliability at scale.
Fix hostname hashing issue. GithubIssue#187
Code cleanup to rename all non device files from *.cu to *.cc
62 baris
1.5 KiB
C
62 baris
1.5 KiB
C
/*************************************************************************
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* Copyright (c) 2018-2019, 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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#ifndef NCCL_CPUSET_H_
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#define NCCL_CPUSET_H_
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// Convert local_cpus, e.g. 0003ff,f0003fff to cpu_set_t
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static int hexToInt(char c) {
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int v = c - '0';
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if (v < 0) return -1;
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if (v > 9) v = 10 + c - 'a';
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if ((v < 0) || (v > 15)) return -1;
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return v;
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}
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#define CPU_SET_N_U32 (sizeof(cpu_set_t)/sizeof(uint32_t))
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ncclResult_t ncclStrToCpuset(char* str, cpu_set_t* mask) {
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uint32_t cpumasks[CPU_SET_N_U32];
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int m = CPU_SET_N_U32-1;
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cpumasks[m] = 0;
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for (int o=0; o<strlen(str); o++) {
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char c = str[o];
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if (c == ',') {
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m--;
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cpumasks[m] = 0;
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} else {
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int v = hexToInt(c);
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if (v == -1) break;
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cpumasks[m] <<= 4;
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cpumasks[m] += v;
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}
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}
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// Copy cpumasks to mask
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for (int a=0; m<CPU_SET_N_U32; a++,m++) {
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memcpy(((uint32_t*)mask)+a, cpumasks+m, sizeof(uint32_t));
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}
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return ncclSuccess;
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}
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ncclResult_t ncclCpusetToStr(cpu_set_t* mask, char* str) {
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int c = 0;
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uint8_t* m8 = (uint8_t*)mask;
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for (int o=sizeof(cpu_set_t)-1; o>=0; o--) {
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if (c == 0 && m8[o] == 0) continue;
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sprintf(str+c, "%02x", m8[o]);
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c+=2;
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if (o && o%4 == 0) {
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sprintf(str+c, ",");
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c++;
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}
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}
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str[c] = '\0';
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return ncclSuccess;
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}
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#endif
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