1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
/*************************************************************************
* Copyright (c) 2016-2019, NVIDIA CORPORATION. All rights reserved.
*
* See LICENSE.txt for license information
************************************************************************/
#ifndef NCCL_TOPO_H_
#define NCCL_TOPO_H_
#include "nccl.h"
#include <limits.h>
#include <stdlib.h>
#include <ctype.h>
#include <stdio.h>
ncclResult_t getCudaPath(int cudaDev, char** path);
static int getNumaId(char *path) {
char npath[PATH_MAX];
snprintf(npath, PATH_MAX, "%s/numa_node", path);
npath[PATH_MAX-1] = '\0';
int numaId = -1;
FILE *file = fopen(npath, "r");
if (file == NULL) return -1;
if (fscanf(file, "%d", &numaId) == EOF) { fclose(file); return -1; }
fclose(file);
return numaId;
}
enum ncclPathDist {
PATH_PIX = 0,
PATH_PXB = 1,
PATH_PHB = 2,
PATH_NODE = 3,
PATH_SYS = 4,
PATH_ARRAY_SIZE = 5
};
extern const char* pathDists[PATH_ARRAY_SIZE];
int pciDistance(char* path1, char* path2);
#endif
|
