This repository was archived by the owner on Sep 8, 2020. It is now read-only.
Repository navigation
Expand file tree
/
Copy pathAffinity.c
More file actions
111 lines (94 loc) · 2.57 KB
/
Copy pathAffinity.c
File metadata and controls
111 lines (94 loc) · 2.57 KB
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
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
/*
htop - Affinity.c
(C) 2004-2011 Hisham H. Muhammad
Released under the GNU GPL, see the COPYING file
in the source distribution for its full text.
*/
#include "Affinity.h"
#include <stdlib.h>
#ifdef HAVE_LIBHWLOC
#include <hwloc/linux.h>
#elif HAVE_NATIVE_AFFINITY
#include <sched.h>
#endif
/*{
#include "Process.h"
#include "ProcessList.h"
typedef struct Affinity_ {
ProcessList* pl;
int size;
int used;
int* cpus;
} Affinity;
}*/
Affinity* Affinity_new(ProcessList* pl) {
Affinity* this = calloc(1, sizeof(Affinity));
this->size = 8;
this->cpus = calloc(this->size, sizeof(int));
this->pl = pl;
return this;
}
void Affinity_delete(Affinity* this) {
free(this->cpus);
free(this);
}
void Affinity_add(Affinity* this, int id) {
if (this->used == this->size) {
this->size *= 2;
this->cpus = realloc(this->cpus, sizeof(int) * this->size);
}
this->cpus[this->used] = id;
this->used++;
}
#ifdef HAVE_LIBHWLOC
Affinity* Affinity_get(Process* proc, ProcessList* pl) {
hwloc_cpuset_t cpuset = hwloc_bitmap_alloc();
bool ok = (hwloc_linux_get_tid_cpubind(pl->topology, proc->pid, cpuset) == 0);
Affinity* affinity = NULL;
if (ok) {
affinity = Affinity_new(pl);
if (hwloc_bitmap_last(cpuset) == -1) {
for (int i = 0; i < pl->cpuCount; i++) {
Affinity_add(affinity, i);
}
} else {
unsigned int id;
hwloc_bitmap_foreach_begin(id, cpuset);
Affinity_add(affinity, id);
hwloc_bitmap_foreach_end();
}
}
hwloc_bitmap_free(cpuset);
return affinity;
}
bool Affinity_set(Process* proc, Affinity* this) {
hwloc_cpuset_t cpuset = hwloc_bitmap_alloc();
for (int i = 0; i < affinity->used; i++) {
hwloc_bitmap_set(cpuset, affinity->cpus[i]);
}
bool ok = (hwloc_linux_set_tid_cpubind(this->pl->topology, proc->pid, cpuset) == 0);
hwloc_bitmap_free(cpuset);
return ok;
}
#elif HAVE_NATIVE_AFFINITY
Affinity* Affinity_get(Process* proc, ProcessList* pl) {
cpu_set_t cpuset;
bool ok = (sched_getaffinity(proc->pid, sizeof(cpu_set_t), &cpuset) == 0);
if (!ok) return NULL;
Affinity* affinity = Affinity_new(pl);
for (int i = 0; i < pl->cpuCount; i++) {
if (CPU_ISSET(i, &cpuset))
Affinity_add(affinity, i);
}
return affinity;
}
bool Affinity_set(Process* proc, Affinity* this) {
cpu_set_t cpuset;
CPU_ZERO(&cpuset);
for (int i = 0; i < this->used; i++) {
CPU_SET(this->cpus[i], &cpuset);
}
bool ok = (sched_setaffinity(proc->pid, sizeof(unsigned long), &cpuset) == 0);
return ok;
}
#endif