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comparison src/os/unix/ngx_setaffinity.c @ 4549:f31162fefe01

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worker_cpu_affinity: cleaned up Linux implementation, added FreeBSD support.
author Ruslan Ermilov <ru@nginx.com>
date Wed, 21 Mar 2012 13:58:51 +0000
parents
children 7296b38f6416
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4548:4c1e6cef1453 4549:f31162fefe01
1
2 /*
3 * Copyright (C) Nginx, Inc.
4 */
5
6
7 #include <ngx_config.h>
8 #include <ngx_core.h>
9
10
11 #if (NGX_HAVE_CPUSET_SETAFFINITY)
12
13 #include <sys/cpuset.h>
14
15 void
16 ngx_setaffinity(uint64_t cpu_affinity, ngx_log_t *log)
17 {
18 cpuset_t mask;
19 ngx_uint_t i;
20
21 ngx_log_error(NGX_LOG_NOTICE, log, 0,
22 "cpuset_setaffinity(0x%08Xl)", cpu_affinity);
23
24 CPU_ZERO(&mask);
25 i = 0;
26 do {
27 if (cpu_affinity & 1) {
28 CPU_SET(i, &mask);
29 }
30 i++;
31 cpu_affinity >>= 1;
32 } while (cpu_affinity);
33
34 if (cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1,
35 sizeof(cpuset_t), &mask) == -1)
36 {
37 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
38 "cpuset_setaffinity() failed");
39 }
40 }
41
42 #elif (NGX_HAVE_SCHED_SETAFFINITY)
43
44 void
45 ngx_setaffinity(uint64_t cpu_affinity, ngx_log_t *log)
46 {
47 cpu_set_t mask;
48 ngx_uint_t i;
49
50 ngx_log_error(NGX_LOG_NOTICE, log, 0,
51 "sched_setaffinity(0x%08Xl)", cpu_affinity);
52
53 CPU_ZERO(&mask);
54 i = 0;
55 do {
56 if (cpu_affinity & 1) {
57 CPU_SET(i, &mask);
58 }
59 i++;
60 cpu_affinity >>= 1;
61 } while (cpu_affinity);
62
63 if (sched_setaffinity(0, sizeof(cpu_set_t), &mask) == -1) {
64 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
65 "sched_setaffinity() failed");
66 }
67 }
68
69 #endif