Mercurial > hg > nginx
comparison src/os/unix/ngx_setaffinity.c @ 4549:f31162fefe01
worker_cpu_affinity: cleaned up Linux implementation, added FreeBSD support.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Wed, 21 Mar 2012 13:58:51 +0000 |
parents | |
children | 7296b38f6416 |
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4548:4c1e6cef1453 | 4549:f31162fefe01 |
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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 |