Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_setaffinity.c @ 5707:31dd63dcb9ea
Events: use eventfd() instead of syscall(SYS_eventfd) if possible.
This fixes --with-file-aio support on systems that lack eventfd()
syscall, notably aarch64 Linux.
The syscall(SYS_eventfd) may still be necessary on systems that
have eventfd() syscall in the kernel but lack it in glibc, e.g.
as seen in the current CentOS 5 release.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Fri, 23 May 2014 16:37:05 +0400 |
parents | f31162fefe01 |
children | 7296b38f6416 |
rev | line source |
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worker_cpu_affinity: cleaned up Linux implementation, added FreeBSD support.
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1 |
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2 /* |
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3 * Copyright (C) Nginx, Inc. |
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4 */ |
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5 |
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6 |
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7 #include <ngx_config.h> |
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8 #include <ngx_core.h> |
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9 |
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10 |
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11 #if (NGX_HAVE_CPUSET_SETAFFINITY) |
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12 |
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13 #include <sys/cpuset.h> |
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14 |
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15 void |
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16 ngx_setaffinity(uint64_t cpu_affinity, ngx_log_t *log) |
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17 { |
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18 cpuset_t mask; |
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19 ngx_uint_t i; |
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20 |
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21 ngx_log_error(NGX_LOG_NOTICE, log, 0, |
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22 "cpuset_setaffinity(0x%08Xl)", cpu_affinity); |
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23 |
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24 CPU_ZERO(&mask); |
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25 i = 0; |
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26 do { |
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27 if (cpu_affinity & 1) { |
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28 CPU_SET(i, &mask); |
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29 } |
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30 i++; |
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31 cpu_affinity >>= 1; |
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32 } while (cpu_affinity); |
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33 |
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34 if (cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1, |
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35 sizeof(cpuset_t), &mask) == -1) |
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36 { |
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37 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
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38 "cpuset_setaffinity() failed"); |
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39 } |
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40 } |
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41 |
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42 #elif (NGX_HAVE_SCHED_SETAFFINITY) |
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43 |
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44 void |
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45 ngx_setaffinity(uint64_t cpu_affinity, ngx_log_t *log) |
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46 { |
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47 cpu_set_t mask; |
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48 ngx_uint_t i; |
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49 |
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50 ngx_log_error(NGX_LOG_NOTICE, log, 0, |
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51 "sched_setaffinity(0x%08Xl)", cpu_affinity); |
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52 |
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53 CPU_ZERO(&mask); |
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54 i = 0; |
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55 do { |
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56 if (cpu_affinity & 1) { |
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57 CPU_SET(i, &mask); |
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58 } |
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59 i++; |
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60 cpu_affinity >>= 1; |
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61 } while (cpu_affinity); |
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62 |
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63 if (sched_setaffinity(0, sizeof(cpu_set_t), &mask) == -1) { |
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64 ngx_log_error(NGX_LOG_ALERT, log, ngx_errno, |
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65 "sched_setaffinity() failed"); |
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66 } |
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67 } |
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68 |
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69 #endif |