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src/os/unix/ngx_setaffinity.c - nginx source code

Functions defined

Source code


  2. /*
  3. * Copyright (C) Nginx, Inc.
  4. */


  7. #include <ngx_config.h>
  8. #include <ngx_core.h>


  11. #if (NGX_HAVE_CPUSET_SETAFFINITY)

  13. void
  14. ‌ngx_setaffinity(ngx_cpuset_t *cpu_affinity, ngx_log_t *log)
  15. {
  16.     ngx_uint_t  i;

  18.     for (i = 0; i < CPU_SETSIZE; i++) {
  19.         if (CPU_ISSET(i, cpu_affinity)) {
  20.             ngx_log_error(NGX_LOG_NOTICE, log, 0,
  21.                           "cpuset_setaffinity(): using cpu #%ui", i);
  22.         }
  23.     }

  25.     if (cpuset_setaffinity(CPU_LEVEL_WHICH, CPU_WHICH_PID, -1,
  26.                            sizeof(cpuset_t), cpu_affinity) == -1)
  27.     {
  28.         ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
  29.                       "cpuset_setaffinity() failed");
  30.     }
  31. }

  33. #elif (NGX_HAVE_SCHED_SETAFFINITY)

  35. void
  36. ‌ngx_setaffinity(ngx_cpuset_t *cpu_affinity, ngx_log_t *log)
  37. {
  38.     ngx_uint_t  i;

  40.     for (i = 0; i < CPU_SETSIZE; i++) {
  41.         if (CPU_ISSET(i, cpu_affinity)) {
  42.             ngx_log_error(NGX_LOG_NOTICE, log, 0,
  43.                           "sched_setaffinity(): using cpu #%ui", i);
  44.         }
  45.     }

  47.     if (sched_setaffinity(0, sizeof(cpu_set_t), cpu_affinity) == -1) {
  48.         ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
  49.                       "sched_setaffinity() failed");
  50.     }
  51. }

  53. #endif

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