Mercurial > hg > nginx
annotate src/os/unix/ngx_setaffinity.h @ 7583:efd71d49bde0
Events: available bytes calculation via ioctl(FIONREAD).
This makes it possible to avoid looping for a long time while working
with a fast enough peer when data are added to the socket buffer faster
than we are able to read and process them (ticket #1431). This is
basically what we already do on FreeBSD with kqueue, where information
about the number of bytes in the socket buffer is returned by
the kevent() call.
With other event methods rev->available is now set to -1 when the socket
is ready for reading. Later in ngx_recv() and ngx_recv_chain(), if
full buffer is received, real number of bytes in the socket buffer is
retrieved using ioctl(FIONREAD). Reading more than this number of bytes
ensures that even with edge-triggered event methods the event will be
triggered again, so it is safe to stop processing of the socket and
switch to other connections.
Using ioctl(FIONREAD) only after reading a full buffer is an optimization.
With this approach we only call ioctl(FIONREAD) when there are at least
two recv()/readv() calls.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Thu, 17 Oct 2019 16:02:19 +0300 |
parents | 7296b38f6416 |
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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 #ifndef _NGX_SETAFFINITY_H_INCLUDED_ |
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7 #define _NGX_SETAFFINITY_H_INCLUDED_ |
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8 |
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9 |
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10 #if (NGX_HAVE_SCHED_SETAFFINITY || NGX_HAVE_CPUSET_SETAFFINITY) |
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11 |
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12 #define NGX_HAVE_CPU_AFFINITY 1 |
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6402
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Core: added support for more than 64 CPUs in worker_cpu_affinity.
Vladimir Homutov <vl@nginx.com>
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14 #if (NGX_HAVE_SCHED_SETAFFINITY) |
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15 |
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Vladimir Homutov <vl@nginx.com>
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16 typedef cpu_set_t ngx_cpuset_t; |
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17 |
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Vladimir Homutov <vl@nginx.com>
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18 #elif (NGX_HAVE_CPUSET_SETAFFINITY) |
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19 |
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Core: added support for more than 64 CPUs in worker_cpu_affinity.
Vladimir Homutov <vl@nginx.com>
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20 #include <sys/cpuset.h> |
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Vladimir Homutov <vl@nginx.com>
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21 |
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Vladimir Homutov <vl@nginx.com>
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22 typedef cpuset_t ngx_cpuset_t; |
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23 |
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Core: added support for more than 64 CPUs in worker_cpu_affinity.
Vladimir Homutov <vl@nginx.com>
parents:
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24 #endif |
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Vladimir Homutov <vl@nginx.com>
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25 |
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Core: added support for more than 64 CPUs in worker_cpu_affinity.
Vladimir Homutov <vl@nginx.com>
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26 void ngx_setaffinity(ngx_cpuset_t *cpu_affinity, ngx_log_t *log); |
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27 |
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28 #else |
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29 |
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30 #define ngx_setaffinity(cpu_affinity, log) |
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31 |
6402
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Core: added support for more than 64 CPUs in worker_cpu_affinity.
Vladimir Homutov <vl@nginx.com>
parents:
4549
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32 typedef uint64_t ngx_cpuset_t; |
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Core: added support for more than 64 CPUs in worker_cpu_affinity.
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33 |
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Ruslan Ermilov <ru@nginx.com>
parents:
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34 #endif |
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35 |
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Ruslan Ermilov <ru@nginx.com>
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36 |
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worker_cpu_affinity: cleaned up Linux implementation, added FreeBSD support.
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37 #endif /* _NGX_SETAFFINITY_H_INCLUDED_ */ |