Mercurial > hg > nginx
comparison src/core/ngx_cycle.c @ 6153:4f6efabcb09b
The "reuseport" option of the "listen" directive.
When configured, an individual listen socket on a given address is
created for each worker process. This allows to reduce in-kernel lock
contention on configurations with high accept rates, resulting in better
performance. As of now it works on Linux and DragonFly BSD.
Note that on Linux incoming connection requests are currently tied up
to a specific listen socket, and if some sockets are closed, connection
requests will be reset, see https://lwn.net/Articles/542629/. With
nginx, this may happen if the number of worker processes is reduced.
There is no such problem on DragonFly BSD.
Based on previous work by Sepherosa Ziehau and Yingqi Lu.
author | Maxim Dounin <mdounin@mdounin.ru> |
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date | Wed, 20 May 2015 15:51:56 +0300 |
parents | af7eba90645d |
children | 1b7e246e6b38 |
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6152:3c344ea7d88b | 6153:4f6efabcb09b |
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491 for (i = 0; i < old_cycle->listening.nelts; i++) { | 491 for (i = 0; i < old_cycle->listening.nelts; i++) { |
492 if (ls[i].ignore) { | 492 if (ls[i].ignore) { |
493 continue; | 493 continue; |
494 } | 494 } |
495 | 495 |
496 if (ls[i].remain) { | |
497 continue; | |
498 } | |
499 | |
496 if (ngx_cmp_sockaddr(nls[n].sockaddr, nls[n].socklen, | 500 if (ngx_cmp_sockaddr(nls[n].sockaddr, nls[n].socklen, |
497 ls[i].sockaddr, ls[i].socklen, 1) | 501 ls[i].sockaddr, ls[i].socklen, 1) |
498 == NGX_OK) | 502 == NGX_OK) |
499 { | 503 { |
500 nls[n].fd = ls[i].fd; | 504 nls[n].fd = ls[i].fd; |
538 } else if (ls[i].deferred_accept != nls[n].deferred_accept) | 542 } else if (ls[i].deferred_accept != nls[n].deferred_accept) |
539 { | 543 { |
540 nls[n].add_deferred = 1; | 544 nls[n].add_deferred = 1; |
541 } | 545 } |
542 #endif | 546 #endif |
547 | |
548 #if (NGX_HAVE_REUSEPORT) | |
549 if (nls[n].reuseport && !ls[i].reuseport) { | |
550 nls[n].add_reuseport = 1; | |
551 } | |
552 #endif | |
553 | |
543 break; | 554 break; |
544 } | 555 } |
545 } | 556 } |
546 | 557 |
547 if (nls[n].fd == (ngx_socket_t) -1) { | 558 if (nls[n].fd == (ngx_socket_t) -1) { |