Mercurial > hg > nginx
comparison src/event/ngx_event.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 | b19350b896bb |
children | 193bbc006d5e |
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6152:3c344ea7d88b | 6153:4f6efabcb09b |
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723 /* for each listening socket */ | 723 /* for each listening socket */ |
724 | 724 |
725 ls = cycle->listening.elts; | 725 ls = cycle->listening.elts; |
726 for (i = 0; i < cycle->listening.nelts; i++) { | 726 for (i = 0; i < cycle->listening.nelts; i++) { |
727 | 727 |
728 #if (NGX_HAVE_REUSEPORT) | |
729 if (ls[i].reuseport && ls[i].worker != ngx_worker) { | |
730 continue; | |
731 } | |
732 #endif | |
733 | |
728 c = ngx_get_connection(ls[i].fd, cycle->log); | 734 c = ngx_get_connection(ls[i].fd, cycle->log); |
729 | 735 |
730 if (c == NULL) { | 736 if (c == NULL) { |
731 return NGX_ERROR; | 737 return NGX_ERROR; |
732 } | 738 } |