Mercurial > hg > nginx
view src/core/ngx_cycle.h @ 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> |
---|---|
date | Wed, 20 May 2015 15:51:56 +0300 |
parents | 967594ba7571 |
children | 1b7e246e6b38 |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_CYCLE_H_INCLUDED_ #define _NGX_CYCLE_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> #ifndef NGX_CYCLE_POOL_SIZE #define NGX_CYCLE_POOL_SIZE NGX_DEFAULT_POOL_SIZE #endif #define NGX_DEBUG_POINTS_STOP 1 #define NGX_DEBUG_POINTS_ABORT 2 typedef struct ngx_shm_zone_s ngx_shm_zone_t; typedef ngx_int_t (*ngx_shm_zone_init_pt) (ngx_shm_zone_t *zone, void *data); struct ngx_shm_zone_s { void *data; ngx_shm_t shm; ngx_shm_zone_init_pt init; void *tag; ngx_uint_t noreuse; /* unsigned noreuse:1; */ }; struct ngx_cycle_s { void ****conf_ctx; ngx_pool_t *pool; ngx_log_t *log; ngx_log_t new_log; ngx_uint_t log_use_stderr; /* unsigned log_use_stderr:1; */ ngx_connection_t **files; ngx_connection_t *free_connections; ngx_uint_t free_connection_n; ngx_queue_t reusable_connections_queue; ngx_array_t listening; ngx_array_t paths; ngx_list_t open_files; ngx_list_t shared_memory; ngx_uint_t connection_n; ngx_uint_t files_n; ngx_connection_t *connections; ngx_event_t *read_events; ngx_event_t *write_events; ngx_cycle_t *old_cycle; ngx_str_t conf_file; ngx_str_t conf_param; ngx_str_t conf_prefix; ngx_str_t prefix; ngx_str_t lock_file; ngx_str_t hostname; }; typedef struct { ngx_flag_t daemon; ngx_flag_t master; ngx_msec_t timer_resolution; ngx_int_t worker_processes; ngx_int_t debug_points; ngx_int_t rlimit_nofile; off_t rlimit_core; int priority; ngx_uint_t cpu_affinity_n; uint64_t *cpu_affinity; char *username; ngx_uid_t user; ngx_gid_t group; ngx_str_t working_directory; ngx_str_t lock_file; ngx_str_t pid; ngx_str_t oldpid; ngx_array_t env; char **environment; } ngx_core_conf_t; #define ngx_is_init_cycle(cycle) (cycle->conf_ctx == NULL) ngx_cycle_t *ngx_init_cycle(ngx_cycle_t *old_cycle); ngx_int_t ngx_create_pidfile(ngx_str_t *name, ngx_log_t *log); void ngx_delete_pidfile(ngx_cycle_t *cycle); ngx_int_t ngx_signal_process(ngx_cycle_t *cycle, char *sig); void ngx_reopen_files(ngx_cycle_t *cycle, ngx_uid_t user); char **ngx_set_environment(ngx_cycle_t *cycle, ngx_uint_t *last); ngx_pid_t ngx_exec_new_binary(ngx_cycle_t *cycle, char *const *argv); uint64_t ngx_get_cpu_affinity(ngx_uint_t n); ngx_shm_zone_t *ngx_shared_memory_add(ngx_conf_t *cf, ngx_str_t *name, size_t size, void *tag); extern volatile ngx_cycle_t *ngx_cycle; extern ngx_array_t ngx_old_cycles; extern ngx_module_t ngx_core_module; extern ngx_uint_t ngx_test_config; extern ngx_uint_t ngx_quiet_mode; #endif /* _NGX_CYCLE_H_INCLUDED_ */