be2a2176ce
Benchmarks demonstrated that the idle timer handle approach didn't balance the load quite fair enough, the majority of new connections still ended up in one or two processes. The new approach voluntarily gives up a scheduler timeslice by calling nanosleep() with a one nanosecond timeout. Why not sched_yield()? Because on Linux (and this is probably true for other Unices as well), sched_yield() only yields if there are other processes running on the same CPU. nanosleep() on the other hand always forces the process to sleep, which gives other processes a chance to accept our pending connections.
267 lines
12 KiB
C
267 lines
12 KiB
C
/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to
|
|
* deal in the Software without restriction, including without limitation the
|
|
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
|
|
* sell copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
* IN THE SOFTWARE.
|
|
*/
|
|
|
|
#ifndef UV_UNIX_H
|
|
#define UV_UNIX_H
|
|
|
|
#include "ngx-queue.h"
|
|
|
|
#include "ev.h"
|
|
#include "eio.h"
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
|
|
#include <sys/socket.h>
|
|
#include <netinet/in.h>
|
|
#include <netinet/tcp.h>
|
|
#include <arpa/inet.h>
|
|
#include <netdb.h>
|
|
|
|
#include <termios.h>
|
|
#include <pwd.h>
|
|
|
|
#include <semaphore.h>
|
|
#include <pthread.h>
|
|
#include <signal.h>
|
|
|
|
struct uv__io_s;
|
|
struct uv_loop_s;
|
|
|
|
typedef struct uv__io_s uv__io_t;
|
|
typedef void (*uv__io_cb)(struct uv_loop_s* loop, uv__io_t* handle, int events);
|
|
|
|
struct uv__io_s {
|
|
ev_io io_watcher;
|
|
};
|
|
|
|
#if defined(__linux__)
|
|
# include "uv-linux.h"
|
|
#elif defined(__sun)
|
|
# include "uv-sunos.h"
|
|
#elif defined(__APPLE__)
|
|
# include "uv-darwin.h"
|
|
#elif defined(__DragonFly__) || \
|
|
defined(__FreeBSD__) || \
|
|
defined(__OpenBSD__) || \
|
|
defined(__NetBSD__)
|
|
# include "uv-bsd.h"
|
|
#endif
|
|
|
|
#ifndef UV_PLATFORM_SEM_T
|
|
# define UV_PLATFORM_SEM_T sem_t
|
|
#endif
|
|
|
|
#ifndef UV_PLATFORM_LOOP_FIELDS
|
|
# define UV_PLATFORM_LOOP_FIELDS /* empty */
|
|
#endif
|
|
|
|
#ifndef UV_PLATFORM_FS_EVENT_FIELDS
|
|
# define UV_PLATFORM_FS_EVENT_FIELDS /* empty */
|
|
#endif
|
|
|
|
#ifndef UV_STREAM_PRIVATE_PLATFORM_FIELDS
|
|
# define UV_STREAM_PRIVATE_PLATFORM_FIELDS /* empty */
|
|
#endif
|
|
|
|
/* Note: May be cast to struct iovec. See writev(2). */
|
|
typedef struct {
|
|
char* base;
|
|
size_t len;
|
|
} uv_buf_t;
|
|
|
|
typedef int uv_file;
|
|
typedef int uv_os_sock_t;
|
|
typedef struct stat uv_statbuf_t;
|
|
|
|
#define UV_ONCE_INIT PTHREAD_ONCE_INIT
|
|
|
|
typedef pthread_once_t uv_once_t;
|
|
typedef pthread_t uv_thread_t;
|
|
typedef pthread_mutex_t uv_mutex_t;
|
|
typedef pthread_rwlock_t uv_rwlock_t;
|
|
typedef UV_PLATFORM_SEM_T uv_sem_t;
|
|
|
|
/* Platform-specific definitions for uv_spawn support. */
|
|
typedef gid_t uv_gid_t;
|
|
typedef uid_t uv_uid_t;
|
|
|
|
/* Platform-specific definitions for uv_dlopen support. */
|
|
#define UV_DYNAMIC /* empty */
|
|
|
|
typedef struct {
|
|
void* handle;
|
|
char* errmsg;
|
|
} uv_lib_t;
|
|
|
|
#define UV_LOOP_PRIVATE_FIELDS \
|
|
unsigned long flags; \
|
|
/* Poll result queue */ \
|
|
eio_channel uv_eio_channel; \
|
|
struct ev_loop* ev; \
|
|
/* Various thing for libeio. */ \
|
|
uv_async_t uv_eio_want_poll_notifier; \
|
|
uv_async_t uv_eio_done_poll_notifier; \
|
|
uv_idle_t uv_eio_poller; \
|
|
uv_handle_t* closing_handles; \
|
|
ngx_queue_t process_handles[1]; \
|
|
ngx_queue_t prepare_handles; \
|
|
ngx_queue_t check_handles; \
|
|
ngx_queue_t idle_handles; \
|
|
ngx_queue_t async_handles; \
|
|
uv__io_t async_watcher; \
|
|
int async_pipefd[2]; \
|
|
/* RB_HEAD(uv__timers, uv_timer_s) */ \
|
|
struct uv__timers { \
|
|
struct uv_timer_s* rbh_root; \
|
|
} timer_handles; \
|
|
uint64_t time; \
|
|
void* signal_ctx; \
|
|
uv_signal_t child_watcher; \
|
|
int emfile_fd; \
|
|
UV_PLATFORM_LOOP_FIELDS \
|
|
|
|
#define UV_REQ_TYPE_PRIVATE /* empty */
|
|
|
|
#define UV_REQ_PRIVATE_FIELDS /* empty */
|
|
|
|
#define UV_PRIVATE_REQ_TYPES /* empty */
|
|
|
|
#define UV_WRITE_PRIVATE_FIELDS \
|
|
ngx_queue_t queue; \
|
|
int write_index; \
|
|
uv_buf_t* bufs; \
|
|
int bufcnt; \
|
|
int error; \
|
|
uv_buf_t bufsml[4]; \
|
|
|
|
#define UV_CONNECT_PRIVATE_FIELDS \
|
|
ngx_queue_t queue; \
|
|
|
|
#define UV_SHUTDOWN_PRIVATE_FIELDS /* empty */
|
|
|
|
#define UV_UDP_SEND_PRIVATE_FIELDS \
|
|
ngx_queue_t queue; \
|
|
struct sockaddr_in6 addr; \
|
|
int bufcnt; \
|
|
uv_buf_t* bufs; \
|
|
ssize_t status; \
|
|
uv_udp_send_cb send_cb; \
|
|
uv_buf_t bufsml[4]; \
|
|
|
|
#define UV_HANDLE_PRIVATE_FIELDS \
|
|
int flags; \
|
|
uv_handle_t* next_closing; \
|
|
|
|
#define UV_STREAM_PRIVATE_FIELDS \
|
|
uv_connect_t *connect_req; \
|
|
uv_shutdown_t *shutdown_req; \
|
|
uv__io_t read_watcher; \
|
|
uv__io_t write_watcher; \
|
|
ngx_queue_t write_queue; \
|
|
ngx_queue_t write_completed_queue; \
|
|
uv_connection_cb connection_cb; \
|
|
int delayed_error; \
|
|
int accepted_fd; \
|
|
int fd; \
|
|
UV_STREAM_PRIVATE_PLATFORM_FIELDS \
|
|
|
|
#define UV_TCP_PRIVATE_FIELDS /* empty */
|
|
|
|
#define UV_UDP_PRIVATE_FIELDS \
|
|
int fd; \
|
|
uv_alloc_cb alloc_cb; \
|
|
uv_udp_recv_cb recv_cb; \
|
|
uv__io_t read_watcher; \
|
|
uv__io_t write_watcher; \
|
|
ngx_queue_t write_queue; \
|
|
ngx_queue_t write_completed_queue; \
|
|
|
|
#define UV_PIPE_PRIVATE_FIELDS \
|
|
const char* pipe_fname; /* strdup'ed */
|
|
|
|
#define UV_POLL_PRIVATE_FIELDS \
|
|
int fd; \
|
|
uv__io_t io_watcher;
|
|
|
|
#define UV_PREPARE_PRIVATE_FIELDS \
|
|
uv_prepare_cb prepare_cb; \
|
|
ngx_queue_t queue;
|
|
|
|
#define UV_CHECK_PRIVATE_FIELDS \
|
|
uv_check_cb check_cb; \
|
|
ngx_queue_t queue;
|
|
|
|
#define UV_IDLE_PRIVATE_FIELDS \
|
|
uv_idle_cb idle_cb; \
|
|
ngx_queue_t queue;
|
|
|
|
#define UV_ASYNC_PRIVATE_FIELDS \
|
|
volatile sig_atomic_t pending; \
|
|
uv_async_cb async_cb; \
|
|
ngx_queue_t queue;
|
|
|
|
#define UV_TIMER_PRIVATE_FIELDS \
|
|
/* RB_ENTRY(uv_timer_s) node; */ \
|
|
struct { \
|
|
struct uv_timer_s* rbe_left; \
|
|
struct uv_timer_s* rbe_right; \
|
|
struct uv_timer_s* rbe_parent; \
|
|
int rbe_color; \
|
|
} tree_entry; \
|
|
uv_timer_cb timer_cb; \
|
|
uint64_t timeout; \
|
|
uint64_t repeat;
|
|
|
|
#define UV_GETADDRINFO_PRIVATE_FIELDS \
|
|
uv_getaddrinfo_cb cb; \
|
|
struct addrinfo* hints; \
|
|
char* hostname; \
|
|
char* service; \
|
|
struct addrinfo* res; \
|
|
int retcode;
|
|
|
|
#define UV_PROCESS_PRIVATE_FIELDS \
|
|
ngx_queue_t queue; \
|
|
int errorno; \
|
|
|
|
#define UV_FS_PRIVATE_FIELDS \
|
|
struct stat statbuf; \
|
|
uv_file file; \
|
|
eio_req* eio; \
|
|
|
|
#define UV_WORK_PRIVATE_FIELDS \
|
|
eio_req* eio;
|
|
|
|
#define UV_TTY_PRIVATE_FIELDS \
|
|
struct termios orig_termios; \
|
|
int mode;
|
|
|
|
#define UV_SIGNAL_PRIVATE_FIELDS \
|
|
ngx_queue_t queue;
|
|
|
|
#define UV_FS_EVENT_PRIVATE_FIELDS \
|
|
uv_fs_event_cb cb; \
|
|
UV_PLATFORM_FS_EVENT_FIELDS \
|
|
|
|
#endif /* UV_UNIX_H */
|