Mercurial > hg > nginx
view src/os/unix/ngx_time.h @ 7985:ec2e6893caaa
Simplified sendfile(SF_NODISKIO) usage.
Starting with FreeBSD 11, there is no need to use AIO operations to preload
data into cache for sendfile(SF_NODISKIO) to work. Instead, sendfile()
handles non-blocking loading data from disk by itself. It still can, however,
return EBUSY if a page is already being loaded (for example, by a different
process). If this happens, we now post an event for the next event loop
iteration, so sendfile() is retried "after a short period", as manpage
recommends.
The limit of the number of EBUSY tolerated without any progress is preserved,
but now it does not result in an alert, since on an idle system event loop
iteration might be very short and EBUSY can happen many times in a row.
Instead, SF_NODISKIO is simply disabled for one call once the limit is
reached.
With this change, sendfile(SF_NODISKIO) is now used automatically as long as
sendfile() is enabled, and no longer requires "aio on;".
author | Maxim Dounin <mdounin@mdounin.ru> |
---|---|
date | Mon, 27 Dec 2021 19:48:33 +0300 |
parents | d620f497c50f |
children |
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/* * Copyright (C) Igor Sysoev * Copyright (C) Nginx, Inc. */ #ifndef _NGX_TIME_H_INCLUDED_ #define _NGX_TIME_H_INCLUDED_ #include <ngx_config.h> #include <ngx_core.h> typedef ngx_rbtree_key_t ngx_msec_t; typedef ngx_rbtree_key_int_t ngx_msec_int_t; typedef struct tm ngx_tm_t; #define ngx_tm_sec tm_sec #define ngx_tm_min tm_min #define ngx_tm_hour tm_hour #define ngx_tm_mday tm_mday #define ngx_tm_mon tm_mon #define ngx_tm_year tm_year #define ngx_tm_wday tm_wday #define ngx_tm_isdst tm_isdst #define ngx_tm_sec_t int #define ngx_tm_min_t int #define ngx_tm_hour_t int #define ngx_tm_mday_t int #define ngx_tm_mon_t int #define ngx_tm_year_t int #define ngx_tm_wday_t int #if (NGX_HAVE_GMTOFF) #define ngx_tm_gmtoff tm_gmtoff #define ngx_tm_zone tm_zone #endif #if (NGX_SOLARIS) #define ngx_timezone(isdst) (- (isdst ? altzone : timezone) / 60) #else #define ngx_timezone(isdst) (- (isdst ? timezone + 3600 : timezone) / 60) #endif void ngx_timezone_update(void); void ngx_localtime(time_t s, ngx_tm_t *tm); void ngx_libc_localtime(time_t s, struct tm *tm); void ngx_libc_gmtime(time_t s, struct tm *tm); #define ngx_gettimeofday(tp) (void) gettimeofday(tp, NULL); #define ngx_msleep(ms) (void) usleep(ms * 1000) #define ngx_sleep(s) (void) sleep(s) #endif /* _NGX_TIME_H_INCLUDED_ */