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view auto/os/freebsd @ 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 | 4dc8e7b62216 |
children | ec2e6893caaa |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. have=NGX_FREEBSD . auto/have_headers CORE_INCS="$UNIX_INCS" CORE_DEPS="$UNIX_DEPS $FREEBSD_DEPS" CORE_SRCS="$UNIX_SRCS $FREEBSD_SRCS" ngx_spacer=' ' # __FreeBSD_version and sysctl kern.osreldate are the best ways # to determine whether some capability exists and is safe to use. # __FreeBSD_version is used for the testing of the build environment. # sysctl kern.osreldate is used for the testing of the kernel capabilities. version=`grep "#define __FreeBSD_version" /usr/include/osreldate.h \ | sed -e 's/^.* \(.*\)$/\1/'` osreldate=`/sbin/sysctl -n kern.osreldate` # setproctitle() in libutil if [ \( $version -ge 500000 -a $version -lt 500012 \) \ -o $version -lt 410002 ] then echo " + setproctitle() in libutil" CORE_LIBS="$CORE_LIBS -lutil" NGX_SETPROCTITLE_LIB="-lutil" fi # sendfile if [ $osreldate -gt 300007 ]; then echo " + sendfile() found" have=NGX_HAVE_SENDFILE . auto/have CORE_SRCS="$CORE_SRCS $FREEBSD_SENDFILE_SRCS" fi if [ $NGX_FILE_AIO = YES ]; then if [ $osreldate -gt 502103 ]; then echo " + sendfile()'s SF_NODISKIO found" have=NGX_HAVE_AIO_SENDFILE . auto/have fi fi # POSIX semaphores # http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/127545 if [ $osreldate -ge 701106 ]; then echo " + POSIX semaphores should work" else have=NGX_HAVE_POSIX_SEM . auto/nohave fi # kqueue if [ \( $osreldate -lt 500000 -a $osreldate -ge 410000 \) \ -o $osreldate -ge 500011 ] then echo " + kqueue found" have=NGX_HAVE_KQUEUE . auto/have have=NGX_HAVE_CLEAR_EVENT . auto/have EVENT_MODULES="$EVENT_MODULES $KQUEUE_MODULE" CORE_SRCS="$CORE_SRCS $KQUEUE_SRCS" EVENT_FOUND=YES fi NGX_KQUEUE_CHECKED=YES # kqueue's NOTE_LOWAT if [ \( $version -lt 500000 -a $version -ge 430000 \) \ -o $version -ge 500018 ] then echo " + kqueue's NOTE_LOWAT found" have=NGX_HAVE_LOWAT_EVENT . auto/have fi # kqueue's EVFILT_TIMER if [ \( $version -lt 500000 -a $version -ge 440001 \) \ -o $version -ge 500023 ] then echo " + kqueue's EVFILT_TIMER found" have=NGX_HAVE_TIMER_EVENT . auto/have fi # cpuset_setaffinity() if [ $version -ge 701000 ]; then echo " + cpuset_setaffinity() found" have=NGX_HAVE_CPUSET_SETAFFINITY . auto/have fi