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Sub filter: eliminate unnecessary buffering. Previously, when a buffer was processed by the sub filter, its final bytes could be buffered by the filter even if they don't match any pattern. This happened because the Boyer-Moore algorithm, employed by the sub filter since b9447fc457b4 (1.9.4), matches the last characters of patterns prior to checking other characters. If the last character is out of scope, initial bytes of a potential match are buffered until the last character is available. Now, after receiving a flush or recycled buffer, the filter performs additional checks to reduce the number of buffered bytes. The potential match is checked against the initial parts of all patterns. Non-matching bytes are not buffered. This improves processing of a chunked response from upstream by sending the entire chunks without buffering unless a partial match is found at the end of a chunk.
author Roman Arutyunyan <arut@nginx.com>
date Sat, 02 Jul 2016 15:59:53 +0300
parents 4dc8e7b62216
children ec2e6893caaa
line wrap: on
line source


# 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