view auto/cc/sunc @ 8805:96ae8e57b3dd

Avoid sending "Connection: keep-alive" when shutting down. When a worker process is shutting down, keepalive is not used: this is checked before the ngx_http_set_keepalive() call in ngx_http_finalize_connection(). Yet the "Connection: keep-alive" header was still sent, even if we know that the worker process is shutting down, potentially resulting in additional requests being sent to the connection which is going to be closed anyway. While clients are expected to be able to handle asynchronous close events (see ticket #1022), it is certainly possible to send the "Connection: close" header instead, informing the client that the connection is going to be closed and potentially saving some unneeded work. With this change, we additionally check for worker process shutdown just before sending response headers, and disable keepalive accordingly.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 11 Jan 2022 02:23:49 +0300
parents d8e8ced78e77
children
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# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


# Sun C 5.7 Patch 117837-04 2005/05/11    Sun Studio 10
# Sun C 5.8 2005/10/13                    Sun Studio 11
# Sun C 5.9 SunOS_i386 2007/05/03         Sun Studio 12
# Sun C 5.9 SunOS_sparc 2007/05/03
# Sun C 5.10 SunOS_i386 2009/06/03        Sun Studio 12.1
# Sun C 5.11 SunOS_i386 2010/08/13        Oracle Solaris Studio 12.2
# Sun C 5.12 SunOS_i386 2011/11/16        Oracle Solaris Studio 12.3
# Sun C 5.13 SunOS_i386 2014/10/20        Oracle Solaris Studio 12.4
# Sun C 5.14 SunOS_i386 2016/05/31        Oracle Developer Studio 12.5

NGX_SUNC_VER=`$CC -V 2>&1 | grep 'Sun C' 2>&1 \
                          | sed -e 's/^.* Sun C \(.*\)/\1/'`

echo " + Sun C version: $NGX_SUNC_VER"

have=NGX_COMPILER value="\"Sun C $NGX_SUNC_VER\"" . auto/define


cat << END > $NGX_AUTOTEST.c

int main(void) {
    printf("%d", __SUNPRO_C);
    return 0;
}

END

eval "$CC -o $NGX_AUTOTEST $NGX_AUTOTEST.c >> $NGX_ERR 2>&1"

if [ -x $NGX_AUTOTEST ]; then
    ngx_sunc_ver=`$NGX_AUTOTEST`
fi

rm -rf $NGX_AUTOTEST*

# 1424 == 0x590, Sun Studio 12

if [ "$ngx_sunc_ver" -ge 1424 ]; then
    ngx_sparc32="-m32"
    ngx_sparc64="-m64"
    ngx_amd64="-m64"

else
    ngx_sparc32="-xarch=v8plus"
    ngx_sparc64="-xarch=v9"
    ngx_amd64="-xarch=amd64"
fi

case "$NGX_MACHINE" in

    i86pc)
        NGX_AUX=" src/os/unix/ngx_sunpro_x86.il"
    ;;

    sun4u | sun4v)
        NGX_AUX=" src/os/unix/ngx_sunpro_sparc64.il"
    ;;

esac

MAIN_LINK=
MODULE_LINK="-G"


# optimizations

# 20736 == 0x5100, Sun Studio 12.1

if [ "$ngx_sunc_ver" -ge 20736 ]; then
    ngx_fast="-fast"

else
    # older versions had problems with bit-fields
    ngx_fast="-fast -xalias_level=any"
fi

IPO=-xipo
CFLAGS="$CFLAGS $ngx_fast $IPO"
CORE_LINK="$CORE_LINK $ngx_fast $IPO"


case $CPU in
    pentium)
        # optimize for Pentium and Athlon
        CPU_OPT="-xchip=pentium"
    ;;

    pentiumpro)
        # optimize for Pentium Pro, Pentium II
        CPU_OPT="-xchip=pentium_pro"
    ;;

    pentium3)
        # optimize for Pentium III
        CPU_OPT="-xchip=pentium3"
        #CPU_OPT="$CPU_OPT -xarch=sse"
        CPU_OPT="$CPU_OPT -xcache=16/32/4:256/32/4"
    ;;

    pentium4)
        # optimize for Pentium 4
        CPU_OPT="-xchip=pentium4"
        #CPU_OPT="$CPU_OPT -xarch=sse2"
        CPU_OPT="$CPU_OPT -xcache=8/64/4:256/128/8"
    ;;

    opteron)
        # optimize for Opteron
        CPU_OPT="-xchip=opteron"
        #CPU_OPT="$CPU_OPT -xarch=sse2"
        CPU_OPT="$CPU_OPT -xcache=64/64/2:1024/64/16"
    ;;

    sparc32)
        # build 32-bit UltraSparc binary
        CPU_OPT="$ngx_sparc32"
        CORE_LINK="$CORE_LINK $ngx_sparc32"
        CC_AUX_FLAGS="$CC_AUX_FLAGS $ngx_sparc32"
        NGX_CPU_CACHE_LINE=64
    ;;

    sparc64)
        # build 64-bit UltraSparc binary
        CPU_OPT="$ngx_sparc64"
        CORE_LINK="$CORE_LINK $ngx_sparc64"
        CC_AUX_FLAGS="$CC_AUX_FLAGS $ngx_sparc64"
        NGX_CPU_CACHE_LINE=64
    ;;

    amd64)
        # build 64-bit amd64 binary
        CPU_OPT="$ngx_amd64"
        CORE_LINK="$CORE_LINK $ngx_amd64"
        CC_AUX_FLAGS="$CC_AUX_FLAGS $ngx_amd64"
        NGX_AUX=" src/os/unix/ngx_sunpro_amd64.il"
        NGX_CPU_CACHE_LINE=64
    ;;

esac


CFLAGS="$CFLAGS $CPU_OPT"


if [ ".$PCRE_OPT" = "." ]; then
    PCRE_OPT="$ngx_fast $IPO $CPU_OPT"
fi

if [ ".$ZLIB_OPT" = "." ]; then
    ZLIB_OPT="$ngx_fast $IPO $CPU_OPT"
fi


# stop on warning
CFLAGS="$CFLAGS -errwarn=%all"

# debug
CFLAGS="$CFLAGS -g"