view auto/cc/owc @ 9138:a90f79792b5d

QUIC: optimized ACK delay. Previously ACK was not generated if max_ack_delay was not yet expired and the number of unacknowledged ack-eliciting packets was less than two, as allowed by RFC 9000 13.2.1-13.2.2. However this only makes sense to avoid sending ACK-only packets, as explained by the RFC: On the other hand, reducing the frequency of packets that carry only acknowledgments reduces packet transmission and processing cost at both endpoints. Now ACK is delayed only if output frame queue is empty. Otherwise ACK is sent immediately, which significantly improves QUIC performance with certain tests.
author Roman Arutyunyan <arut@nginx.com>
date Thu, 27 Jul 2023 16:37:17 +0400
parents b7b7f3a0cc28
children
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# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


# Open Watcom C 1.0, 1.2, 1.3

# optimizations

# maximize speed
CFLAGS="$CFLAGS -ot"
# reorder instructions for best pipeline usage
CFLAGS="$CFLAGS -op"
# inline intrinsic functions
CFLAGS="$CFLAGS -oi"
# inline expansion
CFLAGS="$CFLAGS -oe"
# disable stack checking calls
CFLAGS="$CFLAGS -s"

case $CPU in
    pentium)
        # optimize for Pentium and Athlon
        # register-based arguments passing conventions
        CPU_OPT="-5r"
        # stack-based arguments passing conventions
        #CPU_OPT="-5s"
    ;;

    pentiumpro)
        # optimize for Pentium Pro, Pentium II and Pentium III
        # register-based arguments passing conventions
        CPU_OPT="-6r"
        # stack-based arguments passing conventions
        #CPU_OPT="-6s"
    ;;
esac

CFLAGS="$CFLAGS $CPU_OPT"


# warnings

# maximum level
CFLAGS="$CFLAGS -wx"
#CFLAGS="$CFLAGS -w3"

# stop on warning
CFLAGS="$CFLAGS -we"

# built target is NT
CFLAGS="$CFLAGS -bt=nt"

# multithreaded
CFLAGS="$CFLAGS -bm"

# debug
CFLAGS="$CFLAGS -d2"

# quiet
CFLAGS="$CFLAGS -zq"

# Open Watcom C 1.2
have=NGX_HAVE_C99_VARIADIC_MACROS . auto/have


# the precompiled headers
#CORE_DEPS="$CORE_DEPS $NGX_OBJS/ngx_config.pch"
#NGX_PCH="$NGX_OBJS/ngx_config.pch"
#NGX_BUILD_PCH="-fhq=$NGX_OBJS/ngx_config.pch"
#NGX_USE_PCH="-fh=$NGX_OBJS/ngx_config.pch"


# the link flags, built target is NT GUI mode application
#CORE_LINK="$CORE_LINK -l=nt_win"


# the resource file
NGX_RCC="wrc \$(CORE_INCS) -fo=$NGX_OBJS/nginx.res "
NGX_RCC="$NGX_RCC $NGX_WIN32_RC $NGX_OBJS/nginx.exe"


ngx_include_opt="-i="
ngx_objout="-fo"
ngx_binout="-fe="
ngx_objext="obj"

ngx_regex_dirsep='\\'
ngx_dirsep="\\"

ngx_long_start=' '
ngx_long_end=' '
ngx_long_regex_cont=' \&\
	'
ngx_long_cont=' &
	'

ngx_regex_cont=' \&\
	'
ngx_cont=' &
	'
ngx_tab=' &
		'