Mercurial > hg > nginx
view auto/cc/msvc @ 9086:f68fdb017141 quic
QUIC: optimized sending stream response.
When a stream is created by client, it's often the case that nginx will send
immediate response on that stream. An example is HTTP/3 request stream, which
in most cases quickly replies with at least HTTP headers.
QUIC stream init handlers are called from a posted event. Output QUIC
frames are also sent to client from a posted event, called the push event.
If the push event is posted before the stream init event, then output produced
by stream may trigger sending an extra UDP datagram. To address this, push
event is now re-posted when a new stream init event is posted.
An example is handling 0-RTT packets. Client typically sends an init packet
coalesced with a 0-RTT packet. Previously, nginx replied with a padded CRYPTO
datagram, followed by a 1-RTT stream reply datagram. Now CRYPTO and STREAM
packets are coalesced in one reply datagram, which saves bandwidth.
Other examples include coalescing 1-RTT first stream response, and
MAX_STREAMS/STREAM sent in response to ACK/STREAM.
author | Roman Arutyunyan <arut@nginx.com> |
---|---|
date | Mon, 03 Apr 2023 16:17:12 +0400 |
parents | 3c4d81ea1338 |
children | 314be1eba450 |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. # MSVC 6.0 SP2 cl 12.00 # MSVC Toolkit 2003 (7.1) cl 13.10 # MSVC 2005 Express Edition SP1 (8.0) cl 14.00 # MSVC 2008 Express Edition (9.0) cl 15.00 # MSVC 2010 (10.0) cl 16.00 # MSVC 2015 (14.0) cl 19.00 NGX_MSVC_VER=`$NGX_WINE $CC 2>&1 | grep 'C/C++.* [0-9][0-9]*\.[0-9]' 2>&1 \ | sed -e 's/^.* \([0-9][0-9]*\.[0-9].*\)/\1/'` echo " + cl version: $NGX_MSVC_VER" have=NGX_COMPILER value="\"cl $NGX_MSVC_VER\"" . auto/define ngx_msvc_ver=`echo $NGX_MSVC_VER | sed -e 's/^\([0-9]*\).*/\1/'` # detect x64 builds case "$NGX_MSVC_VER" in *x64) NGX_MACHINE=amd64 ;; *) NGX_MACHINE=i386 ;; esac # optimizations # maximize speed, equivalent to -Og -Oi -Ot -Oy -Ob2 -Gs -GF -Gy CFLAGS="$CFLAGS -O2" # enable global optimization #CFLAGS="$CFLAGS -Og" # enable intrinsic functions #CFLAGS="$CFLAGS -Oi" # disable inline expansion #CFLAGS="$CFLAGS -Ob0" # explicit inline expansion #CFLAGS="$CFLAGS -Ob1" # explicit and implicit inline expansion #CFLAGS="$CFLAGS -Ob2" # enable frame pointer omission #CFLAGS="$CFLAGS -Oy" # disable stack checking calls #CFLAGS="$CFLAGS -Gs" # pools strings as read/write #CFLAGS="$CFLAGS -Gf" # pools strings as read-only #CFLAGS="$CFLAGS -GF" case $CPU in pentium) # optimize for Pentium and Athlon CPU_OPT="-G5" ;; pentiumpro) # optimize for Pentium Pro, Pentium II and Pentium III CPU_OPT="-G6" ;; pentium4) # optimize for Pentium 4, MSVC 7 CPU_OPT="-G7" ;; esac # __cdecl, default, must be used with OpenSSL, md5 asm, and sha1 asm #CPU_OPT="$CPU_OPT -Gd" # __stdcall #CPU_OPT="$CPU_OPT -Gz" # __fastcall #CPU_OPT="$CPU_OPT -Gr" CFLAGS="$CFLAGS $CPU_OPT" # warnings CFLAGS="$CFLAGS -W4" # stop on warning CFLAGS="$CFLAGS -WX" # disable logo CFLAGS="$CFLAGS -nologo" # the link flags CORE_LINK="$CORE_LINK -link -verbose:lib" # link with libcmt.lib, multithreaded LIBC="-MT" # link with msvcrt.dll # however, MSVC Toolkit 2003 has no MSVCRT.LIB #LIBC="-MD" CFLAGS="$CFLAGS $LIBC" CORE_LIBS="$CORE_LIBS kernel32.lib user32.lib" # Win32 GUI mode application #CORE_LINK="$CORE_LINK -subsystem:windows -entry:mainCRTStartup" # debug # msvc under Wine issues # C1902: Program database manager mismatch; please check your installation if [ -z "$NGX_WINE" ]; then CFLAGS="$CFLAGS -Zi -Fd$NGX_OBJS/nginx.pdb" CORE_LINK="$CORE_LINK -debug" fi # MSVC 2005 supports C99 variadic macros if [ "$ngx_msvc_ver" -ge 14 ]; then have=NGX_HAVE_C99_VARIADIC_MACROS . auto/have fi # precompiled headers CORE_DEPS="$CORE_DEPS $NGX_OBJS/ngx_config.pch" CORE_LINK="$CORE_LINK $NGX_OBJS/ngx_pch.obj" NGX_PCH="$NGX_OBJS/ngx_config.pch" NGX_BUILD_PCH="-Ycngx_config.h -Fp$NGX_OBJS/ngx_config.pch" NGX_USE_PCH="-Yungx_config.h -Fp$NGX_OBJS/ngx_config.pch" # the resource file NGX_RES="$NGX_OBJS/nginx.res" NGX_RCC="rc -fo$NGX_RES \$(CORE_INCS) $NGX_WIN32_RC" CORE_LINK="$NGX_RES $CORE_LINK" # dynamic modules #MAIN_LINK="-link -def:$NGX_OBJS/nginx.def" #MODULE_LINK="-LD $NGX_OBJS/nginx.lib" ngx_pic_opt= ngx_objout="-Fo" ngx_binout="-Fe" ngx_objext="obj" ngx_long_start='@<< ' ngx_long_end='<<' ngx_long_regex_cont=' \ ' ngx_long_cont=' ' # MSVC understand / in path #ngx_regex_dirsep='\\' #ngx_dirsep="\\"