Mercurial > hg > nginx
view auto/cc/icc @ 6536:f7849bfb6d21
Improved EPOLLRDHUP handling.
When it's known that the kernel supports EPOLLRDHUP, there is no need in
additional recv() call to get EOF or error when the flag is absent in the
event generated by the kernel. A special runtime test is done at startup
to detect if EPOLLRDHUP is actually supported by the kernel because
epoll_ctl() silently ignores unknown flags.
With this knowledge it's now possible to drop the "ready" flag for partial
read. Previously, the "ready" flag was kept until the recv() returned EOF
or error. In particular, this change allows the lingering close heuristics
(which relies on the "ready" flag state) to actually work on Linux, and not
wait for more data in most cases.
The "available" flag is now used in the read event with the semantics similar
to the corresponding counter in kqueue.
author | Valentin Bartenev <vbart@nginx.com> |
---|---|
date | Fri, 13 May 2016 17:19:23 +0300 |
parents | 293413010217 |
children | 9eefb38f0005 |
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# Copyright (C) Igor Sysoev # Copyright (C) Nginx, Inc. # Intel C++ compiler 7.1, 8.0, 8.1, 9.0, 11.1 NGX_ICC_VER=`$CC -V 2>&1 | grep 'Version' 2>&1 \ | sed -e 's/^.* Version \([^ ]*\) *Build.*$/\1/'` echo " + icc version: $NGX_ICC_VER" have=NGX_COMPILER value="\"Intel C Compiler $NGX_ICC_VER\"" . auto/define # optimizations CFLAGS="$CFLAGS -O" CORE_LINK="$CORE_LINK -opt_report_file=$NGX_OBJS/opt_report_file" case $CPU in pentium) # optimize for Pentium and Athlon CPU_OPT="-march=pentium" ;; pentiumpro) # optimize for Pentium Pro, Pentium II and Pentium III CPU_OPT="-mcpu=pentiumpro -march=pentiumpro" ;; pentium4) # optimize for Pentium 4, default CPU_OPT="-march=pentium4" ;; esac CFLAGS="$CFLAGS $CPU_OPT" if [ ".$PCRE_OPT" = "." ]; then PCRE_OPT="-O $CPU_OPT" fi if [ ".$MD5_OPT" = "." ]; then MD5_OPT="-O $CPU_OPT" fi if [ ".$ZLIB_OPT" = "." ]; then ZLIB_OPT="-O $CPU_OPT" fi # warnings CFLAGS="$CFLAGS -w2" # disable some warnings # invalid type conversion: "int" to "char *" CFLAGS="$CFLAGS -wd171" # argument is incompatible with corresponding format string conversion CFLAGS="$CFLAGS -wd181" # zero used for undefined preprocessing identifier CFLAGS="$CFLAGS -wd193" # the format string ends before this argument CFLAGS="$CFLAGS -wd268" # invalid format string conversion CFLAGS="$CFLAGS -wd269" # conversion from "long long" to "size_t" may lose significant bits CFLAGS="$CFLAGS -wd810" # parameter was never referenced CFLAGS="$CFLAGS -wd869" # attribute "unused" is only allowed in a function definition, warning on pTHX_ CFLAGS="$CFLAGS -wd1301" # STUB # enumerated type mixed with another type CFLAGS="$CFLAGS -wd188" # controlling expression is constant CFLAGS="$CFLAGS -wd279" # operands are evaluated in unspecified order CFLAGS="$CFLAGS -wd981" # external definition with no prior declaration CFLAGS="$CFLAGS -wd1418" # external declaration in primary source file CFLAGS="$CFLAGS -wd1419" case "$NGX_ICC_VER" in 9.*) # "cc" clobber ignored, warnings for Linux's htonl()/htons() CFLAGS="$CFLAGS -wd1469" # explicit conversion of a 64-bit integral type to a smaller # integral type CFLAGS="$CFLAGS -wd1683" # conversion from pointer to same-sized integral type, # warning on offsetof() CFLAGS="$CFLAGS -wd1684" # floating-point equality and inequality comparisons are unreliable, # warning on SvTRUE() CFLAGS="$CFLAGS -wd1572" ;; 8.*) # "cc" clobber ignored, warnings for Linux's htonl()/htons() CFLAGS="$CFLAGS -wd1469" # floating-point equality and inequality comparisons are unreliable, # warning on SvTRUE() CFLAGS="$CFLAGS -wd1572" ;; *) ;; esac # stop on warning CFLAGS="$CFLAGS -Werror" # debug CFLAGS="$CFLAGS -g"