@@ -7,13 +7,29 @@ Make sure your libevent has epoll (Linux) or kqueue (BSD) support. Using poll or select only is slow, and works for testing, but shouldn't be used for high-traffic memcache installations. -To build libevent with epoll on Linux, you need: +To build libevent with epoll on Linux, you need two things. First, +you need /usr/include/sys/epoll.h . To get it, you can install the +userspace epoll library, epoll-lib. The link to the latest version +is buried inside +http://www.xmailserver.org/linux-patches/nio-improve.html ; currently +it's http://www.xmailserver.org/linux-patches/epoll-lib-0.9.tar.gz . +If you're having any trouble building/installing it, you can just copy +epoll.h from that tarball to /usr/include/sys as that's the only thing +from there that libevent really needs. + +Secondly, you need to declare syscall numbers of epoll syscalls, so +libevent can use them. Put these declarations somewhere +inside <sys/epoll.h>: #define __NR_epoll_create 254 #define __NR_epoll_ctl 255 #define __NR_epoll_wait 256 -One okay (but not ideal) place to shove them is /usr/include/asm/unistd.h +After this you should be able to build libevent with epoll support. +Once you build/install libevent, you don't need <sys/epoll.h> to +compile memcache or link it against libevent. Don't forget that for epoll +support to actually work at runtime you need to use a kernel with epoll +support patch applied, as explained in the README file. BSD users are luckier, and will get kqueue support by default. BUILD bfebefb716288ad5490e38172856245e1544e504 Brad Fitzpatrick brad@danga.com http://github.com/steveyen/moxi/commit/2c35a3fddc589a4a047336aa05f290df44b2da8a 2c35a3fddc589a4a047336aa05f290df44b2da8a 2003-07-31T16:37:04-07:00 2003-07-31T16:37:04-07:00 better build instructions git-svn-id: http://code.sixapart.com/svn/memcached/trunk@81 b0b603af-a30f-0410-a34e-baf09ae79d0b 90292b55a4b4329a5e90df47bcb2b28a659f7e6b Brad Fitzpatrick brad@danga.com