1a5b8ef85SBrad FitzpatrickIdeally, you want to make a static binary, otherwise the dynamic 2a5b8ef85SBrad Fitzpatricklinker pollutes your address space with shared libs right in the 37917af40SBrad Fitzpatrickmiddle. (NOTE: actually, this shouldn't matter so much anymore, now 47917af40SBrad Fitzpatrickthat we only allocate huge, fixed-size slabs) 5a5b8ef85SBrad Fitzpatrick 6a5b8ef85SBrad FitzpatrickMake sure your libevent has epoll (Linux) or kqueue (BSD) support. 7a5b8ef85SBrad FitzpatrickUsing poll or select only is slow, and works for testing, but 87917af40SBrad Fitzpatrickshouldn't be used for high-traffic memcache installations. 9a5b8ef85SBrad Fitzpatrick 10*2c35a3fdSBrad FitzpatrickTo build libevent with epoll on Linux, you need two things. First, 11*2c35a3fdSBrad Fitzpatrickyou need /usr/include/sys/epoll.h . To get it, you can install the 12*2c35a3fdSBrad Fitzpatrickuserspace epoll library, epoll-lib. The link to the latest version 13*2c35a3fdSBrad Fitzpatrickis buried inside 14*2c35a3fdSBrad Fitzpatrickhttp://www.xmailserver.org/linux-patches/nio-improve.html ; currently 15*2c35a3fdSBrad Fitzpatrickit's http://www.xmailserver.org/linux-patches/epoll-lib-0.9.tar.gz . 16*2c35a3fdSBrad FitzpatrickIf you're having any trouble building/installing it, you can just copy 17*2c35a3fdSBrad Fitzpatrickepoll.h from that tarball to /usr/include/sys as that's the only thing 18*2c35a3fdSBrad Fitzpatrickfrom there that libevent really needs. 19*2c35a3fdSBrad Fitzpatrick 20*2c35a3fdSBrad FitzpatrickSecondly, you need to declare syscall numbers of epoll syscalls, so 21*2c35a3fdSBrad Fitzpatricklibevent can use them. Put these declarations somewhere 22*2c35a3fdSBrad Fitzpatrickinside <sys/epoll.h>: 23a5b8ef85SBrad Fitzpatrick 24a5b8ef85SBrad Fitzpatrick#define __NR_epoll_create 254 25a5b8ef85SBrad Fitzpatrick#define __NR_epoll_ctl 255 26a5b8ef85SBrad Fitzpatrick#define __NR_epoll_wait 256 27a5b8ef85SBrad Fitzpatrick 28*2c35a3fdSBrad FitzpatrickAfter this you should be able to build libevent with epoll support. 29*2c35a3fdSBrad FitzpatrickOnce you build/install libevent, you don't need <sys/epoll.h> to 30*2c35a3fdSBrad Fitzpatrickcompile memcache or link it against libevent. Don't forget that for epoll 31*2c35a3fdSBrad Fitzpatricksupport to actually work at runtime you need to use a kernel with epoll 32*2c35a3fdSBrad Fitzpatricksupport patch applied, as explained in the README file. 33a5b8ef85SBrad Fitzpatrick 34a5b8ef85SBrad FitzpatrickBSD users are luckier, and will get kqueue support by default. 35a5b8ef85SBrad Fitzpatrick 36a5b8ef85SBrad Fitzpatrick 37a5b8ef85SBrad Fitzpatrick 38