Fast UNIX Servers
Everyone ought start with Dan Kegel's classic site, "The C10K Problem" (still updated from time to time). Everything here is advanced followup material to Dan's excellent work.
- "sendfile(): fairly sexy (nothing to do with ECN)" on lkml
- "mmap() sendfile()" on freebsd-hackers
- "sharing memory map between processes (same parent)" on comp.unix.programmer
- "some mmap observations compared to Linux 2.6/OpenBSD" on freebsd-hackers