On Fri, 2008-07-25 at 13:45 -0700, Adam Langley wrote:
I'd suggest that you write your server on the select() based system as-is for now. Then, when you need epoll you'll be sufficiently motivated to hack up the RTS to include it ;)
The problem with a select() based approach is that I can not have more than 1024 parallel connections on my Linux system, since this is the upper limit for the number of file descriptors in the FD_SET used by select(). Eg. # ulimit -n 10000 # <start client with many open connections> client: internal error: awaitEvent: descriptor out of range (GHC version 6.8.3 for i386_unknown_linux) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug Aborted This is caused by having more file descriptors than FD_SETSIZE (which is 1024) on my system. So clearly select() doesn't scale to the numbers I need :-( Thanks, Levi