Subject: Re: [linux-audio-dev] Multithreaded programming for a poll model?
From: Paul Davis (paul_AT_linuxaudiosystems.com)
Date: Fri Jun 18 2004 - 03:43:50 EEST
>pipe()s here too. last time i benchmarked on an early 2.4 kernel, pipe
>and socketpair gave about the same timing figures, quicker than
>msgsnd/rcv. i don't remember the exact numbers but i remember being
>positively surprised.
from the whitepapers that IBM did, the linux FIFO appears to be just
about the fastest IPC mechanism outside of a microkernel. i am not
sure if even futexes are actually significantly faster.
>giving you an fd, both pipe and socketpair can be operated on within a
>poll() loop, which is quite handy sometimes. don't know if futexes
>will do that?
you can. it was added as an nth-round iteration of their
design. otherwise, it would be just another example of the crappy *nix
design where "waiting" is a different system call depending on what
you're waiting for.
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