[linux-audio-dev] Multithreaded programming for a poll model?

[Paul Davis]

>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.