Re: [Fwd: [linux-audio-dev] info point on linux hdr]

[Paul Barton-Davis]

>It depends.  Using more threads can lead to more conflicting IO seeks
>unless you can schedule enough IOs at once to give the scheduler a good
>chance to sort the IOs into decent-sized blocks.
>
>The objective should probably be to make sure that you have a few hundred
>KB of outstanding IO requests on each stream at any one time.  That can
>be done either with lots of threads submitting small IOs, or a few
>threads submitting large IOs.  Just adding a few more threads but 
>still performing small IOs will definitely not help.

Right now, I'm using 1 thread with 256kB IO requests, since 256kB
seems to give me optimal throughput. Obviously, measuring it is the
way to go, but do you have any sense of whether it would be worth
submitting 24 of these at more or less the same time, or 12, or just 1 ?

--p