5 Jul
2011
5 Jul
'11
7:15 a.m.
I haven't measured it, but my educated guess is
that if you're
reading 16384 frames at a time from a FLAC file on current hardware,
then the difference between reading st_blksize sized blocks and
Uh, actually no. If one reads 4096, 2048, or 1024 frames the result is
the same -- 4 bytes less than st_blksize -- EVERY syscall. Try it. In
any case, I didn't optimize anything like that yet. It was a design
discussion. I was saying that's one more reason why it's good to have
the VIO layer, since there is no userspace cache.
non-st_blksize sized blocks will be absolutley
swamped, by disk
latencies, cache latencies, scheduling latencies and file
decoding overhead.
You seem to mix up latency and CPU load? A program can have low
latency, yet high(er than necessary) CPU load.
-- Dan