> > The current HZ value of 100 is definitely archaic, best suitable for a
> > 386SX at 16MHz. The performance potential of increasing HZ with respect to
> > realtime and interactivite responsiveness is so huge, it simply cannot be
> > overlooked.
>
> could you elaborate why it makes a difference? what part of the kernel do
> you think causes the speedup?
Linux has some problems with scheduling:
If you access disks or do other similar tasks (login), and there's
background process running, you get scheduled at next timer tick - ie.
10ms later. This way, I was able to "feel" background while(1);
processes on my 486/16. I'm currently running some tests (find / in
fact), to see if this canbe measured in addition to 'felt'.
Pavel
-- I'm really pavel@atrey.karlin.mff.cuni.cz. Pavel Look at http://atrey.karlin.mff.cuni.cz/~pavel/ ;-).- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/