Messages in this thread | | | Date | Wed, 6 Jan 1999 22:57:47 +0100 | From | Pavel Machek <> | Subject | Re: Can and should the kernel HZ value be changed? |
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Hi!
> > 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/ ;-).
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