Messages in this thread |  | | Date | Mon, 4 Jan 1999 14:33:14 +0100 (CET) | | From | Andrea Arcangeli <> | | Subject | Re: Can and should the kernel HZ value be changed? |
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On Sat, 2 Jan 1999, Steve Bergman wrote:
> The default value of HZ is 100hz. Since the DEF_PRIORITY in sched.h is 20, that
*snip*
> I'd like to find out more about it. Can anyone point me to more information or > perhaps a previous discussion of this subject?
I know one point for which it's not good to leave the timer irq "slow" on 32bit machines. All linux timeout (starting from select, nanosleep, poll, add_timer()) can be at most (~0UL>>1)-1 jiffies. If you increase the jiffy speed the final result is that you'll be able to handle a very little maximal timeout everywhere (if I remeber well going from 100 to 1000 you goes from month to days).
Andrea Arcangeli
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