IMHO :)
HZ defines the heart beat of the Linux system in terms of 'jiffies'.
Increasing HZ will increase the number of interrupts on the system (e.g.
timer interrupt) and hence might not be useful for typical desktops, since
handling these system interrupts will not leave much CPU time for
applications.
But for a server which usually does only one thing (e.g. enforcing QoS),
this increase in the interrupts should not be a problem.
I configure my servers with HZ=1024 regularly in include/net/pkt_sched.h
without any problems.
ciao,
Amit
On Mon, 24 Jun 2002, Martin Devera wrote:
> I change it regulary. I didn't experienced any problems - only
> lockups on slow systems which can't handle it.
> There should be no problem regarding the change.
> devik
>
> On Mon, 24 Jun 2002, Alexey Talikov wrote:
>
> > I can't answer you completely ( this question for kernel maintainers ) :(
> > But as I know this value used for IRQ (see arch/i386/kernel/irq.c)
> > different kernel timers (arch/i386/kernel/time.c) for SMP (multiprocessor)
> > in APIC functions ASPI functions almost in all drivers even in PCI bus
> > and ATM subsystem and many many other
> >
> > I have no idea about after-effects of change HZ !
> > I don't know about possibility to change this value only for traffic control
>functions !
> >
> > I think change this value for Ix86 architecture not so simple !
> >
> > If somebody have idea about this, share it with me !
> >
--
I'm an angel!!! Honest!
The horns are just there to hold the halo up straight.
^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^-^
Amit Kucheria
EECS Grad. Research Assistant
University of Kansas @ Lawrence
(R): +1-785-830-8521 ||| (C): +1-785-760-2871
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