[LARTC] What value to set to Hz ?

[LARTC] What value to set to Hz ?

[raptor]

hi,

I was always setting HZ to 1000 when I compiled QoS kernel ... i knowed it shedules tasks more often and that was my presumtion that this way qos channel polices will be enforced better (of cource will have greater sheduling overhead) .... but now u can get much better picture if u read this :

http://kerneltrap.org/node.php?idF4

hope it is interesting

raptor
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Re: [LARTC] What value to set to Hz ?

[Pedro Larroy]

On Wed, Oct 16, 2002 at 12:17:39PM -0400, raptor wrote:
> hi,
> 
> I was always setting HZ to 1000 when I compiled QoS kernel ... i knowed it shedules tasks more often and that was my presumtion that this way qos channel polices will be enforced better (of cource will have greater sheduling overhead) .... but now u can get much better picture if u read this :
> 
> http://kerneltrap.org/node.php?idF4
> 
> hope it is interesting
> 
> raptor
> _______________________________________________
> LARTC mailing list / LARTC@mailman.ds9a.nl
> http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/

It's better to change /usr/src/linux/include/net/pkt_sched.h
PSCHED_CLOCK_SOURCE to PSCHED_CPU if you have a cpu with timestamp
counter (TSC) that will give you Mhz timer granularity.

Regards.

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