Re: The "best" value of HZ

[Randy.Dunlap]

On Fri, 28 Oct 2005 01:18:41 +0200 Claudio Scordino wrote:

> Hi,
> 
>     during the last years there has been a lot of discussion about the "best" 
> value of HZ... On i386 was 100, then became 1000, and finally was set to 250.
> I'm thinking to do an evaluation of this parameter using different 
> architectures.
> 
> Has anybody thought to give the possibility to modify the value of HZ at boot 
> time instead of at compile time ? This would allow to easily test different 
> values on different machines and create a table containing the "best" value 
> for each architecture...  At this moment, instead, we have to recompile the 
> kernel for each different value :(
> 
> Do you think there would be much work to do that ? 

Not a lot.  Could be useful.

> Do you think it would be a desired feature the knowledge of the best value for 
> each architecture with more precision ?

In this thread (around 2005-july-14)
Subject: Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt
there was some interest in that, and the beginnings of a patch.
But the dynamic tick patch seems to have sidelined this one.

---
~Randy
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