RE: [Xen-users] How to raise HZ to 1000 properly?

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> I've been redoing my Asterisk domU, and decided to do it 
> correctly this time. This time I'm using zaptel and ztdummy, 
> and that requires HZ to be set to 1000. I've managed to do 
> this, and Asterisk works great with ztdummy, but I don't 
> think I did it correctly. I've changed 
> include/asm-xen/asm/param.h thusly:
> 
> #ifdef __KERNEL__
> # define HZ             1000            /* Internal kernel 
> timer frequency */
> # define USER_HZ        1000            /* .. some user interfaces are
> in "ticks" */
> # define CLOCKS_PER_SEC         (USER_HZ)       /* like times() */
> #endif
> 
> #ifndef HZ
> #define HZ 1000
> #endif
> 
> And like I said, it works. But my bogomips are now 25100.28, 
> whereas my other domU's are more like 2300-2400.
> 
> What's the right way to do this?

To get the acuracy you need you'll need to adjust the parameter in
xen/include/asm-x86/config.h too

Ian

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