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Re: [ts-7000] kernel & tick

To:
Subject: Re: [ts-7000] kernel & tick
From: Jim Jackson <>
Date: Sun, 1 Oct 2006 22:48:39 +0100 (BST)
As you have partly discovered there are 2 bits to this....

On Fri, 29 Sep 2006, I R wrote:

> it looks like, that I've found solution.
>
>   1. Don't change HZ value.

Yes do change HZ. That way any part of the kernel that needs to know what
the number of timer interrupts per sec is will get the right value.
also the right value will be returned for the relevant sysconf system call
(I think!).

>   2. Change presets for Timer1 in 
> /tools/linux24/include/asm-arm/arch-ep93xx/time.h file (default value 5085).

This does the actual work on this device. Maybe the code _should_
calculate the values to use from the above defined HZ value - as it is in
the i386 version - but it doesn't. It's left as an excercise for the
programmer :-)

>   Is it the right way to do ?
>
> pofikus <> wrote:  how to change a kernel's tick frequency?
> simple changing of HZ in
> "/tools/linux24/include/asm-arm/arch-ep93xx/param.h"
> & "/tools/linux24/include/asm-arm/param.h"
> does not work.
>
> regards.
>
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> Yahoo! Groups Links
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