>>> On 1/4/2010 at  3:53 PM, Stewart Thomas J <stewartthom...@johndeere.com> 
>>> wrote:

> Regarding jiffies, we found this earlier:
> http://linux.die.net/man/7/time
> "On x86 the situation is as follows: on kernels up to and including 2.4.x, 
> HZ was 100, giving a jiffy value of 0.01 seconds; starting with 2.6.0, HZ was 
> raised to 1000, giving a jiffy of 0.001 seconds; since kernel 2.6.13, the HZ 
> value is a kernel configuration parameter and can be 100, 250 (the default) 
> or 1000, yielding a jiffies value of, respectively, 0.01, 0.004, or 0.001 
> seconds. " 
> 
> -- anyone know if that holds the same on z hardware implementations?

Check the value in /proc/sys/kernel/HZ on a particular system to make sure.  On 
my SLES10 SP3 guest, it's 100, and on my SLED10 SP3 laptop, it's 250.


Mark Post

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