On 21/01/2008, Christian Boon <chris.boon@xxxxxxxxx> wrote: > Hello, > > For my ARM processor (PXA255) i use kernel 2.6.22 and a kernel HZ value > of 1000. [snip] > Am i doing something wrong here? Is this value converted to some sort of > userspace HZ? > I have tried it on x86 also and it gives the same behaviour. > In old kernels the HZ value (in both kernel- and user-space) was 100 without the ability to change this. When the kernel added the option of other HZ values this was implemented as kernel-space only and the HZ value exposed to user-space was fixed at 100. This was done to avoid breaking applications that assumed a fixed HZ of 100. So, while the kernel may tick at 100, 250, 1000 or some other HZ values (or even be tick less), user-space will always see HZ as being 100. -- Jesper Juhl <jesper.juhl@xxxxxxxxx> Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html Plain text mails only, please http://www.expita.com/nomime.html -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
