Peter Terpstra wrote:
> linuxadmin@yandex.ru in
> <321338d7-2628-46f4-b2c3-47bcc27feb5b@e25g2000prg.googlegroups.com> :
>
>
>> The default kernel in opensuse has the value 250 HZ.
>> I know that all newer kernels allow to choose between 100, 250, 300,
>> 1000
>
> But i'm wandering what kind off difference it should make.
> What kind of response could we expect if the resolution would be set to 100
> or 1000? What does this CONFIG_HZ/resolution value do to a machine?
Higher values provide finer-grained time measurement to applications.
3D games benefit from this, since they have times that fire off multiple
times even before the monitor finished drawing a single frame.
Multimedia authoring applications are said to also benefit from this
(can someone explain why though?)
For a non-gaming PC, even 100Hz is good enough. On 32-bit systems it
doesn't matter much though, since the kernel is "tickless" by default
(that is the interrupt timer is effectively disabled when not needed).
On x86_64 tickless doesn't work (yet), so it matters a bit. The general
rule is, if you're playing modern 3D games, 1000Hz is better. If not,
choose 250 (or even 100 to save a bit of battery life on laptops).