Messages in this thread |  | | | Date | Thu, 7 May 2009 16:14:40 +0100 | | From | Alan Cox <> | | Subject | Re: [PATCH] x86: Reduce the default HZ value |
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On Thu, 7 May 2009 10:13:52 -0400 (EDT) Christoph Lameter <cl@linux.com> wrote:
> I think we need to reduce the general tick frequency to be as low as > possible. With high resolution timers the tick frequency is just the > frequency with which the timer interrupt disturbs a running application. > > Are there any benefits remaining from frequent timer interrupts? I would > think that 60 HZ would be sufficient.
50 works for various european video apps, 60 breaks, 60 works for various US video apps, 50 breaks. Now that may have changed with all the select stuff being hrtimer based (which I'd missed).
The tick also still appears to be involved in ntp and in cpu stats where a 50Hz tick would mean only 25Hz accuracy on CPU usage etc
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