Messages in this thread | | | Date | Thu, 7 May 2009 20:53:57 +0100 | From | Alan Cox <> | Subject | Re: [PATCH] x86: Reduce the default HZ value |
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On Thu, 7 May 2009 14:12:15 -0400 (EDT) Christoph Lameter <cl@linux.com> wrote:
> To get back to the main point: I agree with Alok that the default HZ needs > to be as low as possible. The remaining justification is the load > balancing and possible context switching between multiple tasks contenting > for a processor. > > Is it enough if this occurs 100 times per second?
I would like to see evidence that it is, and by evidence I don't mean "our virtual machine manager runs better" but good evidence that it isn't affecting performance of any games, applications, video suites etc - because we know it did in the past.
Even then its pointlessly jumping up and down and changing stuff rather than fixing the real problem - which is jiffies.
Alan
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