[lkml]   [2009]   [May]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH] x86: Reduce the default HZ value
On Thu, 7 May 2009 14:12:15 -0400 (EDT)
Christoph Lameter <> 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.


 \ /
  Last update: 2009-05-07 21:57    [W:0.185 / U:4.344 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site