lkml.org 
[lkml]   [2004]   [Dec]   [12]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateMon, 13 Dec 2004 00:43:31 +0100
FromAndrea Arcangeli <>
SubjectRe: dynamic-hz
On Mon, Dec 13, 2004 at 10:36:19AM +1100, Con Kolivas wrote:
> The performance benefit, if any, is often lost in noise during 
> benchmarks and when there, is less than 1%. So I was wondering if you 
> had some specific advantage in mind for this patch? Is there some 
> arch-specific advantage? I can certainly envision disadvantages to lower Hz.

My last number I've here is 1% for kernel compile. We're not talking
fancy desktop stuff here, we're talking about raw computing servers that
runs in userspace 99.9% of the time where the 1% loss is going to be
multiplied dozen or hundred of times. For those HZ=1000 is a pure
tangible disavantage.

For desktops 1% of cpu being lost is not an issue of course.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 14:08    [from the cache]
©2003-2008