lkml.org 
[lkml]   [1999]   [Jan]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Can and should the kernel HZ value be changed?
Date
On 3 Jan 1999, Florian Lohoff wrote:

> This shouldnt be true for CONFIG_I386 or something. I agree for
> current desktop systems like K6/>=200 and other compareable
> processors. This should maybe be bound to the CPU selection and/or
> seperatly configurable.

With respect to the ix86:

The current HZ value of 100 is definitely archaic, best suitable for a
386SX at 16MHz. The performance potential of increasing HZ with respect to
realtime and interactivite responsiveness is so huge, it simply cannot be
overlooked.

I have a patch for the user RTC upper limit, making it somewhat
proportional to BogoMips. This is of course pretty vague, but works well
enough in practice. Perhaps a similar method could be used for HZ? A
selection based on processor type would also work, I guess (something along
100 for i386, 256 for i486, 512 for i586, 1024 for i686).

How difficult is it to fix the uptime wraparound issue by use of a long
long?

Egil
--
Email: egil@kvaleberg.no Voice: +47 22523641, 92022870 Fax: +47 22525899
Snail: Egil Kvaleberg, Husebybakken 14A, 0379 Oslo, Norway
URL: http://www.kvaleberg.no/


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:49    [W:0.121 / U:0.132 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site