[lkml]   [2004]   [Dec]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: dynamic-hz
On Sun, Dec 12, 2004 at 05:35:47PM +0100, Pavel Machek wrote:
> It certainly helps with singing capacitors... What is overhead of


> this?

The overhead is a single l1 cacheline in the paths manipulating HZ
(rather than having an immediate value hardcoded in the asm, it reads it
from a memory location not in the icache). Plus there are some
conversion routines in the USER_HZ usages. It's not a measurable
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 14:08    [W:0.135 / U:12.152 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site