lkml.org 
[lkml]   [2004]   [Feb]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] 2.6.1 Hyperthread smart "nice" 2

* Con Kolivas <kernel@kolivas.org> wrote:

> At least it appears Intel are well aware of the priority problem, but
> full priority support across logical cores is not likely. However I
> guess these new instructions are probably enough to work with if
> someone can do the coding.

these instructions can be used in the idle=poll code instead of rep-nop.
This way idle-wakeup can be done via the memory bus in essence, and the
idle threads wont waste CPU time. (right now idle=poll wastes lots of
cycles on HT boxes and is thus unusable.)

for lowprio tasks they are of little use, unless you modify gcc to
sprinkle mwait yields all around the 'lowprio code' - not very practical
i think.

Ingo
-
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 14:00    [W:0.065 / U:1.544 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site