lkml.org 
[lkml]   [2003]   [Dec]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Page Colouring (was: 2.6.0 Huge pages not working as expected)
Linus Torvalds <torvalds@osdl.org> writes:
>> Basically: prove me wrong. People have tried before. They have failed.
>> Maybe you'll succeed. I doubt it, but hey, I'm not stopping you.

On Sat, Dec 27, 2003 at 04:31:22PM -0700, Eric W. Biederman wrote:
> For anyone taking you up on this I'd like to suggest two possible
> directions.
> 1) Increasing PAGE_SIZE in the kernel.
> 2) Creating zones for the different colors. Zones were not
> implemented last time, this was tried.
> Both of those should be minimal impact to the complexity
> of the current kernel.
> I don't know where we will wind up but the performance variation's
> caused by cache conflicts in today's applications are real, and easily
> measurable. Giving the growing increase in performance difference
> between CPUs and memory Amdahl's Law shows this will only grow
> so I think this is worth looking at.

Increasing PAGE_SIZE in the kernel either (a) breaks ABI or (b) is
nontrivial. I suppose I should try some of the page coloring benchmarks
on pgcl (which preserves ABI).

-- wli
-
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 13:59    [W:0.065 / U:0.108 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site