lkml.org 
[lkml]   [2004]   [Nov]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: page fault scalability patch V11 [0/7]: overview
On Fri, Nov 19, 2004 at 11:42:39AM -0800, Christoph Lameter wrote:
> Note that I have posted two other approaches of dealing with the rss problem:
>
> A. make_rss_atomic. The earlier releases contained that patch but then another
> variable (such as anon_rss) was introduced that would have required additional
> atomic operations. Atomic rss operations are also causing slowdowns on
> machines with a high number of cpus due to memory contention.
>
> B. remove_rss. Replace rss with a periodic scan over the vm to determine
> rss and additional numbers. This was also discussed on linux-mm and linux-ia64.
> The scans while displaying /proc data were undesirable.

Can you run a comparison benchmark between atomic rss and anon_rss and
the sloppy rss with the rss and anon_rss in seperate cachelines. I am not
sure that it is important to seperate the two into seperate lines, just
rss and anon_rss from the lock and sema.

If I have the time over the weekend, I might try this myself. If not, can
you give it a try.

Thanks,
Robin
-
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    [W:0.359 / U:1.120 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site