lkml.org 
[lkml]   [2003]   [Oct]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.6.0-test9 - poor swap performance on low end machines
On Fri, 31 Oct 2003 23:37:34 +1100, Con Kolivas wrote:
> Yes it will show improvement, and I would like to hear how much given how

I've been sitting on my data because I was waiting for the missing
pieces from my test box, but here's a data point: For my test case,
your patch improves run time from 500 to 440 seconds.

> simple it is, but I agree with you. There is an intrinsic difference in the
> vm in 2.6 that makes it too hard for multiple running applications to have a

My (probably surprising to many) finding is that there _isn't_
an intrinsic difference which makes 2.6 suck. There are a number of
_separate_ issues, and they are only related in their contribution to
making 2.6 thrashing behavior abysmal.

What I'm trying to find out is whether the issues are intrinsic to
a change in some mechanisms (which typically means it's a price we
have to pay for other benefits) or if they are just problems with the
implementation. I had tracked down vm_swappiness as one problem, and
your solution shows that the implementation could indeed be improved
without touching the fundamental VM workings at all.

Roger
-
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 13:58    [W:0.048 / U:3.692 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site