lkml.org 
[lkml]   [2001]   [Oct]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Which is better at vm, and why? 2.2 or 2.4
On Sat, Oct 13, 2001 at 01:48:05PM -0400, Mark Hahn wrote:
> > Now, the great kernel hacker, ac, said that 2.2 is better at vm in low
> > memory situations than 2.4 is. Why is this? Why hasnt someone fixed the 2.4
> > code?
>
> not to slight TGKH AC, but he's also the 2.2 maintainer; perhaps there's
> some paternal protectiveness there ;)
>
> my test for VM is to compile a kernel on my crappy old BP6 with mem=64m;
> I use a dedicated partition with a fresh ext2, unpack the same source tree,
> make -j2 7 times, drop 1 outlier, and average:
>
> 2.2.19: 584.462user 57.492system 385.112elapsed 166.5%CPU
> 2.4.12: 582.318user 40.535system 337.093elapsed 184.5%CPU
>

Is this:
> 2.2.19:
584.462user
57.492system
385.112elapsed
166.5%CPU

> 2.4.12:
582.318user
40.535system
337.093elapsed
184.5%CPU

???

If so, then 2.4.12 won on user, system and elapsed. What's with the CPU
percentage? Are you on a dual system?

> notice that elapsed is noticably faster even than the 1+17 second
> benefit to user and system times. Rik's VM seems to be slightly

No, that's Andrea's VM (since 2.4.10pre11). Rik's is in 2.4.xx-ac.

Mike
-
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 13:08    [W:0.064 / U:0.096 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site