Re: VM changes added to performance patches for 2.4.19

[Marc-Christian Petersen <m.c.p@wolk-project.de>]

Hi Bill,

> ...
> against my current production kernel, 2.4.19-ac4. Machine in Athlon
> 1400MHz, 1GB RAM, 20+30GB WD disks.
> ...
> Then I did my nightly backup of a scanned documentation project, making a
> CD image from the scans, currently ~570MB. I was on ck3-aa, and I said
> "self, that seemed pretty fast!" So I rebooted cold and tried the mkisofs
> with both kernels, twice each.

>                         2.4.19-ac4              2.4.19-ck3-aa
> mkisofs 570MB           2:05                    1:14


with WOLK v3.6 and only ONE harddisk drive:

root@codeman:[/] # du -skh /home
605M    /home
root@codeman:[/] # find /home|wc -l
   7384
root@codeman:[/] # time mkisofs -o /delme.iso -allow-multidot -iso-level 3 -J 
-max-iso9660-filenames -U -R /home
...

real    1m12.872s
user    0m1.840s
sys     0m10.800s


with one big file:

root@codeman:[/] # du -skh /home/onebigfile.delme
620M    /home
root@codeman:[/] # time mkisofs -o /delme.iso -allow-multidot -iso-level 3 -J 
-max-iso9660-filenames -U -R /home/onebigfile.delme
...

real    0m35.676s
user    0m1.180s
sys     0m10.740s

:-)

Anyway, I also tested the patchset from Con, both, with -aa VM and -rmap VM 
and I must say, -rmap is much slower than -aa VM.


Testmashine: Celeron 800MHz
             256MB RAM
             1x Seagate 30GB running in UDMA4 (ATA66) mode
             Filesystem: ext3, data=ordered

I think with your mashine this could be a bit faster also ;)

-- 
Kind regards
        Marc-Christian Petersen

http://sourceforge.net/projects/wolk

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