[vbox-dev] vbox page fusion results

Liang Suilong liangsuilong at gmail.com
Tue Jun 8 08:30:14 PDT 2010


I have upgraded to VirtualBox-3.2.4. However, Page Fusion still causes
kernel oops ramdomly on my Fedora 12 x86_64 host. I try to run two Windows
32bit guests. One is Windows XP 32bit, the other is Windows Server 2003
32bit. They are the same.

Not long ago, I wrote a post to here but no one replied to me. Should I post
a bug report?

My post is here:
http://vbox.innotek.de/pipermail/vbox-dev/2010-May/002804.html

On Tue, Jun 8, 2010 at 6:56 AM, Geoff Nordli <geoffn at gnaa.net> wrote:

> I am seeing something that looks a lot better now J
>
>
>
> For a Windows Server 2008 R2 machine with 768MG of RAM, with nothing
> installed.
>
>
>
> host       RAM/VMM/Shared       75564 kB
>
> host       RAM/VMM/Shared:avg   75564 kB
>
> host       RAM/VMM/Shared:min   75564 kB
>
> host       RAM/VMM/Shared:max   75564 kB
>
> Win2008R2  Guest/RAM/Usage/Shared 75564 kB
>
> Win2008R2  Guest/RAM/Usage/Shared:avg 75564 kB
>
> Win2008R2  Guest/RAM/Usage/Shared:min 75564 kB
>
> Win2008R2  Guest/RAM/Usage/Shared:max 75564 kB
>
> Win2008R2-2 Guest/RAM/Usage/Shared 100608 kB
>
> Win2008R2-2 Guest/RAM/Usage/Shared:avg 100608 kB
>
> Win2008R2-2 Guest/RAM/Usage/Shared:min 100608 kB
>
> Win2008R2-2 Guest/RAM/Usage/Shared:max 100608 kB
>
>
>
>
>
> Can you explain why Wind2008R2 has only 75M of shared, and Win2008R2-2 is
> 100M?
>
>
>
> Interestingly when I look inside the VM, I am seeing the RAM usage as
> different on the two VMs:
>
>
>
> Win2008R2:  355MB
>
> Win2008R2-2:  277MB.
>
>
>
> Would the difference have anything to do with the page fusion?
>
>
>
> Since I am running a Windows host, would it also look for shared memory
> pages from the host OS?
>
>
>
> Thanks,
>
>
>
> Geoff
>
>
>
>
>
> *From:* vbox-dev-bounces at virtualbox.org [mailto:
> vbox-dev-bounces at virtualbox.org] *On Behalf Of *Sander van Leeuwen
> *Sent:* Monday, June 07, 2010 11:42 AM
> *To:* vbox-dev at virtualbox.org
> *Subject:* Re: [vbox-dev] vbox page fusion results
>
>
>
> Wait for 3.2.4. Previous versions didn't work well for 64 bit guests.
>
> On 7-6-2010 20:04, Geoff Nordli wrote:
>
> Hi.
>
>
>
> I didn’t get any results on the user list, probably because it is a pretty
> new function and not much non-dev use.
>
>
>
> Can you share any results on page fusion?
>
>
>
> Thanks,
>
>
>
> Geoff
>
>
>
> *From:* Geoff Nordli [mailto:geoffn at gnaa.net <geoffn at gnaa.net>]
> *Sent:* Friday, June 04, 2010 2:43 PM
> *To:* Community mailing list of VirtualBox users
> *Subject:* [VBox-users] vbox page fusion results
>
>
>
> Does anyone have any results on some page fusions tests?
>
>
>
> I created a clone of Windows Server 2008 R2 (64bit).  I am seeing only 2MB
> of shared memory.
>
>
>
> Object     Metric               Values
>
> ---------- -------------------- -----------------------------------
>
> Win2008R2-2 Guest/RAM/Usage/Total 785976 kB
>
> Win2008R2-2 Guest/RAM/Usage/Free 385540 kB
>
> Win2008R2-2 Guest/RAM/Usage/Shared 4 kB
>
> Win2008R2  Guest/RAM/Usage/Total 785976 kB
>
> Win2008R2  Guest/RAM/Usage/Free 408496 kB
>
> Win2008R2  Guest/RAM/Usage/Shared 2008 kB
>
>
>
> Maybe I don’t quite understand how this is supposed to work, but I would
> have thought we would see a much larger amount of shared memory.
>
>
>
> Are there any tricks that I am missing?
>
>
>
> Thanks,
>
>
>
> Geoff
>
>
>
>
>
>
>
>
>
>
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>
>
>
> --
>
> Kind regards / Mit freundlichen Gruessen / Met vriendelijke groet
>
>
>
> --
>
>
>
> Sun Microsystems GmbH        Sander van Leeuwen
>
> Werkstrasse 24               Senior Staff Engineer, VirtualBox
>
> 71384 Weinstadt, Germany     mailto:Sander.Vanleeuwen at sun.com <Sander.Vanleeuwen at sun.com>
>
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-- 
Fedora && Debian User, former Ubuntu User
My Page: http://www.liangsuilong.info
Fedora Project Contributor -- Packager && Ambassador
https://fedoraproject.org/wiki/User:Liangsuilong
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