[Qemu-devel] qemu varying performance

[Qemu-devel] qemu varying performance

[Lee]

Hello,

Im not sure if this is a bug, but I wanted to mention it anyways.

My host computer is running the 2.4.24 kernel with smp support, xfree86,
and openbox for the window manager (16 virtual desktops).

when i am on the desktop that qemu is running on, the performance seems
normal to me.

then i will switch to a different desktop and work there for a while
(expecting that qemu will continue processing on the other desktop).

then after a while i will go back to the qemu virtual desktop and it seems
that qemu will then pick up where it left off at (either there or a little
bit after that point) and run again at normal speed.

this seems like qemu does a MAJOR slow down when it is not being displayed
on the active desktop.

has anyone else noticed this behavior?



-- 
Lee
linuxtwidler@gmail.com

Re: [Qemu-devel] qemu varying performance

[Johannes Schindelin]

Hi,

On Tue, 25 Jan 2005, Lee wrote:

> this seems like qemu does a MAJOR slow down when it is not being displayed
> on the active desktop.

I noticed something like this, too. I think the reason lies within SDL.
Could you try the same programs, but with rfb as displaying end (just
close the viewer for a while and check if QEmu was lower, too)?

Ciao,
Dscho

Re: [Qemu-devel] qemu varying performance

[Daniel Egger]

[-- Attachment #1: Type: text/plain, Size: 810 bytes --]

On 26.01.2005, at 14:34, Johannes Schindelin wrote:

> I noticed something like this, too. I think the reason lies within SDL.
> Could you try the same programs, but with rfb as displaying end (just
> close the viewer for a while and check if QEmu was lower, too)?

The rfb patch (version 9 that is) does not apply cleanly against
current CVS; it clashes badly with the new keyboard stuff. Also it
does not compile cleanly on Debian (sarge) because some of the
elements of IIRC the rfbServer structure have a different name.

After resolving the issues it segfaults when starting up with -vnc
because of the keyboard stuff and I comment that part out it cannot
allocate an rfbServer structure (i.e. the initialisation call
returns 0) and I haven't had the time yet to figure out why....

Servus,
       Daniel

[-- Attachment #2: This is a digitally signed message part --]
[-- Type: application/pgp-signature, Size: 478 bytes --]

[Qemu-devel] Re: qemu varying performance

[Anand Kumria]

On Tue, 25 Jan 2005 20:49:22 -0600, Lee wrote:

> 
> Hello,
> 
> Im not sure if this is a bug, but I wanted to mention it anyways.
> 
> My host computer is running the 2.4.24 kernel with smp support, xfree86,
> and openbox for the window manager (16 virtual desktops).
> 
> when i am on the desktop that qemu is running on, the performance seems
> normal to me.
> 
> then i will switch to a different desktop and work there for a while
> (expecting that qemu will continue processing on the other desktop).
> 
> then after a while i will go back to the qemu virtual desktop and it
> seems that qemu will then pick up where it left off at (either there or
> a little bit after that point) and run again at normal speed.
> 
> this seems like qemu does a MAJOR slow down when it is not being
> displayed on the active desktop.
> 
> has anyone else noticed this behavior?

Yes, although I also experience the same problem within the same desktop. 
I've noticed that as soon as qemu captures either the mouse or the
keyboard it speeds up again.

Anand

[Qemu-devel] unhandled exception...

[Doug Stanley]

[-- Attachment #1: Type: text/plain, Size: 1506 bytes --]

Hi, I've been having some trouble running one particular
application under qemu, and it's basically the sole reason
I have for trying to use qemu (well at work atleast).

I don't know if any of you are familiar with the application
called FileMaker (and honestly I hope none of you ever have
to become familiar with it...or even look upon it...).

Anyways, so far, I've had weird errors trying to run FileMaker
under qemu with win2k, winnt4, and linux as the guest os's (using
wine under linux of course).

Basically, when running it under winnt4 and win2k, it crashes
upon startup with no error message. When running it through
wine under linux, I get a wine error message about an unhandled
exception or something.

This app starts up fine on real hardware...so I'm guessing it's
something that qemu is doing (or not doing).

Anyone have any clues as to what may cause it to get an un handled
exceptoion? I have had luck running qemu in a win95 guest, but
FileMaker doesn't support the one and only feature I need it to
on win95 (only win98 and up...go figure).

I haven't been able to test win98 or winxp since we don't have
any spare liscences for those laying around here and so it didn't
make sense to waste my time testing those os's to see if they work.

So, if anyone hase any clues as to something I can try, please let
me know.

By the way, I'm running all of these on a gentoo linux host using
the gentoo 2.6.9-gentoo-r13 kernel and the qemu 0.6.2 from the
gentoo portage tree...

Thanks,
Doug

[-- Attachment #2: dstanley.vcf --]
[-- Type: text/x-vcard, Size: 291 bytes --]

begin:vcard
fn:Douglas Stanley
n:Stanley;Douglas
org:Integrated Marketing Technologies;IT
adr:;;2945 Carquest Dr.;Brunswick;Ohio;44212;US
email;internet:dstanley@imtco.com
title:Systems Administrator
tel;work:330-220-6715
x-mozilla-html:FALSE
url:http://www.imtco.com
version:2.1
end:vcard