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[Qemu-devel] Re: Extremely slow graphic updates
From: |
Paul Brook |
Subject: |
[Qemu-devel] Re: Extremely slow graphic updates |
Date: |
Tue, 20 Jan 2009 18:11:18 +0000 |
User-agent: |
KMail/1.9.9 |
> What is the quickest way for me to reproduce this problem?
> Have you seen this on ppc emulation only?
>
> I gather that the guest is in text mode. Have you seen this in graphical
> mode too? If yes, what was the resolution of the guest?
Steps to reproduce:
- Start qemu (doesn't matter which target or guest OS).
- Press c-a-2 to switch to the monitor.
- type "help<enter>"
- Watch the output slowly appear over the next 30 seconds
Running qemu over a forwarded X connection from a different machine (i.e.
ssh -X) suffers a marked slowdown. With this configuration the early x86 boot
stages are visibly much slower, in addition to the virtual console slowness
mentioned above.
The monitor virtual console, VGA text mode and the graphical mode used by the
knoppix bootloader[1] all show marked slowdown. It's unclear whether
truecolor modes are effected.
[1] I'm guessing this is either VGA 16 color or VESA 256 color mode.
> What is the resolution of your host? What X11 extensions are you using?
I have reproduced on a couple of different machines. Both are fairly standard
Debian sid installs, without any special Xorg config. One is x86, the other
x86-64, both 32-bit color depth.
One nVidia FX5200(nv)@800x600, one ATI HD3470(radeonhd)@1600x1200.
> Do you set SDL_VIDEODRIVER anywhere?
No.
Paul
- Re: [Qemu-devel] Re: Extremely slow graphic updates, (continued)
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Stefano Stabellini, 2009/01/20
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Lennart Sorensen, 2009/01/20
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Avi Kivity, 2009/01/20
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Samuel Thibault, 2009/01/20
- [Qemu-devel] Re: Extremely slow graphic updates, Stefano Stabellini, 2009/01/20
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Stefano Stabellini, 2009/01/20
- [Qemu-devel] Re: Extremely slow graphic updates,
Paul Brook <=
- Re : [Qemu-devel] Re: Extremely slow graphic updates, Sylvain Petreolle, 2009/01/20
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Stefan Weil, 2009/01/20
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Paul Brook, 2009/01/20
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Lennart Sorensen, 2009/01/21
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Stefano Stabellini, 2009/01/21
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Lennart Sorensen, 2009/01/21
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Lennart Sorensen, 2009/01/21
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Stefano Stabellini, 2009/01/21
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Paul Brook, 2009/01/21
- Re: [Qemu-devel] Re: Extremely slow graphic updates, Lennart Sorensen, 2009/01/22