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Re: [Qemu-devel] Re: Extremely slow graphic updates
From: |
Stefan Weil |
Subject: |
Re: [Qemu-devel] Re: Extremely slow graphic updates |
Date: |
Tue, 20 Jan 2009 22:29:10 +0100 |
User-agent: |
Mozilla-Thunderbird 2.0.0.19 (X11/20090103) |
Paul Brook schrieb:
>> 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.
>
>
I see a similar effect with the first serial console: booting a mips malta
linux kernel with debug output and a serial console took 15 s (up to
start of devfs),
now it takes 140 s with local SDL (estimated baud rate 600 or 1200 baud).
The serial console is only slow when it is selected.
VNC output or -nographic output is still fast.
Regards
Stefan Weil
- 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, 2009/01/20
- Re : [Qemu-devel] Re: Extremely slow graphic updates, Sylvain Petreolle, 2009/01/20
- Re: [Qemu-devel] Re: Extremely slow graphic updates,
Stefan Weil <=
- 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