Off-Topic > Off-Topic - Tiny Tux's Corner

Instantly switch between TC and windows XP

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vinnie:
@maro: Using guestsaddiction you have more control over the resolution of the system (if I remember well even the automatic scaling based on vbox window size).
Automatically i think it's a useful option for similar needs.

curaga:

--- Quote from: Ulysses_ on March 11, 2011, 04:48:10 PM ---Off-topic question: With a VT-x/AMD-V cpu can you run a windows xp guest on a linux host at full speed?  What if the linux host is 64-bit and the xp guest is 32-bit?

--- End quote ---

There's always overhead, but with those extensions it's very close to full speed. Something like 97%.

A 64-bit host can run both 64 and 32-bit guests.

maro:

--- Quote from: Ulysses_ on March 11, 2011, 04:48:10 PM ---Off-topic question: With a VT-x/AMD-V cpu can you run a windows xp guest on a linux host at full speed?  What if the linux host is 64-bit and the xp guest is 32-bit?

--- End quote ---
Well, in principle I'd say YES, but currently there is no 64-bit extension for the VBox kernel modules in the repository (i.e. 'virtualbox-ose-modules-2.6.33.3-tinycore64.tcz'). According to this message it appears not to be an oversight, but I'm not sure what the problem might be (AFAIK those modules have been compiled for other 64-bit distributions).

So far I never saw the need to use MC 64-bit, but as I have now access to a notebook with a VT-x 64-bit CPU I gave it a try. I've only done a quick test using MC 3.5.1 (64-bit) as host OS and 'qemu.tcz' plus the 64-bit 'kvm' extension. This extension is a bit dated, but I had no immediate problem in running TC 3.5.1 (32-bit) as guest OS. Mind you I did not do a proper test, just a quick run of 'glxgears' IIRC. Another attempt with a 64-bit guest lead to a segfault, but I'm not sure that I can be bothered to look further into this.

curaga:
Qemu's default 64-bit cpu is a bit buggy, I use -cpu core2duo (or kvm64 when on kvm). kvm64 is the default when using kvm only in 0.14 or later, I believe.

gutmensch:
Btw. there's an interesting product from Citrix called XenClient, it's a bare metal hypervisor for special notebooks like Lenovo T series, Dell latitude, etc. It's by design maybe the closest approach to be able to switch easily between OS's (like Ctrl+1 for Windows, Ctrl+2 for Windows). It's based of course on Linux - and the guest support for Linux is non-existent, since they prefer to support Windows (guess because of the money involved) ;) When you have a XenServer running you can additionally synchronize VMs to and from your Notebook. All in all: Very interesting but not a good catch in performance to the day.

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