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QEmu

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Apr. 25th, 2007 | 12:23 am

I wanted to comapare VMWare and QEMU, so after installing Q.app on my 2ghz core duo macbook pro, and regular qemu on a 1 ghz VIA VT-310dp, I grabbed a test qemu linux image and ran it on both systems.

Included in the test image was an old byte bench mark utility, and though I don't think I installed the kqemu accelerator properly, qemu on the via was about twice as fast as qemu on my mac. (Both systems are dual processor, and both had a little bit of other software eating some cpu).

Also though slow, the qemu utilities provide something similar to vmware's server products.
Qemudo looks promising. (Though vmware on the mak was about 5 to 10 times as fast as the non accelerated qemu on the via.
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Comments {4}

prof_reed

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from: prof_reed
date: Apr. 25th, 2007 02:38 pm (UTC)
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I think QEMU is still in that place where the fact that it works at all is amazing. Yet its hard to compete with other products that are cheap or free. Since VMware server is free (as in beer) and Parallels is cheap (less than $100) the eric raymond principle of development occurring because you scratch your own itch seems to belie rapid development. Most folks (outside zealots like us) don't distinguish between the two notions of "free" which would be a must for something like QEMU to get more support. Plus I don't think QEMU will run an unmodified windows kernel unless you have a vt processor, will it?

P.S. I'm hearing some discussion that Linux is no longer faster than windows and the cause is Python! Python scripts coupled with gui's have slowed down the environment so that it no longer leaves windows in the dust. What do you think?

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Diane Trout

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from: alienghic
date: Apr. 26th, 2007 04:32 am (UTC)
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Actually QEMU should run nearly anything, it'll just be slow without the kernel support. It's Xen that needs the virtualization chipset support in order to handle windows.

QEMU can actually emulate systems other than x86, if you need to run windows on a PPC mac, QEMU can help.

As for linux being slow, the area that its slowest is system boot up/shut down, which isn't really python, so much as the bunch of init scripts written in variety of scripting languages, with out good dependency/parallelization information.

I thought the only distro that was doing much python was Ubuntu? and that was mostly for configuration? (And Control Panel in windows always seems really slow to me.

I'd just launch top and see where my CPU time was being spent to answer that question.

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Diane Trout

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from: alienghic
date: May. 3rd, 2007 12:00 am (UTC)
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Follow up to your performance question.

Qt benchmark seems to suggest that perhaps the slowdown might be GTK. I might not have noticed a slowdown because Qt is just better.

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pouched fox

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from: pouchedfox
date: Apr. 26th, 2007 02:55 am (UTC)
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virtualbox is supposed to be faster than qemu though it uses it.
I've been using vmware to run xp inside linux, works well, but I'm not fond of non-opensource stuff on principle.

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