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From: | Anthony Liguori |
Subject: | Re: [Qemu-devel] qemu-kvm faster that qemu? |
Date: | Wed, 25 Aug 2010 14:48:50 -0500 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.11) Gecko/20100713 Lightning/1.0b1 Thunderbird/3.0.6 |
On 08/25/2010 02:37 PM, walt wrote:
Hi qemu team, I just discovered that qemu now offers kvm support, so I decided to compare it to qemu-kvm. I'm running the latest git versions of both programs on an AMD64 host running the latest kernel from Linus.git. The guest is Windows 7 on a qcow2 disk image and one kvm64 cpu. Using the same qcow2 image for both qemu and qemu-kvm, I find that qemu-kvm boots to the Win7 login prompt in 25 seconds, but qemu with kvm enabled takes about 45 seconds.
make sure you build qemu with --enable-io-thread. Also, what's your full command line?
Regards, Anthony Liguori
Is this an expected outcome, or must I be doing something wrong with qemu? BTW, I tried reverting the qcow2 patch being discussed in another thread but it made no difference. Perhaps there's not much writing to disk during bootup? Thanks!
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