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Re: [Qemu-devel] [Qemu-discuss] The difference between qemu-kvm-1.2.0 &

From: Fam Zheng
Subject: Re: [Qemu-devel] [Qemu-discuss] The difference between qemu-kvm-1.2.0 & qemu-1.5.1
Date: Tue, 23 Jul 2013 08:43:20 +0800
User-agent: Mutt/1.5.21 (2010-09-15)

On Mon, 07/22 13:51, Yaodong Yang wrote:
> Hi everyone,
> Previously, I used the qemu-kvm-1.2.0 from 
> (http://www.linux-kvm.org/page/Downloads), and it worked well in my ubuntu 
> server. Later, I found that some of the implementation(qemu-kvm-1.2.0) is out 
> of date, so that I changed to qemu-1.5.1 (http://wiki.qemu.org/Download). I 
> found that installing a guest ubuntu vm (qcow2 backup images) in qemu-1.5.1 
> is much slower than that in qemu-kvm-1.2.0. 
> So could someone tell me the differences between them? particularly why the 
> qemu-1.5.1 is slower than the qemu-kvm-1.2.0.  
> I would like to implement something in the io path. My platform is a x86 
> 64bit server, and my host os is ubuntu 12.04 desktop, 64 bits.

Are you using KVM? If not, please use --enable-kvm to compile QEMU with
kvm support and run with '-enable-kvm'.

What's your command to run it?


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