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RE: [Xen-devel] VMX status report. Xen: #17270 & Xen0: #488 --nonew issue


  • To: "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Li, Haicheng" <haicheng.li@xxxxxxxxx>
  • Date: Thu, 27 Mar 2008 10:36:17 +0800
  • Delivery-date: Wed, 26 Mar 2008 19:38:55 -0700
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AciNk+8gVPQ6UlY+Q3imHZ2zMFtzTQA1gPlyAC47q+AAAVK7zwAAexWBACGgLaA=
  • Thread-topic: [Xen-devel] VMX status report. Xen: #17270 & Xen0: #488 --nonew issue

Keir Fraser wrote:
> On 26/3/08 10:00, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> wrote:
> 
>>> Keir, we checked guest installation with rhel4u3 today, we compared
>>> c/s 17284 with c/s 16720, The result shows latest c/s with mmio
>>> emulation changes is a little bit faster than before on our test
>>> system with Xeon(r) processors, about 20 seconds faster.
>> 
>> That's pretty surprising! I found out that slowdown on my P4 system
>> for WinXP installation is about 15%, so not as bad as I thought. And
>> I can probably reclaim most of that performance loss.
>> 
>> I find it hard to explain a performance *win* though!
> 
> Actually, how long does the install take in total? 20 seconds is
> probably in the noise.
> 

About 7 ~ 8 min for a basic installation of rhel4u3, about 3~4% faster;
but from user side, 20 sec would be ignored.

-- haicheng

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