[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] Re: [PATCH] Allow removing writable mappings from splintered page tables.


  • To: deshantm@xxxxxxxxx
  • From: "George Dunlap" <George.Dunlap@xxxxxxxxxxxxx>
  • Date: Mon, 15 Sep 2008 11:38:19 +0100
  • Cc: Gianluca Guida <gianluca.guida@xxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Mon, 15 Sep 2008 03:38:41 -0700
  • Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references:x-google-sender-auth; b=k3qh8JKpGU5xfY9lNizHWB0DdhxScpUaaIMdqNKst4jWqm2RCA9HxQXVAhiRXZg9Ix slMMZWR7owY8GX33guxo691xXe6wl37Sd4qd33TTeCEhF+wi1D6wkSWgLD27eNIuLgzR 7+hpUxSsE4yLEAcFkm6tWk8+jdVp6CyiFnHG4=
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

And your original numbers showed elapsed time to be 527s for KVM, so
now Xen is 8 seconds in the lead for HVM Linux. :-)  Thanks for the
help tracking this down!

If you have time, could you take another 30-second trace with the new
changes in, just for fun?  I'll take a quick look and see if there's
any other low-hanging fruit to grab.

 -George

On Fri, Sep 12, 2008 at 8:52 PM, Todd Deshane <deshantm@xxxxxxxxx> wrote:
> On Fri, Sep 12, 2008 at 1:14 PM, Gianluca Guida
> <gianluca.guida@xxxxxxxxxxxxx> wrote:
>>
>>
>> Todd Deshane wrote:
>>>>
>>>> Todd: Can you try try the linux-2.6.27 kernbench with the following
>>>> patch?
>>>> Also, are you using ioemu stub-domains? That should also give a
>>>> performance
>>>> gain.
>>>>
>>>
>>> Sure, I can give it a try. Should I also apply George's patch right?
>>
>
> Much faster, I'll also test on debian 4.0 for a regression test.
>
> Average Optimal load -j 4 Run (std deviation):
> Elapsed Time 519.056 (0.098387)
> User Time 426.226 (0.815555)
> System Time 92.716 (0.858563)
> Percent CPU 99 (0)
> Context Switches 99125.2 (71.3667)
> Sleeps 31199.2 (41.3062)
>
> I also want to look into the ioemu stub domains after reading more about them.
>
> I'll report the debian (older kernel results) when they come out.
>
> Todd
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
>

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel


 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.