This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
Home Products Support Community News


RE: [Xen-devel] qemu-dm performance

To: "McAfee, Tommie M" <Tommie.McAfee@xxxxxxxxxx>, "Steven Smith" <sos22-xen@xxxxxxxxxxxxx>
Subject: RE: [Xen-devel] qemu-dm performance
From: "Dugger, Donald D" <donald.d.dugger@xxxxxxxxx>
Date: Fri, 22 Sep 2006 12:34:37 -0700
Cc: Anthony Liguori <aliguori@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, sos22@xxxxxxxxxxxxx
Delivery-date: Fri, 22 Sep 2006 12:37:57 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: Acbds2gw3PzON3/KRf2ZDoSjDFluAgAwLjQAAAJK36A=
Thread-topic: [Xen-devel] qemu-dm performance
SLES uses TightVNC which has a problem with resize events (it doesn't
handle them).  If you replace the VNC client with RealVNC, which handles
resize events, this problem should go away.

Don Dugger
"Censeo Toto nos in Kansa esse decisse." - D. Gale
Ph: (303)443-3786 

>-----Original Message-----
>From: McAfee, Tommie M [mailto:Tommie.McAfee@xxxxxxxxxx] 
>Sent: Friday, September 22, 2006 12:58 PM
>To: Steven Smith
>Cc: Dugger, Donald D; Anthony Liguori; 
>xen-devel@xxxxxxxxxxxxxxxxxxx; sos22@xxxxxxxxxxxxx
>Subject: RE: [Xen-devel] qemu-dm performance
>Thanks a lot, this fix does reduce qemu overhead.
>Also, while testing I noticed a small bug with vncviewer using a
>sles9sp3 guest.  My initial attempt to view a guest causes vnc 
>to render
>a small window that doesn't respond to mouse movements.  I 
>have to close
>this window and then start the vncviewer again to get a resized and
>usable window.  I'm only seeing this on my first attempt to view the
>guest.  Any suggestions?
>Thx again for your help,
>T. McAfee
>Xen Testing
>-----Original Message-----
>From: Steven Smith [mailto:sos22@xxxxxxxxxxxxxxxx] On Behalf Of Steven
>Sent: Thursday, September 21, 2006 3:23 PM
>To: McAfee, Tommie M
>Cc: Dugger, Donald D; Anthony Liguori; xen-devel@xxxxxxxxxxxxxxxxxxx;
>Subject: Re: [Xen-devel] qemu-dm performance
>> >Deleting this function should result in a blank VGA screen for your
>> guest,
>> I not sure why but I'm not seeing this.  Here is what how I commented
>> out vram_dirty (as shown in gdb):
>> 1563        for (y = 0; y < s->vram_size; y += TARGET_PAGE_SIZE){
>> 1564            /*if (vram_dirty(s, y, TARGET_PAGE_SIZE))
>> 1565                
>cpu_physical_memory_set_dirty(s->vram_offset + y);
>> */
>> 1566        }
>It turns out that there was a bug a little later on which meant that
>the dirty bits were never actually cleared.  Fixing this seems to have
>fairly drastically reduced qemu overhead.  The fix is now present in

Xen-devel mailing list

<Prev in Thread] Current Thread [Next in Thread>