WARNING - OLD ARCHIVES

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/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

RE: [Xen-devel] Windows SMP

To: "'James Harper'" <james.harper@xxxxxxxxxxxxxxxx>, "'Dirk Utterback'" <dirk.utterback@xxxxxxxxx>
Subject: RE: [Xen-devel] Windows SMP
From: "Venefax" <venefax@xxxxxxxxx>
Date: Sun, 28 Dec 2008 21:59:44 -0500
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Sun, 28 Dec 2008 19:01:28 -0800
Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:from:to:cc:references :in-reply-to:subject:date:message-id:mime-version:content-type :content-transfer-encoding:x-mailer:thread-index:content-language; bh=mKvMTuTkm6Amhce4gGz49typxilZIbGVmK6uKD2dISs=; b=Uk0woR5vC0OeZ4Y/DSeNWLk5qvtqp/jVVT2BqPqh8bgE3IYaVNnLP8kpPIjv4wjadi /15a+HQDUSLDLofrPvUzFq2VfS+QN0G99s5Qq9xJ2A0nB2KdeR0e8WRCWIUejbJqqnFi Z1IN9lfWZHGBkrlzpYBBw7NhkESTz8uL2BJqo=
Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=from:to:cc:references:in-reply-to:subject:date:message-id :mime-version:content-type:content-transfer-encoding:x-mailer :thread-index:content-language; b=Hl6FeIIjl4I5mnamjDTec0dh9hDSdDDLrBfJLnqUIWr+AAnZ0KK0ZwOrCrWxREIqe8 shSBvfVl37/aS5VwyXkSMWTzjGenVHGGvE3LBfmGeGoTM29K3MFcmI13HHL9GtoMiTv8 dCjNm/HKB5OUPOjJNx/E487ojCMPPdmc7rxRU=
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <AEC6C66638C05B468B556EA548C1A77D0155010B@trantor>
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/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
References: <AclomJHRZPQAxvWTTHS1LTFPOLU6fA==> <036501c96898$959aaef0$c0d00cd0$@com><ec47b4a0812281839s58619d6ckaa0d9d92eac71ff6@xxxxxxxxxxxxxx> <03e401c9695f$f7ebb8c0$e7c32a40$@com> <AEC6C66638C05B468B556EA548C1A77D0155010B@trantor>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
Thread-index: AclpXq3FDdh9/hRMR7SA68V92eNifgAAPoJwAAAyQsAAADKfEA==
I had to disable both, and PAE. Only APIC=0 would not make any difference. I
will some further testing with Citrix Xenserver 5, using the same virtual
machine and another copy with their vmpd drivers. I bet that there is no
difference in performance. It seems to be a Xen architectural issue. Any
ideas?

-----Original Message-----
From: James Harper [mailto:james.harper@xxxxxxxxxxxxxxxx] 
Sent: Sunday, December 28, 2008 9:53 PM
To: Venefax; Dirk Utterback
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-devel] Windows SMP

> 
> The problem is not SMP, is ACPI. I installed a non-ACPI Hal, but SMP
> capable, and the performance went right up with 4 virtual processors.
> 
> I hope the developers can look into this mess.
> 

Can you have ACPI enabled but APIC disabled, or is that not a valid
configuration?

Or the other way around, can you have ACPI disabled but APIC enabled?

Maybe the APIC emulation is causing a performance loss?

James


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