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/

Home

xen-devel

[Top] [All Lists]

[Xen-devel] [PATCH] nestedsvm: reduce TLB flushes

from [Christoph Egger]

[Permanent Link][Original]

To:	"xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject:	[Xen-devel] [PATCH] nestedsvm: reduce TLB flushes
From:	Christoph Egger <Christoph.Egger@xxxxxxx>
Date:	Wed, 18 May 2011 17:26:06 +0200
Delivery-date:	Wed, 18 May 2011 08:34:10 -0700
Envelope-to:	www-data@xxxxxxxxxxxxxxxxxxx
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>
Sender:	xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent:	Mozilla/5.0 (X11; U; NetBSD amd64; en-US; rv:1.9.2.13) Gecko/20110202 Lightning/1.0b3pre Thunderbird/3.1.7


Reduce TLB flushes:
1. When we update the cr3 during VMRUN/VMEXIT emulation
   we toggle between n1asid and n2asid forth and back
   => no TLB flush needed
2. Only flush n1asid or n2asid depending on vcpu guest mode
   and not both unconditionally.

Signed-off-by: Christoph Egger <Christoph.Egger@xxxxxxx>

--
---to satisfy European Law for business letters:
Advanced Micro Devices GmbH
Einsteinring 24, 85689 Dornach b. Muenchen
Geschaeftsfuehrer: Alberto Bozzo, Andrew Bowd
Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen
Registergericht Muenchen, HRB Nr. 43632

xen_nh_asid.diff
Description: xen_nh_asid.diff

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

[More with this subject...]

<Prev in Thread]	Current Thread	[Next in Thread>
[Xen-devel] [PATCH] nestedsvm: reduce TLB flushes, Christoph Egger <=

Previous by Date:	Re: [Xen-devel] [GIT PULL] for-2.6.32/bug-fixes, Jan Beulich
Next by Date:	[Xen-devel] Too much VCPUS makes domU high CPU utiliazation, MaoXiaoyun
Previous by Thread:	[Xen-devel] Memory missing in 2.6.32.36, MaoXiaoyun
Next by Thread:	[Xen-devel] Too much VCPUS makes domU high CPU utiliazation, MaoXiaoyun
Indexes:	[Date] [Thread] [Top] [All Lists]

This site is hosted by Citrix