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: (progress on hpet accuracy) and Re: [Xen-devel] [PATCH] Add a timer

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: (progress on hpet accuracy) and Re: [Xen-devel] [PATCH] Add a timer mode that disables pending missed ticks
From: Dave Winchell <dwinchell@xxxxxxxxxxxxxxx>
Date: Tue, 26 Feb 2008 10:49:01 -0500
Cc: "dan.magenheimer@xxxxxxxxxx" <dan.magenheimer@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Deepak Patel <deepak.patel@xxxxxxxxxx>
Delivery-date: Wed, 27 Feb 2008 08:19:40 -0800
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <C3E9D91E.1CE8E%Keir.Fraser@xxxxxxxxxxxx>
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>
References: <C3E9D91E.1CE8E%Keir.Fraser@xxxxxxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
User-agent: Mozilla Thunderbird 1.0.7-1.1.fc4 (X11/20050929)
Keir Fraser wrote:

On 26/2/08 14:45, "Dave Winchell" <dwinchell@xxxxxxxxxxxxxxx> wrote:

If this is an integration of hpet into the vpt.c infrastructure then that
would be very welcome.

So far it is not, however I may head in that direction.
Last night's test had an error of .065% on one guest so I still have some
work to do.

Then I hope that the accuracy improvements have come from a set of changes
whose effects are both explicable and generally for the good (rather than
artefacts of how a particular sub-point release of Linux drives the HPET).
I believe that my changes meet these requirements. Your suggestion to layer
on vpt.c is a good one that I will pursue.

- Dave

-- Keir

Xen-devel mailing list