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] early_cpu_init() and identify_cpu()

To: Jan Beulich <jbeulich@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] early_cpu_init() and identify_cpu()
From: Keir Fraser <keir@xxxxxxxxxxxxx>
Date: Tue, 17 Jul 2007 08:50:08 +0100
Delivery-date: Tue, 17 Jul 2007 00:48:05 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxx
In-reply-to: <469B4611.76E4.0078.0@xxxxxxxxxx>
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: AcfIRxhXVvBGJjQ6EdykoQAX8io7RQ==
Thread-topic: [Xen-devel] early_cpu_init() and identify_cpu()
User-agent: Microsoft-Entourage/11.3.3.061214
On 16/7/07 09:18, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

>> How much faster is scrolling of WC framebuffer on your test system?
> 
> That's a win of about 30%, and using movsq in memcpy() is another win of
> about 50%. Will probably create a vidmemmove()...

That still totally sucks then. Paging a full screen of text of, say 60
lines, done line-by-line will still take, say 60*300ms == 20 seconds(ish).

Implement this as a command-line option only if you must have it.

 -- Keir


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