From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir@xensource.com>
Subject: Re: performance counters
Date: Fri, 16 Mar 2007 08:21:33 +0000
Message-ID: <C220040D.425B%keir@xensource.com>
References: <45FA60BA.76E4.0078.0@novell.com>
Mime-Version: 1.0
Content-Type: text/plain;
	charset="US-ASCII"
Content-Transfer-Encoding: 7bit
Return-path: <xen-devel-bounces@lists.xensource.com>
In-Reply-To: <45FA60BA.76E4.0078.0@novell.com>
List-Unsubscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
List-Post: <mailto:xen-devel@lists.xensource.com>
List-Help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-Subscribe: <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>,
	<mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
Sender: xen-devel-bounces@lists.xensource.com
Errors-To: xen-devel-bounces@lists.xensource.com
To: Jan Beulich <jbeulich@novell.com>, Keir Fraser <keir@xensource.com>
Cc: xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org




On 16/3/07 08:17, "Jan Beulich" <jbeulich@novell.com> wrote:

>> It has the added benefit of avoiding cacheline bouncing.
>> 
>> It just needs someone to implement this improvement. ;-)
> 
> I'll take care of this, but it may take me a few days to get to it. But I
> also think there's no need for rush here.

Indeed. The counters aren't even compiled by default. It may be, however,
that per-cpu non-atomic counters are cheap enough to enable all the time.
We'll have to see.

 -- Keir