From mboxrd@z Thu Jan  1 00:00:00 1970
From: Samuel Thibault <samuel.thibault@eu.citrix.com>
Subject: Re: Re: Scheduling groups, credit scheduler support
Date: Fri, 14 Dec 2007 16:26:13 +0000
Message-ID: <20071214162613.GK4296@implementation.uk.xensource.com>
References: <20071204135020.GB10634@silverwood.ncultra.org>
	<C37B8DFA.10E2F%Keir.Fraser@cl.cam.ac.uk>
	<20071214133536.GA19797@silverwood.ncultra.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: 8bit
Return-path: <xen-devel-bounces@lists.xensource.com>
Content-Disposition: inline
In-Reply-To: <20071214133536.GA19797@silverwood.ncultra.org>
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: "Mike D. Day" <ncmike@us.ibm.com>
Cc: xen-devel@lists.xensource.com
List-Id: xen-devel@lists.xenproject.org

Mike D. Day, le Fri 14 Dec 2007 08:35:36 -0500, a écrit :
> On 04/12/07 23:06 +0000, Keir Fraser wrote:
> > On 4/12/07 13:50, "Mike D. Day" <ncmike@us.ibm.com> wrote:
> > 
> > >> It's good to see these patches get aired again. I hope we can get some
> > >> integration with the ongoing stub domain work and get some numbers out to
> > >> prove better scalability and QoS. This would ease the passage of scheduler
> > >> group support into xen-unstable.
> > > 
> > > I previously published some benchmarks:
> > > 
> > > http://article.gmane.org/gmane.comp.emulators.xen.devel/39818/
> > 
> > Not slowing down microbenchmarks is the least we should expect for
> > acceptance. The feature needs to earn its keep in the tree by demonstrating
> > superior performance or scalability in a situation we care about. Like for
> > HVM stub domains. :-)
> 
> Yes of course. But it also must not slow normal scheduling, which is
> the point of these benchmarks. As soon as the stub domain is ready for
> testing I'll start performance work on hvm domains.

It is available on

http://xenbits.xensource.com/ext/xen-minios-stubdom.hg

I tested groups a bit (the merge goes very fine) but couldn't see a
difference, probably because my test case is very limited (just a
CPU burner in dom0), compared to the scheduling boost of the credit
scheduler.

Samuel