From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marco Sinhoreli Subject: Re: windows domU disk performance graph comparing hvm vs stubdom vs pv drivers Date: Tue, 23 Feb 2010 17:47:28 -0300 Message-ID: <20fe3cf61002231247w3d62a7f3y7570986596864cca@mail.gmail.com> References: <5411dbdc1002191441q4becdba9o61168bc986533e6@mail.gmail.com> <5411dbdc1002220914m2cf15fack76aed42a4fca1a32@mail.gmail.com> <5411dbdc1002221313y59866dd2k3ba528fe2b5499d@mail.gmail.com> <20100223144424.GB25741@phenom.dumpdata.com> <20100223193926.GX2761@reaktio.net> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1318356541==" Return-path: In-Reply-To: <20100223193926.GX2761@reaktio.net> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org --===============1318356541== Content-Type: multipart/alternative; boundary=00c09f8a4db26f7d9704804aa898 --00c09f8a4db26f7d9704804aa898 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Keith, Do you have some KVM graph? It will be interesting to compare both. Cheers On Tue, Feb 23, 2010 at 4:39 PM, Pasi K=C3=A4rkk=C3=A4inen w= rote: > On Tue, Feb 23, 2010 at 09:44:24AM -0500, Konrad Rzeszutek Wilk wrote: > > > > > That is strange because in that configuration I get a far better > > > > > disk bandwidth with stubdoms compared to qemu running in dom0. > > > > > > > > > > > > > What type of test are you doing? > > > > > > > > > > these are the results I got a while ago running a simple "dd > if=3D/dev/zero > > > of=3Dfile" for 10 seconds: > > > > Keep in mind that iometer (both the Windows a Linux version) by default > > do random seak of 50% reads and 50% writes. They do have some set of > > templates - "web server", "file server", "database server" that change > > the read/write ratio, size of blocks, and the queue length.(fyi, you ca= n > > use fio to set the same values, if you can't get dynamo to compile on > > your Linux box). > > > > Does iometer run correctly on Linux nowadays? I remember it having proble= ms > with more than 1 outstanding IO.. > > -- Pasi > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel > --=20 Marco Sinhoreli --00c09f8a4db26f7d9704804aa898 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Hi Keith,

Do you have some KVM graph? It will be interes= ting to compare both.


Cheers
On Tue, Feb 23, 2010 at 4:39 PM, Pasi K=C3=A4rk= k=C3=A4inen <pasik@iki= .fi> wrote:
On Tue, Feb 23, 2010 at 0= 9:44:24AM -0500, Konrad Rzeszutek Wilk wrote:
> > > > That is strange because in that configuration I get a f= ar better
> > > > disk bandwidth with stubdoms compared to qemu running i= n dom0.
> > > >
> > >
> > > What type of test are you doing?
> > >
> >
> > these are the results I got a while ago running a simple "dd= if=3D/dev/zero
> > of=3Dfile" for 10 seconds:
>
> Keep in mind that iometer (both the Windows a Linux version) by defaul= t
> do random seak of 50% reads and 50% writes. They do have some set of > templates - "web server", "file server", "dat= abase server" that change
> the read/write ratio, size of blocks, and the queue length.(fyi, you c= an
> use fio to set the same values, if you can't get dynamo to compile= on
> your Linux box).
>

Does iometer run correctly on Linux nowadays? I remember it having pr= oblems
with more than 1 outstanding IO..

-- Pasi


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Xen-devel mailing list
Xen-devel@lists.xensource.= com
http://l= ists.xensource.com/xen-devel



--
Marco Sinho= reli
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