Re: [Xen-users] Slow windows network with gplpv driver.

[John McMonagle <johnm@xxxxxxxxxxx>]

I think I have at have  figured out this issue.

The main problem was using Symantic sep.
Under XP removing sep and disabling windows firewall speed up by a factor of 
about 8.  Doing just one or the other had little affect.

Under server server 2003 or 2008 speed went up by a factor of about 2 - 3.

Anyone have any recommendations  on antivirus for server 2003 and 2008 or a 
link to some competent unbiased tests?

I mostly do linux and deal with windows that much.  
Thanks for all the help.

John


On Wednesday 09 March 2011 03:21:47 pm John McMonagle wrote:
> Dustin
>
> This is 4 of 8 real cores.
>
> I started with 2.
> Like to start testing a bit underpowered to see how things work.
> Is there an issue with multiple cores or changing the number of cores?
>
> John
>
> On Wednesday, March 09, 2011 02:58:37 pm Dustin Henning wrote:
> > John,
> >     I am running an 0.9.x version of GPLPV, so forgive me if I am not up
> > to date on this, but in that version, having more than 1 core
> > significantly slowed down WindowsXP.  If this is still the case, and if
> > it transfers to Server 2003, then you might find better performance with
> > 1 core, and if it shouldn't still be true, then you might have found a
> > new problem with the GPLPV driver.  Another possibility is that the
> > additional virtual cores are being pinned to hyperthreads instead of real
> > cores or something.  I am making these suggestions under the assumption
> > that you know making 4 virtual cores on 2 real cores host would degrade
> > performance for obvious reasons. Dustin
> >
> > -----Original Message-----
> > From: John McMonagle [mailto:johnm@xxxxxxxxxxx]
> > Sent: Wednesday, March 09, 2011 15:51
> > To: Dustin.Henning@xxxxxxxxxxx
> > Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: Re: [Xen-users] Slow windows network with gplpv driver.
> >
> > Guess I'm mostly used to linux.
> > iperf is a very simple tests and doesn't take good of hardware to get
> > close to
> > 1gbits/sec with gbit  ethernet.
> >
> > This machine will primarily do terminal services. it will access some
> > files on
> > Linux server.
> > We are a linux shop and that allows us to run some widows apps while
> > keeping
> >
> > all the users on linux terminals.
> >
> > Did a test of the current server 2003 real server and it's getting 230
> > Mbits
> >
> > /second.
> > Odds are the 160Mbits/second with SEP running will be Ok but I'd like to
> > do better.
> > Watching Resource monitor in server 2008 cpu goes to 100% while running
> > tests.
> > Dom0 stays at 0%.
> >
> > Ran into another strange thing.
> > I tried changing vcpus  from  from 2 to 4.
> > my networks speed dropped to 74 Mbits/s
> >
> > If I revert back to 2 it comes back to 160.
> > What can cause that?
> > I have not activate yet in case that matters.
> >
> > John
> >
> > On Wednesday, March 09, 2011 10:37:25 am Dustin Henning wrote:
> > > 1) SEP adds a network layer, it is going to slow you down, this is
> > > going
> >
> > to
> >
> > > be amplified HVM processor virtualization.
> > > 2) You're calling 318 Mbit/sec "usable" on Windows?  Really?  That's
> > > impressive on Windows unless you have a 10 Gbit NIC.
> > > The only suggestion I would have for your scenario is don't virtualize.
> > > I'm sure that's not what you want to hear, but I think you're asking
> > > too much. Dustin
> > >
> > > -----Original Message-----
> > > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
> > > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of John
> > > McMonagle Sent: Wednesday, March 09, 2011 11:30
> > > To: xen-users@xxxxxxxxxxxxxxxxxxx
> > > Subject: Re: [Xen-users] Slow windows network with gplpv driver.
> > >
> > > On Friday, March 04, 2011 02:32:25 pm John McMonagle wrote:
> > > > On Thursday 03 March 2011 09:13:39 pm John McMonagle wrote:
> > > > > On Thursday, March 03, 2011 05:57:21 pm you wrote:
> > > > > > > Just did a test with 32 bit xp with 0.11.0.238 drive.
> > > > > > > it show device as Xen Net device driver.
> > > > > > >
> > > > > > > Iperf gives 14.7 Mbits/sec
> > > > > > >
> > > > > > > Running an xp live boot cd  get 13.6 Mbits/sec
> > > > > > > Doesn't looks like the the pv driver is doing anything to help
> > > > > > > the
> > > >
> > > > I tried on a AMD server  and it was about the same percentage
> > > > improvement. The only thing that had any noticeable affect was
> > > > stopping the windows firewall.
> > > > Had no change with  /PATCHTPR or  disable checksum offloading and
> > > > large send offloading.
> > > >
> > > > The application seemed a bit more responsive I'll see what the users
> >
> > say.
> >
> > > > I'll try to install server 2008 next week and see what happens with
> >
> > that.
> >
> > > > Any one know any tricks to get single user Windows apps to behave in
> > > > a multi user environment?
> > > >
> > > > John
> > >
> > > I finally did an install of server 2008 on the same xen dom0.
> > > Before installing pv drivers get 43 Mbit/sec.
> > > better than double xp.
> > >
> > > With pv driver 328 Mbit/sec.
> > > Not spectacular but usable.
> > >
> > > Then I installed Synaptic Endpoint Protection.
> > > That brought me back to 162 Mbit/sec.
> > >
> > > Any suggestions?
> > >
> > > John
> > >
> > >
> > >
> > > _______________________________________________
> > > Xen-users mailing list
> > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > http://lists.xensource.com/xen-users
>
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