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

["Dustin Henning" <Dustin.Henning@xxxxxxxxxxx>]

        SEP uses a crappy network driver (I can't remember what it's called,
but you're lucky it uninstalled properly, I had fits getting it off of some
of our real machines).  Any AV that doesn't include firewall shouldn't cause
this problem, and it's hard telling whether there is any AV that does
firewall and wouldn't.  The latter seems unlikely, though, if even the
Windows firewall is causing it.
        Dustin

-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of John McMonagle
Sent: Monday, April 04, 2011 17:22
To: xen-users@xxxxxxxxxxxxxxxxxxx
Cc: Dustin.Henning@xxxxxxxxxxx
Subject: Re: [Xen-users] Slow windows network with gplpv driver.

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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