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Re: [Xen-devel] Video Presentation on PCI Express x16 VGA Pass Through

from [Mr. Teo En Ming (Zhang Enming)] [Permanent Link][Original]
To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-devel] Video Presentation on PCI Express x16 VGA Pass Through to Xen-based Windows XP Home Edition HVM Virtual Machine
From: "Mr. Teo En Ming (Zhang Enming)" <space.time.universe@xxxxxxxxx>
Date: Mon, 14 Sep 2009 03:33:57 +0800
Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
Delivery-date: Sun, 13 Sep 2009 12:34:42 -0700
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Dear Pasi,

No, I have not tried it yet. I have 8 GB of memory on my computer.

What does dom0_mem parameter do?

If I set dom0_mem, does it mean I cannot access more than 4 GB of memory even though I have 8 GB of memory?

--
Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical Engineering)
Alma Maters:
(1) Singapore Polytechnic
(2) National University of Singapore
Blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
Email: space.time.universe@xxxxxxxxx
MSN: teoenming@xxxxxxxxxxx
Mobile Phone: +65-9648-9798
Street: Bedok Reservoir Road
Republic of Singapore

On Mon, Sep 14, 2009 at 3:26 AM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
On Mon, Sep 14, 2009 at 02:22:00AM +0800, Mr. Teo En Ming (Zhang Enming) wrote:
> Dear Pasi,
>
> Yes, I have tried the nomodeset kernel parameter without result.
>
> I couldn't get Jeremy's rebase/master branch (pvops dom 0 kernel 2.6.31) to
> work despite disabling all of USB support in the kernel. I will troubleshoot
> this issue with the serial console enabled another time.
>
> Meanwhile, I got Linus' mainline kernel 2.6.31 to work on my system. So
> apparently the dom 0 patched kernel 2.6.31 has some issues or I did not
> configure it properly.
>

Did you try pv_ops dom0 kernel with dom0_mem=1024M parameter for xen.gz?

Some others are seeing problems with the recent kernels if they have
>4096M of memory for dom0.

-- Pasi

> --
> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
> Engineering)
> Alma Maters:
> (1) Singapore Polytechnic
> (2) National University of Singapore
> Blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
> Email: space.time.universe@xxxxxxxxx
> MSN: teoenming@xxxxxxxxxxx
> Mobile Phone: +65-9648-9798
> Street: Bedok Reservoir Road
> Republic of Singapore
>
> On Sun, Sep 13, 2009 at 5:12 PM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
>
> > On Sun, Sep 13, 2009 at 08:31:26AM +0800, Mr. Teo En Ming (Zhang Enming)
> > wrote:
> > > I have disabled all USB support in the kernel but I still couldn't get
> > pvops
> > > dom0-patched kernel 2.6.31 final to complete loading. All I get is a
> > > blinking cursor at the top left hand corner of the monitor.
> > >
> >
> > Did you try "nomodeset" parameter for the dom0 kernel?
> >
> > Have you tried setting up a serial console and capturing the kernel boot
> > messages?
> >
> > -- Pasi
> >
> > > --
> > > Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
> > > Engineering)
> > > Alma Maters:
> > > (1) Singapore Polytechnic
> > > (2) National University of Singapore
> > > Blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
> > > Email: space.time.universe@xxxxxxxxx
> > > MSN: teoenming@xxxxxxxxxxx
> > > Mobile Phone: +65-9648-9798
> > > Street: Bedok Reservoir Road
> > > Republic of Singapore
> > >
> > > On Sat, Sep 12, 2009 at 8:23 PM, Mr. Teo En Ming (Zhang Enming) <
> > > space.time.universe@xxxxxxxxx> wrote:
> > >
> > > > OK I have UHCI, OHCI, EHCI, and xHCI all disabled in the kernel but I
> > still
> > > > can't get pvops dom 0 kernel 2.6.31 final to boot up completely.
> > > >
> > > > Really puzzled.
> > > >
> > > > --
> > > > Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
> > > > Engineering)
> > > > Alma Maters:
> > > > (1) Singapore Polytechnic
> > > > (2) National University of Singapore
> > > > Blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
> > > > Email: space.time.universe@xxxxxxxxx
> > > > MSN: teoenming@xxxxxxxxxxx
> > > > Mobile Phone: +65-9648-9798
> > > > Street: Bedok Reservoir Road
> > > > Republic of Singapore
> > > >
> > > > On Sat, Sep 12, 2009 at 6:11 PM, Mr. Teo En Ming (Zhang Enming) <
> > > > space.time.universe@xxxxxxxxx> wrote:
> > > >
> > > >> I have disabled USB 1.0 and USB 2.0 drivers simultaneously and enabled
> > USB
> > > >> 3.0 driver but the kernel stops loading.
> > > >>
> > > >> Then I totally disabled all USB support by passing the "nousb"
> > parameter
> > > >> to the kernel but it still stops loading.
> > > >>
> > > >> pvops dom 0 2.6.31 final can't work.
> > > >>
> > > >> --
> > > >> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
> > > >> Engineering)
> > > >> Alma Maters:
> > > >> (1) Singapore Polytechnic
> > > >> (2) National University of Singapore
> > > >> Blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
> > > >> Email: space.time.universe@xxxxxxxxx
> > > >> MSN: teoenming@xxxxxxxxxxx
> > > >> Mobile Phone: +65-9648-9798
> > > >> Street: Bedok Reservoir Road
> > > >> Republic of Singapore
> > > >>
> > > >> On Sat, Sep 12, 2009 at 4:44 PM, Mr. Teo En Ming (Zhang Enming) <
> > > >> space.time.universe@xxxxxxxxx> wrote:
> > > >>
> > > >>> After disabling the USB 1.0 driver, but leaving the USB 2.0 driver
> > > >>> compiled statically into the kernel, I get an error with the USB 2.0
> > driver.
> > > >>> This means I cannot use either of the USB 1.0 and USB 2.0 drivers.
> > > >>>
> > > >>> Please refer to my blog post here:
> > > >>>
> > > >>>
> > > >>>
> > http://teo-en-ming-aka-zhang-enming.blogspot.com/2009/09/after-disabling-usb-10-host-controller.html
> > > >>>
> > > >>> --
> > > >>> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics)
> > BEng(Hons)(Mechanical
> > > >>> Engineering)
> > > >>> Alma Maters:
> > > >>> (1) Singapore Polytechnic
> > > >>> (2) National University of Singapore
> > > >>> Blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
> > > >>> Email: space.time.universe@xxxxxxxxx
> > > >>> MSN: teoenming@xxxxxxxxxxx
> > > >>> Mobile Phone: +65-9648-9798
> > > >>> Street: Bedok Reservoir Road
> > > >>> Republic of Singapore
> > > >>>
> > > >>> On Sat, Sep 12, 2009 at 10:52 AM, Mr. Teo En Ming (Zhang Enming) <
> > > >>> space.time.universe@xxxxxxxxx> wrote:
> > > >>>
> > > >>>> Hi,
> > > >>>>
> > > >>>> I have tried pvops dom 0 kernel 2.6.31 final from Jeremy's tree.
> > > >>>>
> > > >>>> But it gave me a USB host controller died error.
> > > >>>>
> > > >>>> Please refer to the error output here:
> > > >>>>
> > > >>>>
> > > >>>>
> > http://teo-en-ming-aka-zhang-enming.blogspot.com/2009/09/error-with-pv-ops-dom-0-kernel-2631.html
> > > >>>>
> > > >>>> --
> > > >>>> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics)
> > BEng(Hons)(Mechanical
> > > >>>> Engineering)
> > > >>>> Alma Maters:
> > > >>>> (1) Singapore Polytechnic
> > > >>>> (2) National University of Singapore
> > > >>>> Blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
> > > >>>> Email: space.time.universe@xxxxxxxxx
> > > >>>> MSN: teoenming@xxxxxxxxxxx
> > > >>>> Mobile Phone: +65-9648-9798
> > > >>>> Street: Bedok Reservoir Road
> > > >>>> Republic of Singapore
> > > >>>>
> > > >>>> On Sat, Sep 12, 2009 at 12:03 AM, Pasi Kärkkäinen <pasik@xxxxxx>
> > wrote:
> > > >>>>
> > > >>>>> On Fri, Sep 11, 2009 at 11:37:15PM +0800, Mr. Teo En Ming (Zhang
> > > >>>>> Enming) wrote:
> > > >>>>> > Hi,
> > > >>>>> >
> > > >>>>> > Please refer to the disk I/O benchmark results here:
> > > >>>>> >
> > > >>>>> >
> > > >>>>>
> > http://teo-en-ming-aka-zhang-enming.blogspot.com/2009/09/disk-io-benchmark-results-with-xen.html
> > > >>>>> >
> > > >>>>> > Results show that Win XP HVM guest runs faster in 2.6.30-rc3 than
> > > >>>>> > 2.6.31-rc6.
> > > >>>>> >
> > > >>>>>
> > > >>>>> Btw you might also want to test with the latest rebase/master tree;
> > > >>>>> it's
> > > >>>>> at Linux 2.6.31 final now.
> > > >>>>>
> > > >>>>> -- Pasi
> > > >>>>>
> > > >>>>> > --
> > > >>>>> > Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics)
> > > >>>>> BEng(Hons)(Mechanical
> > > >>>>> > Engineering)
> > > >>>>> > Alma Maters:
> > > >>>>> > (1) Singapore Polytechnic
> > > >>>>> > (2) National University of Singapore
> > > >>>>> > Blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
> > > >>>>> > Email: space.time.universe@xxxxxxxxx
> > > >>>>> > MSN: teoenming@xxxxxxxxxxx
> > > >>>>> > Mobile Phone: +65-9648-9798
> > > >>>>> > Street: Bedok Reservoir Road
> > > >>>>> > Republic of Singapore
> > > >>>>> >
> > > >>>>> > On Fri, Sep 11, 2009 at 8:19 AM, Mr. Teo En Ming (Zhang Enming) <
> > > >>>>> > space.time.universe@xxxxxxxxx> wrote:
> > > >>>>> >
> > > >>>>> > > Hi,
> > > >>>>> > >
> > > >>>>> > > I will try to stop unnecessary services on Dom 0 and do a disk
> > I/O
> > > >>>>> > > benchmark between WinXP domU on 2.6.30-rc3 and 2.6.31-rc6
> > tonight
> > > >>>>> (Singapore
> > > >>>>> > > time). That will be more conclusive.
> > > >>>>> > >
> > > >>>>> > > --
> > > >>>>> > > Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics)
> > > >>>>> BEng(Hons)(Mechanical
> > > >>>>> > > Engineering)
> > > >>>>> > > Alma Maters:
> > > >>>>> > > (1) Singapore Polytechnic
> > > >>>>> > > (2) National University of Singapore
> > > >>>>> > > Blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
> > > >>>>> > > Email: space.time.universe@xxxxxxxxx
> > > >>>>> > > MSN: teoenming@xxxxxxxxxxx
> > > >>>>> > > Mobile Phone: +65-9648-9798
> > > >>>>> > > Street: Bedok Reservoir Road
> > > >>>>> > > Republic of Singapore
> > > >>>>> > >
> > > >>>>> > > On Fri, Sep 11, 2009 at 2:17 AM, Jeremy Fitzhardinge <
> > > >>>>> jeremy@xxxxxxxx>wrote:
> > > >>>>> > >
> > > >>>>> > >> On 09/10/09 07:03, Pasi Kärkkäinen wrote:
> > > >>>>> > >> > On Thu, Sep 10, 2009 at 08:28:03PM +0800, Mr. Teo En Ming
> > (Zhang
> > > >>>>> Enming)
> > > >>>>> > >> wrote:
> > > >>>>> > >> >
> > > >>>>> > >> >> Dear All,
> > > >>>>> > >> >>
> > > >>>>> > >> >> Here is my latest video presentation on VGA passthrough.
> > Please
> > > >>>>> check
> > > >>>>> > >> out my
> > > >>>>> > >> >> blog at http://teo-en-ming-aka-zhang-enming.blogspot.com/or
> > > >>>>> the
> > > >>>>> > >> Youtube
> > > >>>>> > >> >> link at http://www.youtube.com/watch?v=1ia3IwG6tp4
> > > >>>>> > >> >>
> > > >>>>> > >> >> The "not enough free resources" problem for nVidia Geforce
> > 8400
> > > >>>>> GS PCI
> > > >>>>> > >> >> Express x16 graphics card in earlier presentation videos:
> > > >>>>> > >> >>
> > > >>>>> > >> >> http://www.youtube.com/watch?v=HNEiSI...<
> > > >>>>> > >> http://www.youtube.com/watch?v=HNEiSInrav0>
> > > >>>>> > >> >>
> > > >>>>> > >> >> http://www.youtube.com/watch?v=_hOT_9...<
> > > >>>>> > >> http://www.youtube.com/watch?v=_hOT_9LIG5w>
> > > >>>>> > >> >>
> > > >>>>> > >> >> was fixed. Device manager in Windows XP HVM domU no longer
> > > >>>>> shows an
> > > >>>>> > >> >> exclamation mark besides the nVidia Geforce 8400 GS
> > graphics
> > > >>>>> card. The
> > > >>>>> > >> >> device is working properly and the resources tab shows the
> > > >>>>> available
> > > >>>>> > >> memory
> > > >>>>> > >> >> ranges.
> > > >>>>> > >> >>
> > > >>>>> > >> >> Full VGA passthrough to Windows XP HVM guest operating
> > system
> > > >>>>> using Xen
> > > >>>>> > >> >> virtualization has been realized. I am now able to run 3-D
> > > >>>>> video
> > > >>>>> > >> benchmarks
> > > >>>>> > >> >> on the passed through nVidia GeForce 8400 GS graphics card.
> > > >>>>> > >> >>
> > > >>>>> > >> >> All this is possible using Xen 3.5 hypervisor with Intel
> > > >>>>> supplied VGA
> > > >>>>> > >> >> passthrough patches. Instead of using pvops dom0 kernel
> > > >>>>> 2.6.31-rc6
> > > >>>>> > >> which
> > > >>>>> > >> >> causes Win XP domU to run slowly, I am now using pvops dom0
> > > >>>>> kernel
> > > >>>>> > >> >> 2.6.30-rc3.
> > > >>>>> > >> >>
> > > >>>>> > >> >>
> > > >>>>> > >> > Jeremy: Are you aware of any changes after 2.6.30-rc3 that
> > could
> > > >>>>> cause
> > > >>>>> > >> > this HVM slowness?
> > > >>>>> > >> >
> > > >>>>> > >>
> > > >>>>> > >> I can't think of anything, unless the new swiotlb code is
> > causing
> > > >>>>> > >> problems.
> > > >>>>> > >>
> > > >>>>> > >> > Any tips how it could be debugged?
> > > >>>>> > >> >
> > > >>>>> > >>
> > > >>>>> > >> It would help to isolate where the slowness is coming from.
> >  How
> > > >>>>> much
> > > >>>>> > >> slowdown are we talking about?  Is the HVM domain doing lots
> > of IO
> > > >>>>> at
> > > >>>>> > >> the time?  Are there any processes using lots of time in dom0?
> > > >>>>>  What's
> > > >>>>> > >> the interrupt rate like?
> > > >>>>> > >>
> > > >>>>> > >>    J
> > > >>>>> > >>
> > > >>>>> > >
> > > >>>>> > >
> > > >>>>> > >
> > > >>>>> > >
> > > >>>>> > >
> > > >>>>>
> > > >>>>
> > > >>>>
> > > >>>>
> > > >>>>
> > > >>>>
> > > >>>
> > > >>>
> > > >>>
> > > >>>
> > > >>
> > > >>
> > > >>
> > > >
> > > >
> > > >
> > > >
> >




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