Re: [Qemu-devel] windows guest virtio serial and balloon driver test issues

[Cao,Bing Bu]

On 11/29/2011 08:36 PM, Vadim Rozenfeld wrote:
> On Tue, 2011-11-29 at 08:58 +0800, Cao,Bing Bu wrote:
> > Hi,
> >
> >       Rozenfeld,Thanks,got it!
> >
> >       And do you know whether there are some sufficient test tools (such
> > as IOmeter)
> >       to test the virtio driver performance?
> IoMeter is good. But you also might be interested in
> SQLIOSim, database hammer, and diskio (part of WLK) + xperf.
> > On 11/25/2011 02:42 PM, Vadim Rozenfeld wrote:
> > > On Fri, 2011-11-25 at 09:59 +0800, Cao,Bing Bu wrote:
> > > > Hi,all
> > > >
> > > >
> > > > Thanks,Frenkel.The test application of the balloon must be run as
> > > > admin.
> > > >
> > > >
> > > >
> > > > But I found 2 problems(question) this week when testing windows guest
> > > > drivers:
> > > >
> > > >
> > > >         *
> > > >       If only virtio serial driver installed,the virtio serial test app
> > > > can not enumerate/find the virtio serial device,
> > > >       but after virtio balloon driver installed,the app can find the
> > > > virtio serial device correctly.
> > > >       Because of the same GUID which balloon and serial both use?
> > > Correct. This test application is a very simplified one. We published it
> > > mostly as an example, but not as a real test application. It doesn't
> > > enumerate all virtio serial instances, rather just find the
> > > first one and use it.
> > > >         *
> > > >       When inflate/deflate the balloon size using qemu monitor balloon
> > > > command,
> > > >       the total physical memory did not decrease/increase
> > > > correspondingly,as seen from "resource monitor",
> > > >       only the "available memory" size descrease/increase.But I test on
> > > > other Linux guest,
> > > >       the total physical memory of the guest OS was changed.
> > > >
> > > >       Is it a problem? If not,is it confusing to user?
> > > >       Related to the windows internal memory management?
> > > Total physical memory on Windows will always be the same,
> > > because we don't hot-plug/unplug physical memory.
> > > Balloon driver works with non-paged pool memory instead.
> > > So, every time you inflate or deflate balloon in your system,
> > > you should see "Available memory" is changing, while physical
> > > will always be the same.
> > >
> > > Best,
> > > Vadim.
> > >
> > > > On 11/21/2011 06:33 PM, Arkady Frenkel wrote:
> > > > > On 11/21/2011 10:39 AM, Cao,Bing Bu wrote:
> > > > > > Hi,
> > > > > >
> > > > > >       Recently,I am testing windows guest driver on Win7 and
> > > > > > WinXP(32bit) with the latest windows guest driver development source.
> > > > > >       Download from
> > > > > > http://alt.fedoraproject.org/pub/alt/virtio-win/latest/images/src/
> > > > > >
> > > > > >
> > > > > > virtio-blk:
> > > > > >       It seems OK both on Win7 and WinXP,the r/w performance is better
> > > > > > than IDE disk.
> > > > > >
> > > > > >
> > > > > >
> > > > > > virtio-serial:
> > > > > >       I tried to test virtio serial driver using the test application in
> > > > > > the project.
> > > > > >
> > > > > >       WinXP:
> > > > > >       Write: OK
> > > > > >       Read: Error: Read File Failed.
> > > > > >
> > > > > >       Win7:
> > > > > >       The test application return error "can not find vioserial device".
> > > > > >       But i debug the code and check that the GetDevicePath() return
> > > > > > value is not NULL,and same as the value when testing on WinXP.
> > > > > >       Why the CreateFile() in init() not called? (:
> > > > > >
> > > > > >
> > > > > > virtio-balloon:
> > > > > >
> > > > > >       QEMU monitor: device_add virtio-balloon-pci
> > > > > >
> > > > > >       On the guest,a new device "PCI standard RAM controller" added.
> > > > > >       But the Device Manager prompt "No driver installed for this
> > > > > > device", but install the driver "balloon.sys" failed.
> > > > > >       It said the driver is up to date.    Confused. (:
> > > > > >
> > > > > >       How can I install and test the balloon driver on Windows?
> > > > > >
> > > > > >
> > > > > >
> > > > > > The kvm-guest-drivers-windows.git on kernel.org is not available,is
> > > > > > there any mirror git repository?
> > > > > > Any mail-list or bugzilla for windows guest driver?
> > > > > >
> > > > > > Any help from will be appreciated.
> > > > > You need to run serial test app as admin only.
> > > > >
> > > > > To install balloon you have to go throw additional option when click on
> > > > > "Browse my computer for driver software". Choose "Let me pick from the
> > > > > list of device drivers on my computer" option.
> > > > >
> > > > > Arkady
> > > > Best regards
> > > > Cao,Bing Bu
Thanks you,Vadim.(:

Is there anything TO-DO or need further optimization in current windows 
guest driver?
How could I contribute to the windows guest driver development(test 
patches,sign-off patches,bug fix,etc.)?

--
Best Regards,
Cao,Bing Bu