RE: [Xen-users] Release 0.9.5 of GPL PV Drivers for Windows

["Geoff Wiener" <gwiener@xxxxxxxxxxxxxxx>]

Hi James;

Sorry to be the bearer of bad news on that one...

> What bit width are you running (32 or 64)?

W2K3 SP2 R2 32 bit - I will try 64 bit next and post the results.

> Yes please to the screen shot, or at least give me the BSoD numbers.

Screen shot attached.  

> a copy of the 'disk=' lines in your config

For the machine that BSODs
disk = [ 'tap:qcow:/xenimages/w2k3/w2k3.cow,hda,w' ]
or
disk = [ 'tap:qcow:/xenimages/w2k3/w2k3.cow,hda,w',
'file:/isorep/disc1.iso,hdc:cdrom,r' ]

> output of xenstore-ls /local/domain/<id>/device/vbd

768= ""
 backend-id = "0"
 virtual-device = "768"
 device-type = "disk"
 state = "1
 backend = "/local/domain/0/backend/tap/52/768"
 
>In that output there will be a 'backend=' line, I'd like to see the
output of xenstore-ls on that too.

Unfortunately I can't get any output from that.. for example..

xenstore-ls /local/domain0/backend/tap/52/768
or
xenstore-ls /local/domain0/backend/tap/52/768/
or
xenstore-ls /local/domain0/backend/tap/52/

I tried a few variations of the command with no success.  I did not
notice in xenstore-ls (alone with no args) that the device-model =
"/usr/lib64/xen/bin/qemu-dm".. I don't know if that's relevant or not...

> can you also try running the tests whilst also running 'debugview'
from sysinternals.com?

With debugview running I selected "capture kernel, capture win32 &
passthrough" and ran the iometer test on the machine with the 0.9.5
drivers (RAW).  
The log is attached.

With regards to the "stop" messages, I did some digging and found the
following list of "stop-messages".  

http://www.updatexp.com/stop-messages.html

0x0000007b seems about right "inaccessible boot device".  I couldn't
find any info on the next one (oxf885ea98) but the third one, oxc0000034

http://www.neowin.net/forum/lofiversion/index.php/t512632.html

Is discussed at the above URL and has to do with .net framework.  I know
you use this for the shutdown scripts so I wondered if that was
meaningful?

I will try to make some time to install a 64bit W2K3 R2 later.

Lastly - what is the etiquette on cross posting to both user and devel
lists like this?  I do not subscribe to the devel list?  Perhaps I
should if I am going to post to it?   I just hit reply all...  Thanks.

Best Regards

Geoff


-----Original Message-----
From: James Harper [mailto:james.harper@xxxxxxxxxxxxxxxx] 
Sent: 02 June 2008 12:40 AM
To: Geoff Wiener; xen-users@xxxxxxxxxxxxxxxxxxx;
xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-users] Release 0.9.5 of GPL PV Drivers for Windows

What bit width are you running (32 or 64)?

> I get a BSOD.. I can send you a pretty screen shot if you like.  And
> depending on my "disk" line in the HVM config I get the BSOD at
different
> times.  Tap:aio bsods early in the boot and tap:qcow bsods quite late.

Yes please to the screen shot, or at least give me the BSoD numbers.

I'd also appreciate a copy of the 'disk=' lines in your config, and the
output of xenstore-ls /local/domain/<id>/device/vbd, eg 'xenstore-ls
/local/domain/198/device/vbd'. In that output there will be a 'backend='
line, I'd like to see the output of xenstore-ls on that too.

> 
> IOMETER Performance Results (see config attached)
> 

Well... that's a bit disappointing. I was hoping to see much better
performance but your results seem to indicate worse performance than
with the qemu drivers.

One thing that I've found is that Windows will give scsiport drivers
buffers on almost any alignment, especially for small requests (<
PAGE_SIZE). If that happens, we have to double buffer the requests and
there will be a fairly major performance hit. This happens very rarely
on my test machines but others could be a bit different...

The drivers will complain about this misalignment via debug output, can
you also try running the tests whilst also running 'debugview' from
sysinternals.com?

Thanks

James

bsod with qcow.JPG
Description: bsod with qcow.JPG

debugview-raw.LOG
Description: debugview-raw.LOG

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