Xen users - Dec 2008 - GPLPV + 32-bit Win2003R2 + Xen-3.3 unstable

I''m using the GPLPV drivers 0.9.11 with excellent network speedup on a
64-bit Windows 2003 R2 VM.

When I try the same under a 32-bit Windows 2003 R2 VM, the VM locks up
at the first sign of network traffic; even a ping from an external
client will bring it down. Using xentop I can see 100% cpu utilization
for that VM, and the vnc console becomes unresponsive.

With 0.9.12-pre4, the VM can take ping traffic from an external client.
When I load it up with ttcp from that client, it locks up again with the
same symptoms.

Removing /gplpv from boot.ini and restoring the qemu NIC makes the
problem disappear.

My s/w config is

Xen-3.3.0 release, 64-bit
SLES10 SP2 Dom0, 64-bit
Windows Server 2003 R2 Enterprise with SP2, 32-bit
GPLPV 0.9.11 / 0.9.12-pre4

Any pointers will be appreciated.

Thanks!

--
Anoop Iyer
MTS Product Development Engineer
AMD Performance CoE | Virtualization



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Could you post your domU config?
>>> "Iyer, Anoop" <anoop.iyer@amd.com> 2008/12/11 14:45
>>>
I''m using the GPLPV drivers 0.9.11 with excellent network speedup on a
64-bit Windows 2003 R2 VM.

When I try the same under a 32-bit Windows 2003 R2 VM, the VM locks up
at the first sign of network traffic; even a ping from an external
client will bring it down. Using xentop I can see 100% cpu utilization
for that VM, and the vnc console becomes unresponsive.

With 0.9.12-pre4, the VM can take ping traffic from an external client.
When I load it up with ttcp from that client, it locks up again with the
same symptoms.

Removing /gplpv from boot.ini and restoring the qemu NIC makes the
problem disappear.

My s/w config is

Xen-3.3.0 release, 64-bit
SLES10 SP2 Dom0, 64-bit
Windows Server 2003 R2 Enterprise with SP2, 32-bit
GPLPV 0.9.11 / 0.9.12-pre4

Any pointers will be appreciated.

Thanks!

--
Anoop Iyer
MTS Product Development Engineer
AMD Performance CoE | Virtualization






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Nick, here's my DomU config:

# Begin Anoop's DomU config
name="template0"
uuid="d6c89e78-fe81-b5eb-d230-d9a17f19e108"
memory=1024
vcpus=2
on_poweroff="destroy"
on_reboot="restart"
on_crash="destroy"
localtime=1

builder="hvm"
extid=0
device_model="/usr/lib/xen/bin/qemu-dm"
kernel="/usr/lib/xen/boot/hvmloader"
boot="c"
disk=[ 'file:/VMs/template0/template0_xen.img,hda,w', ]
vif=[ 'mac=00:16:3e:67:78:55,bridge=eth1',]
stdvga=0
vnc=1
vncunused=1
apic=1
acpi=1
pae=1

usb=1
usbdevice='tablet'

serial="pty"
# End Anoop's DomU config

- Anoop



From: Nick Couchman [mailto:Nick.Couchman@seakr.com] 
Sent: Thursday, December 11, 2008 5:15 PM
To: Iyer, Anoop; xen-users@lists.xensource.com
Subject: Re: [Xen-users] GPLPV + 32-bit Win2003R2 + Xen-3.3 unstable

Could you post your domU config?
>>> "Iyer, Anoop" <anoop.iyer@amd.com> 2008/12/11 14:45
>>>
I'm using the GPLPV drivers 0.9.11 with excellent network speedup on a
64-bit Windows 2003 R2 VM.

When I try the same under a 32-bit Windows 2003 R2 VM, the VM locks up
at the first sign of network traffic; even a ping from an external
client will bring it down. Using xentop I can see 100% cpu utilization
for that VM, and the vnc console becomes unresponsive.

With 0.9.12-pre4, the VM can take ping traffic from an external client.
When I load it up with ttcp from that client, it locks up again with the
same symptoms.

Removing /gplpv from boot.ini and restoring the qemu NIC makes the
problem disappear.

My s/w config is

Xen-3.3.0 release, 64-bit
SLES10 SP2 Dom0, 64-bit
Windows Server 2003 R2 Enterprise with SP2, 32-bit
GPLPV 0.9.11 / 0.9.12-pre4

Any pointers will be appreciated.

Thanks!

--
Anoop Iyer
MTS Product Development Engineer
AMD Performance CoE | Virtualization


_______________________________________________
Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

> 
> I''m using the GPLPV drivers 0.9.11 with excellent network speedup
on a
> 64-bit Windows 2003 R2 VM.
> 
> When I try the same under a 32-bit Windows 2003 R2 VM, the VM locks up
> at the first sign of network traffic; even a ping from an external
> client will bring it down. Using xentop I can see 100% cpu utilization
> for that VM, and the vnc console becomes unresponsive.
> 
> With 0.9.12-pre4, the VM can take ping traffic from an external
client.
> When I load it up with ttcp from that client, it locks up again with
the
> same symptoms.
> 
> Removing /gplpv from boot.ini and restoring the qemu NIC makes the
> problem disappear.
> 
> My s/w config is
> 
> Xen-3.3.0 release, 64-bit
> SLES10 SP2 Dom0, 64-bit
> Windows Server 2003 R2 Enterprise with SP2, 32-bit
> GPLPV 0.9.11 / 0.9.12-pre4
> 
> Any pointers will be appreciated.
> 
Can you please try disabling checksum offload and large send offload in
the advanced properties of the adapter?

Thanks

James

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Could you verify that you''re using an APIC MP HAL in Windows?  Also,
what''s your resource configuration look like for the network card?

-Nick


-----Original Message-----
From: Iyer, Anoop <anoop.iyer@amd.com>
To: Nick Couchman <Nick.Couchman@seakr.com>,
xen-users@lists.xensource.com
Subject: RE: [Xen-users] GPLPV + 32-bit Win2003R2 + Xen-3.3 unstable
Date: Thu, 11 Dec 2008 17:19:04 -0600


Nick, here''s my DomU config:

# Begin Anoop''s DomU config
name="template0"
uuid="d6c89e78-fe81-b5eb-d230-d9a17f19e108"
memory=1024
vcpus=2
on_poweroff="destroy"
on_reboot="restart"
on_crash="destroy"
localtime=1

builder="hvm"
extid=0
device_model="/usr/lib/xen/bin/qemu-dm"
kernel="/usr/lib/xen/boot/hvmloader"
boot="c"
disk=[ ''file:/VMs/template0/template0_xen.img,hda,w'', ]
vif=[ ''mac=00:16:3e:67:78:55,bridge=eth1'',]
stdvga=0
vnc=1
vncunused=1
apic=1
acpi=1
pae=1

usb=1
usbdevice=''tablet''

serial="pty"
# End Anoop''s DomU config

- Anoop



From: Nick Couchman [mailto:Nick.Couchman@seakr.com] 
Sent: Thursday, December 11, 2008 5:15 PM
To: Iyer, Anoop; xen-users@lists.xensource.com
Subject: Re: [Xen-users] GPLPV + 32-bit Win2003R2 + Xen-3.3 unstable

Could you post your domU config?
>>> "Iyer, Anoop" <anoop.iyer@amd.com> 2008/12/11 14:45
>>>
I''m using the GPLPV drivers 0.9.11 with excellent network speedup on a
64-bit Windows 2003 R2 VM.

When I try the same under a 32-bit Windows 2003 R2 VM, the VM locks up
at the first sign of network traffic; even a ping from an external
client will bring it down. Using xentop I can see 100% cpu utilization
for that VM, and the vnc console becomes unresponsive.

With 0.9.12-pre4, the VM can take ping traffic from an external client.
When I load it up with ttcp from that client, it locks up again with the
same symptoms.

Removing /gplpv from boot.ini and restoring the qemu NIC makes the
problem disappear.

My s/w config is

Xen-3.3.0 release, 64-bit
SLES10 SP2 Dom0, 64-bit
Windows Server 2003 R2 Enterprise with SP2, 32-bit
GPLPV 0.9.11 / 0.9.12-pre4

Any pointers will be appreciated.

Thanks!

--
Anoop Iyer
MTS Product Development Engineer
AMD Performance CoE | Virtualization




This e-mail may contain confidential and privileged material for the sole use of
the intended recipient.  If this email is not intended for you, or you are not
responsible for the delivery of this message to the intended recipient, please
note that this message may contain SEAKR Engineering (SEAKR)
Privileged/Proprietary Information.  In such a case, you are strictly prohibited
from downloading, photocopying, distributing or otherwise using this message,
its contents or attachments in any way.  If you have received this message in
error, please notify us immediately by replying to this e-mail and delete the
message from your mailbox.  Information contained in this message that does not
relate to the business of SEAKR is neither endorsed by nor attributable to
SEAKR.


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> Can you please try disabling checksum offload and large send offload
in
> the advanced properties of the adapter?
Thank you James -- that seems to do the trick. With this workaround I
was able to sustain 40 MB/s of traffic from an external client to my VM
for 500 seconds so far.

If this issue will be fixed in a later release of the GPLPV drivers,
I''ll be glad to test it. If not, I''ll continue using this
workaround.

- Anoop



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Xen-users mailing list
Xen-users@lists.xensource.com
http://lists.xensource.com/xen-users

> 
> > Can you please try disabling checksum offload and large send offload
> > in the advanced properties of the adapter?
> 
> Thank you James -- that seems to do the trick. With this workaround I
> was able to sustain 40 MB/s of traffic from an external client to my
VM
> for 500 seconds so far.
> 
> If this issue will be fixed in a later release of the GPLPV drivers,
> I''ll be glad to test it. If not, I''ll continue using this
workaround.
I''m not completely convinced that it''s actually a problem with
the GPLPV
drivers. The same issues have been reported with Linux PV domains. I''ll
keep my eye on it though.

James

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Hi,
can you please post your new config file! I think I''m having the same 
problem, but don''t know how to disable the options!

Thanks,
Sebastian

Iyer, Anoop schrieb:
>> Can you please try disabling checksum offload and large send offload
>>     
> in
>   
>> the advanced properties of the adapter?
>>     
>
> Thank you James -- that seems to do the trick. With this workaround I
> was able to sustain 40 MB/s of traffic from an external client to my VM
> for 500 seconds so far.
>
> If this issue will be fixed in a later release of the GPLPV drivers,
> I''ll be glad to test it. If not, I''ll continue using this
workaround.
>
> - Anoop
>
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@lists.xensource.com
> http://lists.xensource.com/xen-users
>
>   
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           Dr. Peter Schinzing
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> 
> Hi,
> can you please post your new config file! I think I''m having the
same
> problem, but don''t know how to disable the options!
> 
> Thanks,
> Sebastian
> 
The checksum offload is disabled by doing the following in windows (from
memory - I could have missed a step):

Go to ''network connections'', right click on the adapter, and
click
''Properties''

Click the ''Configure...'' button next to ''Xen Net
Device Driver''

Go to the ''Advanced'' tab

Change ''Checksum Offload'' to ''Disabled''

If that does actually make a difference, please let me know. I''m having
difficulty figuring out the circumstances under which it fails, as it
seems to work perfectly for me.

James

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There is no difference...
Actually, the problem I have is a different one, but the circumstances 
are the same. I''m trying to migrate a 32-Bit Win2003R2 VM with 
GPLPV-drivers (0.9.12-pre4) from one host to another (xen3.2). After 
submitting the command (xm migrate ....) the DomU is not available any 
more. On the first host the domU is called "migrating-win2003". The 
second recognizes that there is a migrating domU and lists the correct 
domU, but in paused state. It seems, that the migration is not 
completely finished.
Without the GPLPV drivers it works.
So anyone had a problem like that?

Sebastian

James Harper schrieb:
>> Hi,
>> can you please post your new config file! I think I''m having
the same
>> problem, but don''t know how to disable the options!
>>
>> Thanks,
>> Sebastian
>>
>>     
>
> The checksum offload is disabled by doing the following in windows (from
> memory - I could have missed a step):
>
> Go to ''network connections'', right click on the adapter,
and click
> ''Properties''
>
> Click the ''Configure...'' button next to ''Xen Net
Device Driver''
>
> Go to the ''Advanced'' tab
>
> Change ''Checksum Offload'' to ''Disabled''
>
> If that does actually make a difference, please let me know. I''m
having
> difficulty figuring out the circumstances under which it fails, as it
> seems to work perfectly for me.
>
> James
>
>   
-- 
Bitte prüfen Sie der Umwelt zuliebe, ob der Ausdruck dieser Mail erforderlich
ist.

Oldenburgische Landesbank AG

Vorsitzender des Aufsichtsrates: Andree Moschner
Vorstand:  Bernd Span, Sprecher
           Dr. Stefan Friedmann
           Dr. Peter Schinzing
Sitz der Gesellschaft: Oldenburg (Oldb)
Registergericht: Oldenburg (Oldb)
HR-Nummer: HRB 3003



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