Re: [Xen-users] Slow network with Win2k3, HVM and GPLPV

[Olivier Cant <olivier@xxxxxxxxxx>]

Hello,

thanks for your answer, I have just tried between two xin2k3 with 1 vcpu but the situation remains the same.

Olivier

Le 29/03/11 00:06, James Harper a écrit :

When I'm in front of a computer I'll email a link for a version that might fix this issue. In the meantime can you test with vcpus=1 and see if that improves things?

Sent from my iPhone

On 29/03/2011, at 2:44, "Olivier Cant" <olivier@xxxxxxxxxx> wrote:

Sorry, I shouldn't have used the reply button ...

Hi,

I'm having some real hard time with the gplpv driver and Windows2k3 DomU on xen 4.0

This is a xen 4 install from debian squeeze withour much changes in the configuration

I've install the gplpv driver in the DomU, everything seems to work fine but I'm having slow data transfert between two windows DomU (even on the same physical host).  I barely reach 100Mbps on a Gbit interface (usualy around 8 - 10 MBytes / s).

I have read quite a lot on this "issue" on the list and various other sources.  I have tried to disable "Checksum offload" and "Large Send Offload" in the DomU but nothing changed.

By the way, this doesn't affect the Linux DomU (I get full Gbit data speed there)

I'm running out of ideas, any advice would be much appreciated.

Below is my DomU config file and network configuration :

Cheers

Olivier

DomU :
kernel = "/usr/lib/xen-4.0/boot/hvmloader"

builder='hvm'
acpi=1
apic=1
vcpus = 8

memory = 12288
shadow_memory = 8
name = "patologix"
vif = [  'type=paravirtualized, bridge=eth0' ]
disk = [
   'phy:/dev/datastore1/patologix-hda,hda,w',
   'phy:/dev/datastore1/patologix-hdb,hdb,w',
   'phy:/dev/datastore1/patologix-hdd,hdd,w',
   'phy:/dev/datastore1/patologix-hde,hde,w',

#  'file:/mnt/SW_CD_Windows_Svr_Std_2003_R2_32-BIT_X64_English_ISO_x64_1_MLF_X13-73750.ISO,hdc:cdrom,r',

]
device_model = '/usr/lib64/xen-4.0/bin/qemu-dm'

# boot on floppy (a), hard disk (c) or CD-ROM (d)
# default: hard disk, cd-rom, floppy
boot="dc"

vfb = [ 'type=vnc,vncdisplay=19,vncpasswd=s3cr3t,vnclisten=0.0.0.0,keymap=fr' ]


#sdl=0
#vnc=1
#vncconsole=1
#vncpasswd=''
stdvga=0
serial='pty'
usbdevice='tablet'

in my xend-config.sxp the network configuration looks like :

(network-script network-bridge)

and the bridge configured on the server :
root@furax:~# brctl show
bridge name    bridge id        STP enabled    interfaces
eth0        8000.0025900ce62c    no        peth0
                            vif10.0
                            vif12.0
                            vif15.0
                            vif17.0
                            vif20.0
                            vif3.0
                            vif4.0
                            vif6.0
                            vif7.0
                            vif8.0
                            vif9.0

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--


Olivier Cant
CEO

Mobile : +32 (0)497 64 18 22
olivier.cant@xxxxxxxxxx


Rue de la Station, 2
B-4347 Fexhe-le-Haut-Clocher
Tel : +32 (0)4 341 25 81
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