RE: [Xen-users] Another GPLPV pre-release 0.9.11-pre7

[Arjan Filius <iafilius@xxxxxxxxx>]

Hello James ea.


On Mon, 2008-07-14 at 20:18 +1000, James Harper wrote:
> > Hello James, and others
> > 
> > I'm rather new on this ML, and tested (performance) this drivers on
> > -Xen 3.2.1 (out of the box opensuse 11.0)
> > -Xen enterpise 3.1
> > and on both domU OS windows server 2003R3
> > 
> > tested performance with iperf RX and TX.
> > on both xen platforms i'd have to had to disable "Large Send offload",
> if
> > not i didn't came above 1Mbit/s with TX.
> 
> What is your physical NIC in your DomU? Do you know if it has support
> for large send?
> 

it's a vlan interface on dom0, which is eth4:

# ethtool -k eth4
Offload parameters for eth4:
rx-checksumming: on
tx-checksumming: on
scatter-gather: on
tcp segmentation offload: on
udp fragmentation offload: off
generic segmentation offload: on

# ethtool -i eth4
driver: bnx2
version: 1.7.4
firmware-version: 1.9.6
bus-info: 0000:03:00.0

lspci -v:
03:00.0 Ethernet controller: Broadcom Corporation NetXtreme II BCM5708
Gigabit Ethernet (rev 12)
        Subsystem: Hewlett-Packard Company NC373i Integrated
Multifunction Gigabit Server Adapter
        Flags: bus master, 66MHz, medium devsel, latency 64, IRQ 16
        Memory at f0000000 (64-bit, non-prefetchable) [size=32M]
        [virtual] Expansion ROM at d8500000 [disabled] [size=128K]
        Capabilities: [40] PCI-X non-bridge device
        Capabilities: [48] Power Management version 2
        Capabilities: [50] Vital Product Data <?>
        Capabilities: [58] Message Signalled Interrupts: Mask- 64bit+
Queue=0/0 Enable-
        Kernel driver in use: bnx2
        Kernel modules: bnx2


So it doesn't have direct access to the nic, it's the vlan above it.


> > performance results with a test machine in same subnet, but beeing
> another
> > physical machine:
> > Xen 3.2.1 (opensuse)
> >   RX: 0.0-60.0 sec  6.32 GBytes    905 Mbits/sec
> >   TX:                              314 Mbits/sec
> 
> Was that with gplpv?
> 

Yes

> > 
> > Xen enterprise 3.2
> >   RX: 0.0-60.0 sec  3.46 GBytes    496 Mbits/sec
> >   TX: 0.0-60.0 sec    681 MBytes  95.2 Mbits/sec
> 
> Did that have any pv drivers?
> 

Yes, that's with the gplpv drivers. 

so all tests are or with gplpv or with commercial pv driver.

I tested also opensuse 11.0 xen 3.2.1 with realtek emulation, but at
85Mbit/s RX i didn't look any further.


Regards,

> > 
> > for comparison on Xen enterprice with delevered (commercial) PV driver:
> >   RX  0.0-60.0 sec  6.31 GBytes    904 Mbits/sec
> >   TX: 0.0-59.9 sec  2.78 GBytes    399 Mbits/sec
> > 
> 
> Thanks for the feedback.
> 
> James
> 
> 
> 


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