Re: [Xen-users] Windows 2008 - slow upload

[Tomek <timor@xxxxx>]

-------- Original Message  --------
Subject: Re: [Xen-users] Windows 2008 - slow upload
From: James Harper <james.harper@xxxxxxxxxxxxxxxx>
To: Tomek <timor@xxxxx>
Date: 04.08.2009 15:25

> So you aren't using Jumbo frames though? (I've never tested with Jumbo
> frames)
No, I don't use jambo frames.

> But Large Send was enabled in the DomU which was affecting
> DomU->external traffic, but not DomU->DomX traffic right?
Exactly. But I don't test DomU->Dom0 or Dom0->DomU. Dom0 is in different 
network on different interface:
- eth0 - Dom0 management, etc.,
- eth1 - DomU's interface with VLAN's.
I used this HOWTO for VLAN's configuration: 
http://renial.net/weblog/2007/02/27/xen-vlan/
> I'd still like to find what the root cause is (netback bug? GPLPV bug?
> Physical Ethernet device driver bug?) but I'm glad it's working for you
> now.
Tell me what you need and I will give it to you. You had time for me so 
I'm obliged to find some for you.
> Just to get this info in one spot (sorry if I'm asking you to repeat
> yourselves), please tell me the versions of:
> GPLPV
gplpv_fre_wlh_x86_0.10.0.69, gplpv_fre_wlh_x86_0.10.0.83 and 
gplpv_fre_wlh_x86_0.10.0.86 (I've tested on these three).

> Xen (hypervisor)
# xm info
host                   : xxx
release                : 2.6.26-2-xen-amd64
version                : #1 SMP Sun Jul 26 22:39:03 UTC 2009
machine                : x86_64
nr_cpus                : 4
nr_nodes               : 1
cores_per_socket       : 4
threads_per_core       : 1
cpu_mhz                : 2833
hw_caps                : 
bfebfbff:20100800:00000000:00000140:040ce3bd:00000000:00000001
total_memory           : 10237
free_memory            : 252
node_to_cpu            : node0:0-3
xen_major              : 3
xen_minor              : 2
xen_extra              : -1
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 
hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : unavailable
cc_compiler            : gcc version 4.3.1 (Debian 4.3.1-2)
cc_compile_by          : waldi
cc_compile_domain      : debian.org
cc_compile_date        : Sat Jun 28 09:32:18 UTC 2008
xend_config_format     : 4


> Dom0 Kernel
> Dom0 kernel patch source if you aren't running the standard 2.6.18
> kernel that ships with Xen, eg a distro kernel perhaps?
# uname -a
Linux xxx 2.6.26-2-xen-amd64 #1 SMP Sun Jul 26 22:39:03 UTC 2009 x86_64 
GNU/Linux
> Dom0 network module (eg e1000e)
bnx2

> Dom0 network card (just the make and chipset should be fine)
Ethernet controller: Broadcom Corporation NetXtreme II BCM5708 Gigabit 
Ethernet (rev 12)
> TX speed from DomU to Dom0 as measured with 'iperf -w1m' (approx will be
> fine)
It could be quite hard in my current configuration.

> TX speed from DomU to a physical machine on the other side of a 1GBit
> interface from Dom0
With large data offload enabled/disabled or both?

--
Regards,
Thomas.

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