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Re: [Xen-users] DomU to DomU throughput issue

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: Re: [Xen-users] DomU to DomU throughput issue
From: Fasiha Ashraf <feehapk@xxxxxxxxxxx>
Date: Thu, 17 Sep 2009 12:22:59 +0530 (IST)
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
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- Is domU <-> dom0 slow aswell?
No its working well the throughput is around 2000 to 3000 Mbps in this case
- Is domU <-> internet slow?
No, Its working well.

- Do you have errors on domU ethX interfaces?
No such errors seen.
- Do you have errors no dom0 interfaces (pethx, all bridges, all vifs).
No, errors
- Does domU or dom0 have high CPU-usage? What does "top" show in dom0,
  and in domU?
To the max 10 to 20%  while running netperf
- What does "xm top" say about CPU usage?
cpu usage 10 to 20%
- Do you have errors in the logs? Please check
    - dom0 dmesg
NO such messages
    - dom0 /var/log/messages
No messages else this

Sep 14 14:37:09 HPCNL-SR-2 kernel: vif1.0 (vif): not using net_device_ops yet

Sep 14 14:37:09 HPCNL-SR-2 NetworkManager: nm_device_ethernet_new: assertion `driver != NULL' failed

Sep 14 14:37:10 HPCNL-SR-2 kernel: device vif1.0 entered promiscuous mode

Sep 14 14:37:10 HPCNL-SR-2 kernel: eth0: topology change detected, propagating

Sep 14 14:37:10 HPCNL-SR-2 kernel: eth0: port 2(vif1.0) entering forwarding state

Sep 14 14:37:10 HPCNL-SR-2 logger: /etc/xen/scripts/vif-bridge: iptables setup failed. This may affect guest networking.

Sep 14 14:37:11 HPCNL-SR-2 avahi-daemon[1439]: Registering new address record for fe80::fcff:ffff:feff:ffff on vif1.0.*.

Sep 14 14:37:11 HPCNL-SR-2 kernel: blkback: ring-ref 8, event-channel 9, protocol 1 (x86_32-abi)

Sep 14 14:37:14 HPCNL-SR-2 nm-system-settings: Added default wired connection 'Auto vif1.0' for /org/freedesktop/Hal/devices/net_fe_ff_ff_ff_ff_ff

    - Xen log: "xm log"
    - Xen dmesg: "xm dmesg"
    - domU dmesg
    - domU /var/log/messaegs

What does that mean. I am trying all the other logs as well. thanks for your concern.


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