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Re: [Xen-users] DomU to DomU throughput issue
| To: | Fasiha Ashraf <feehapk@xxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-users] DomU to DomU throughput issue |
| From: | Pasi Kärkkäinen <pasik@xxxxxx> |
| Date: | Wed, 16 Sep 2009 12:55:16 +0300 |
| Cc: | xen-users@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Wed, 16 Sep 2009 02:57:03 -0700 |
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On Wed, Sep 16, 2009 at 02:29:35PM +0530, Fasiha Ashraf wrote:
> Hi
> Is there anyone who has successfully resolved the low throughput problem in
> Guest communication.
> I am using Xen3.4.1 with PV os kernel 2.6.30-rc6-tip On fedora11. While
> running netperf benchmark on guests throughput results are very low
> DomU to DomU 0.29 Mbps
>
> Why is it so? What would be the problem. Is there any issue with fc11
> platform?
- Is domU <-> dom0 slow aswell?
- Is domU <-> internet slow?
- Do you have errors on domU ethX interfaces?
- Do you have errors no dom0 interfaces (pethx, all bridges, all vifs).
- Does domU or dom0 have high CPU-usage? What does "top" show in dom0,
and in domU?
- What does "xm top" say about CPU usage?
- Do you have errors in the logs? Please check
- dom0 dmesg
- dom0 /var/log/messages
- Xen log: "xm log"
- Xen dmesg: "xm dmesg"
- domU dmesg
- domU /var/log/messaegs
Please try all of the above.
-- Pasi
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