On Mon, Sep 06, 2010 at 02:44:59PM +0800, ma qiang wrote:
> > Do you mean 250 Mbit/sec ?
> Yes.
> > You should get much more.. how are you measuring the performance?
> > What benchmark are you using?
> I use an tool from ixia to test the network in the vm.
Try using some standard network performance testing tools
such as "iperf" or just regular ftp file transfers.
> > Are both the eth0 and eth1 connected to the same network/vlan?
> Yes. I run my test from another computer to connect to vm0 and vm1, and
> they all in the same switch.
> To be noted my cards are both 1000m network card.
>
How is the 'test server' connected?
> > When you run the network benchmark try running "xm top"
> > to monitor the overall cpu usage.. also run "top" in dom0
> > to see if there's a big cpu usage in dom0.
> No, the cpu is less than 20%
20% on dom0?
How about the domUs? Do they have big cpu usage?
What kind of guests do you have? pv? hvm? linux? windows?
-- Pasi
> On Mon, Sep 6, 2010 at 2:08 PM, Pasi Kärkkäinen <[1]pasik@xxxxxx> wrote:
> > On Mon, Sep 06, 2010 at 01:58:10PM +0800, ma qiang wrote:
> >> Hi all,
> >> I have install xen 3.4.3 based on centos5.4.
> >> I changed a line in /etc/xen/xend-config.sxp like below:
> >> (network-script network-bridge) ----> (network-script
> my-network-bridge)
> >>
> >> and #cat /etc/xen/scripts/my-network-script prints as below:
> >> #!/bin/sh
> >> /etc/xen/scripts/network-bridge "$@" netdev=eth0 bridge=eth0
> >> /etc/xen/scripts/network-bridge "$@" netdev=eth1 bridge=eth1
> >>
> >> Now I installed two vms, and set one vm using eth0, then set the other
> >> using eth1.
> >> So, I can connect internet in both vms.
> >>
> >> But now my problem is that the throughput of two network card is the
> >> same as only one network card.
> >> Another words, If I use the only one network card such as eth0 for the
> >> two vms, the throughput of eth0 is about 250m.
> >> But when I set one vm use eth0 and the other use eth1, the total
> >> throughput of eth0 and eth1 is about 250m too.
> >>
> >> That why? Any bottleneck?
> >> Thanks a lot.
> >>
> >
> > Do you mean 250 Mbit/sec ?
> >
> > You should get much more.. how are you measuring the performance?
> > What benchmark are you using?
> >
> > Are both the eth0 and eth1 connected to the same network/vlan?
> >
> > When you run the network benchmark try running "xm top"
> > to monitor the overall cpu usage.. also run "top" in dom0
> > to see if there's a big cpu usage in dom0.
> >
> > -- Pasi
> >
> >
>
> References
>
> Visible links
> 1. mailto:pasik@xxxxxx
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