Re: [Xen-users] Xen 3.2 Bridge performance problem (debian lenny)

[Alexander Pirsig <alex@xxxxxxxxxx>]

Hi again,

sorry it was my fault the problem is I used (ethtool -K xenbr1 tx off) 
in my DOM0-network config which is bad on high loads ;( right config 
that works for me looks like that:
# eth1 -> intern 1
iface eth1 inet static
       up ifconfig eth1 0.0.0.0 promisc up

# eth1 -> xenbr1
auto xenbr1
iface xenbr1 inet manual
       bridge_ports eth1
       bridge_fd 1
       bridge_stp off
       bridge_hello 1
       post-up ethtool -K xenbr1 tx on
       down ifconfig xenbr1 down
       post-down brctl delbr xenbr1

The (ethtool -K xenbr1 tx off) needs to be inside of DOMu on postup

Sorry again,

Cheers,

Alex


Alexander Pirsig wrote:
> Hello everybody,
>
> at the moment we're have a strange problem during high load on our 
> DOMUs Network services became unavailable for a short period 
> connection time takes several seconds.
> Will the service (tomcat) is still available from inside of the domU 
> connections from DOM0 and even from other servers hangs.
> If tried to desiable checksuming (ethtool -K eth0 tx off) on DOMUs 
> interface
> netstat output DOMU is as follows:
>
> netstat -an|awk '/tcp/ {print $6}'|sort|uniq -c
> =============================
>    231 ESTABLISHED
>    259 FIN_WAIT2
>      1 LAST_ACK
>      6 LISTEN
>    340 TIME_WAIT
>
>
> brctl show on DOM0:
> =============
> bridge name     bridge id               STP enabled     interfaces
> eth0            8000.001ec9edee5e       no              peth0
>                                                        vif135.0
>                                                        vif144.0
> xenbr1          8000.001ec9edee60       no              eth1
> xenbr2          8000.0015178538c2       no              eth2
>                                                        vif134.0
>                                                        vif137.0
> xenbr3          8000.0015178538c3       no              eth3
>                                                        vif143.0
>                                                        vif148.0
>
>
> One of DOMUs configuration:
> =====================
> kernel  = '/boot/vmlinuz-2.6.26-2-xen-amd64'
> ramdisk = '/boot/initrd.img-2.6.26-2-xen-amd64'
> extra='console=hvc0'
> memory  = '2400'
>
> vcpus = '8'
>
> #
> #  Disk device(s).
> #
> root    = '/dev/sda1 ro'
>
> disk    = [ 'phy:system/tomcat03-disk,sda1,w', 
> 'phy:system/tomcat03-swap,sda2,w' ]
> #
> #  Hostname
> #
> name    = 'tomcat03'
>
>
> #
> #  Networking
> #
> vif  = [ 'ip=192.168.0.98,mac=00:16:3E:41:2C:18,bridge=xenbr3' ]
>
> #
> #  Behaviour
> #
> on_poweroff = 'destroy'
> on_reboot   = 'restart'
> on_crash    = 'restart'
>
>
>
> How can I repeat?
>
> Regards,
>
> Alex
>
>
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users