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

[Peter Booth <peter_booth@xxxxxx>]

Just out of interest, do you any domu vmstat mpstat or sar output from  
the problem time?
Sent from my iPhone

On Jun 25, 2009, at 9:59 AM, Alexander Pirsig <alex@xxxxxxxxxx> wrote:

> 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
>
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