On Fri, Oct 30, 2009 at 04:35:00PM +0800, Mr. Teo En Ming (Zhang Enming) wrote:
> Dear All,
>
> I have solved the problem.
>
> With reference to
> [1]http://lists.xensource.com/archives/html/xen-devel/2009-05/msg01327.html
> and
>
> [2]http://hightechsorcery.com/2008/03/virtualization-tip-always-disable-checksumming-virtual-ethernet-devices
> , I have executed the following command as root on all my 6 compute nodes
> (each compute node is a F11 linux 64-bit PV virtual machine).
>
> # ethtool -K eth0 tx off gso on
>
Jeremy: Do you know why this is still needed nowadays?
Where's the bug? Why doesn't it work with the defaults?
-- Pasi
<snip>
> On Fri, Oct 30, 2009 at 4:12 PM, Mr. Teo En Ming (Zhang Enming)
> <[7]space.time.universe@xxxxxxxxx> wrote:
>
> Dear All,
>
> I have googled something which may help to solve my problem.
>
> [Xen-devel] Network drop on domU (netfront: rx->offset: 0, size: 4294967295)
>
>
> [8]http://lists.xensource.com/archives/html/xen-devel/2009-05/msg01274.html
>
> Virtualization Tip: Always disable checksumming on virtual ethernet devices
>
>
> [9]http://hightechsorcery.com/2008/03/virtualization-tip-always-disable-checksumming-virtual-ethernet-devices
>
> Let me try to work on it first.
>
<snip>
> On Fri, Oct 30, 2009 at 2:53 PM, Mr. Teo En Ming (Zhang Enming)
> <[19]space.time.universe@xxxxxxxxx> wrote:
>
> Dear All,
>
> Here are more virtual network interface eth0 kernel messages. Notice
> the "net eth0: rx->offset: 0" messages. Are they of significance?
>
> Node 1
>
> Oct 30 22:40:34 enming-f11-pv-hpc-node0001 mountd[1304]:
> authenticated mount request from [20]192.168.1.253:1009 for
> /home/enming/mpich2-install/bin (/home/enming/mpich2-install/bin)
> Oct 30 22:40:56 enming-f11-pv-hpc-node0001 mountd[1304]:
> authenticated mount request from [21]192.168.1.252:877 for
> /home/enming/mpich2-install/bin (/home/enming/mpich2-install/bin)
> Oct 30 22:41:19 enming-f11-pv-hpc-node0001 mountd[1304]:
> authenticated mount request from [22]192.168.1.251:1000 for
> /home/enming/mpich2-install/bin (/home/enming/mpich2-install/bin)
> Oct 30 22:41:41 enming-f11-pv-hpc-node0001 mountd[1304]:
> authenticated mount request from [23]192.168.1.250:882 for
> /home/enming/mpich2-install/bin (/home/enming/mpich2-install/bin)
> Oct 30 22:42:04 enming-f11-pv-hpc-node0001 mountd[1304]:
> authenticated mount request from [24]192.168.1.249:953 for
> /home/enming/mpich2-install/bin (/home/enming/mpich2-install/bin)
> Oct 30 22:42:34 enming-f11-pv-hpc-node0001 mpd: mpd starting; no
> mpdid yet
> Oct 30 22:42:34 enming-f11-pv-hpc-node0001 mpd: mpd has
> mpdid=enming-f11-pv-hpc-node0001_48545 (port=48545)
> Oct 30 22:42:37 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:37 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:37 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:38 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:38 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:38 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:39 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:39 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:39 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:40 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:46 enming-f11-pv-hpc-node0001 kernel: __ratelimit: 12
> callbacks suppressed
> Oct 30 22:42:46 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:46 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:46 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:46 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:46 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:46 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:46 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:46 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:47 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:47 enming-f11-pv-hpc-node0001 kernel: net eth0:
> rx->offset: 0, size: 4294967295
>
> Node 6
>
> Oct 30 22:42:44 enming-f11-pv-hpc-node0006 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:44 enming-f11-pv-hpc-node0006 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:44 enming-f11-pv-hpc-node0006 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:44 enming-f11-pv-hpc-node0006 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:42:48 enming-f11-pv-hpc-node0006 mpd: mpd starting; no
> mpdid yet
> Oct 30 22:42:48 enming-f11-pv-hpc-node0006 mpd: mpd has
> mpdid=enming-f11-pv-hpc-node0006_52805 (port=52805)
> Oct 30 22:46:00 enming-f11-pv-hpc-node0006 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:46:00 enming-f11-pv-hpc-node0006 kernel: net eth0:
> rx->offset: 0, size: 4294967295
> Oct 30 22:46:00 enming-f11-pv-hpc-node0006 kernel: net eth0:
> rx->offset: 0, size: 4294967295
>
> Node 1 NFS Server Configuration
>
> [root@enming-f11-pv-hpc-node0001 ~]# cat /etc/exports
> /home/enming/mpich2-install/bin [25]192.168.1.0/24(ro)
>
> Node 2 /etc/fstab Configuration Entry for NFS Client
>
> 192.168.1.254:/home/enming/mpich2-install/bin
> /home/enming/mpich2-install/bin nfs
> rsize=8192,wsize=8192,timeo=14,intr
>
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