[mpich-discuss] (mpiexec 392): no msg recvd from mpd when expecting ack of request
Mr. Teo En Ming (Zhang Enming)
space.time.universe at gmail.com
Fri Oct 30 06:31:01 CDT 2009
If I execute "mpdboot -n 6 -f mpd.hosts --ncpus=2" on the master node, will
I get --ncpus=2 for mpd.py on all the remaining compute nodes?
My virtual machines have 2 virtual processors each.
--
Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
Engineering)
Alma Maters:
(1) Singapore Polytechnic
(2) National University of Singapore
My blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
My Youtube videos: http://www.youtube.com/user/enmingteo
Email: space.time.universe at gmail.com
MSN: teoenming at hotmail.com
Mobile Phone (SingTel): +65-9648-9798
Mobile Phone (Starhub Prepaid): +65-8369-2618
Age: 31 (as at 30 Oct 2009)
Height: 1.78 meters
Race: Chinese
Dialect: Hokkien
Street: Bedok Reservoir Road
Country: Singapore
On Fri, Oct 30, 2009 at 6:54 PM, Mr. Teo En Ming (Zhang Enming) <
space.time.universe at gmail.com> wrote:
> Check out my screenshots (15 png images) at my blog here:
>
>
> http://teo-en-ming-aka-zhang-enming.blogspot.com/2009/10/using-xen-virtualization-environment.html
>
>
> --
> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
> Engineering)
> Alma Maters:
> (1) Singapore Polytechnic
> (2) National University of Singapore
> My blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
> My Youtube videos: http://www.youtube.com/user/enmingteo
> Email: space.time.universe at gmail.com
> MSN: teoenming at hotmail.com
> Mobile Phone (SingTel): +65-9648-9798
> Mobile Phone (Starhub Prepaid): +65-8369-2618
> Age: 31 (as at 30 Oct 2009)
> Height: 1.78 meters
> Race: Chinese
> Dialect: Hokkien
> Street: Bedok Reservoir Road
> Country: Singapore
>
> On Fri, Oct 30, 2009 at 6:23 PM, Mr. Teo En Ming (Zhang Enming) <
> space.time.universe at gmail.com> wrote:
>
>> Dear All,
>>
>> I have solved the problem.
>>
>> With reference to
>> http://lists.xensource.com/archives/html/xen-devel/2009-05/msg01327.htmland
>> 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
>>
>> Now I can successfully run mpiexec to execute MPI and non-MPI jobs on my
>> Virtual HPC Compute Cluster.
>>
>> *Topic: [Xen-users] Using Xen Virtualization Environment for Development
>> and Testing of Supercomputing and High Performance Computing (HPC) Cluster
>> MPICH2 MPI-2 Applications
>>
>> URL:
>> http://lists.xensource.com/archives/html/xen-devel/2009-10/msg01440.html
>> *
>>
>> --
>> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
>> Engineering)
>> Alma Maters:
>> (1) Singapore Polytechnic
>> (2) National University of Singapore
>> My blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
>> My Youtube videos: http://www.youtube.com/user/enmingteo
>> Email: space.time.universe at gmail.com
>> MSN: teoenming at hotmail.com
>> Mobile Phone (SingTel): +65-9648-9798
>> Mobile Phone (Starhub Prepaid): +65-8369-2618
>> Age: 31 (as at 30 Oct 2009)
>> Height: 1.78 meters
>> Race: Chinese
>> Dialect: Hokkien
>> Street: Bedok Reservoir Road
>> Country: Singapore
>>
>>
>>
>> On Fri, Oct 30, 2009 at 4:13 PM, Mr. Teo En Ming (Zhang Enming) <
>> space.time.universe at gmail.com> 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)*
>>> http://lists.xensource.com/archives/html/xen-devel/2009-05/msg01274.html
>>>
>>> Virtualization Tip: Always disable checksumming on virtual ethernet
>>> devices
>>>
>>> http://hightechsorcery.com/2008/03/virtualization-tip-always-disable-checksumming-virtual-ethernet-devices
>>>
>>>
>>> Let me try to work on it first.
>>>
>>>
>>> --
>>> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
>>> Engineering)
>>> Alma Maters:
>>> (1) Singapore Polytechnic
>>> (2) National University of Singapore
>>> My blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
>>> My Youtube videos: http://www.youtube.com/user/enmingteo
>>> Email: space.time.universe at gmail.com
>>> MSN: teoenming at hotmail.com
>>> Mobile Phone (SingTel): +65-9648-9798
>>> Mobile Phone (Starhub Prepaid): +65-8369-2618
>>> Age: 31 (as at 30 Oct 2009)
>>> Height: 1.78 meters
>>> Race: Chinese
>>> Dialect: Hokkien
>>> Street: Bedok Reservoir Road
>>> Country: Singapore
>>>
>>>
>>>
>>> On Fri, Oct 30, 2009 at 3:56 PM, Mr. Teo En Ming (Zhang Enming) <
>>> space.time.universe at gmail.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> I have reverted to the 2-node troubleshooting scenario. I have started
>>>> node 1 and node 2.
>>>>
>>>> On node 1, I will try to bring up the ring of mpd for the 2 nodes using
>>>> mpdboot and try to execute mpiexec. On node 2, I will capture the tcpdump
>>>> messages on virtual network interface eth0.
>>>>
>>>> Please see attached PNG screenshots. They are numbered in sequence.
>>>>
>>>> Please check if there are any problems.
>>>>
>>>> Thank you.
>>>>
>>>> --
>>>> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
>>>> Engineering)
>>>> Alma Maters:
>>>> (1) Singapore Polytechnic
>>>> (2) National University of Singapore
>>>> My blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
>>>> My Youtube videos: http://www.youtube.com/user/enmingteo
>>>> Email: space.time.universe at gmail.com
>>>> MSN: teoenming at hotmail.com
>>>> Mobile Phone (SingTel): +65-9648-9798
>>>> Mobile Phone (Starhub Prepaid): +65-8369-2618
>>>> Age: 31 (as at 30 Oct 2009)
>>>> Height: 1.78 meters
>>>> Race: Chinese
>>>> Dialect: Hokkien
>>>> Street: Bedok Reservoir Road
>>>> Country: Singapore
>>>>
>>>>
>>>>
>>>> On Fri, Oct 30, 2009 at 2:55 PM, Mr. Teo En Ming (Zhang Enming) <
>>>> space.time.universe at gmail.com> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> 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 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 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 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 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 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 at enming-f11-pv-hpc-node0001 ~]# cat /etc/exports
>>>>> /home/enming/mpich2-install/bin 192.168.1.0/24(ro)<http://192.168.1.0/24%28ro%29>
>>>>>
>>>>> *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
>>>>>
>>>>> --
>>>>> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
>>>>> Engineering)
>>>>> Alma Maters:
>>>>> (1) Singapore Polytechnic
>>>>> (2) National University of Singapore
>>>>> My blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
>>>>> My Youtube videos: http://www.youtube.com/user/enmingteo
>>>>> Email: space.time.universe at gmail.com
>>>>> MSN: teoenming at hotmail.com
>>>>> Mobile Phone (SingTel): +65-9648-9798
>>>>> Mobile Phone (Starhub Prepaid): +65-8369-2618
>>>>> Age: 31 (as at 30 Oct 2009)
>>>>> Height: 1.78 meters
>>>>> Race: Chinese
>>>>> Dialect: Hokkien
>>>>> Street: Bedok Reservoir Road
>>>>> Country: Singapore
>>>>>
>>>>> On Fri, Oct 30, 2009 at 2:14 PM, Mr. Teo En Ming (Zhang Enming) <
>>>>> space.time.universe at gmail.com> wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I have noticed that there are Receive Errors (RX-ERR) in all of my 6
>>>>>> compute nodes. It appears that there may be problems with the virtual
>>>>>> network interface eth0 in Xen networking.
>>>>>>
>>>>>> =================================================
>>>>>>
>>>>>> Node 1:
>>>>>>
>>>>>>
>>>>>> [root at enming-f11-pv-hpc-node0001 ~]# netstat -i
>>>>>> Kernel Interface table
>>>>>> Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR
>>>>>> TX-DRP TX-OVR Flg
>>>>>> eth0 1500 0 5824 27 0 0 5056 0
>>>>>> 0 0 BMRU
>>>>>>
>>>>>> lo 16436 0 127 0 0 0 127 0
>>>>>> 0 0 LRU
>>>>>> [root at enming-f11-pv-hpc-node0001 ~]# ps -ef | grep mpd
>>>>>>
>>>>>> enming 1505 1 0 21:44 ? 00:00:00 python2.6
>>>>>> /home/enming/mpich2-install/bin/mpd.py --ncpus=1 -e -d
>>>>>> root 1650 1576 0 22:07 pts/0 00:00:00 grep mpd
>>>>>>
>>>>>> Node 2:
>>>>>>
>>>>>> [root at enming-f11-pv-hpc-node0002 ~]# netstat -i
>>>>>>
>>>>>> Kernel Interface table
>>>>>> Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR
>>>>>> TX-DRP TX-OVR Flg
>>>>>> eth0 1500 0 1504 7 0 0 1417
>>>>>> 0 0 0 BMRU
>>>>>> lo 16436 0 44 0 0 0 44 0
>>>>>> 0 0 LRU
>>>>>>
>>>>>> Node 3:
>>>>>>
>>>>>> [root at enming-f11-pv-hpc-node0003 ~]# netstat -i
>>>>>>
>>>>>> Kernel Interface table
>>>>>> Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR
>>>>>> TX-DRP TX-OVR Flg
>>>>>> eth0 1500 0 1520 12 0 0 1467 0
>>>>>> 0 0 BMRU
>>>>>> lo 16436 0 42 0 0 0 42 0
>>>>>> 0 0 LRU
>>>>>>
>>>>>> Node 4:
>>>>>>
>>>>>> [root at enming-f11-pv-hpc-node0004 ~]# netstat -i
>>>>>>
>>>>>> Kernel Interface table
>>>>>> Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR
>>>>>> TX-DRP TX-OVR Flg
>>>>>> eth0 1500 0 1528 10 0 0 1514 0
>>>>>> 0 0 BMRU
>>>>>> lo 16436 0 44 0 0 0 44 0
>>>>>> 0 0 LRU
>>>>>>
>>>>>> Node 5:
>>>>>>
>>>>>> [root at enming-f11-pv-hpc-node0005 ~]# netstat -i
>>>>>>
>>>>>> Kernel Interface table
>>>>>> Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR
>>>>>> TX-DRP TX-OVR Flg
>>>>>> eth0 1500 0 1416 11 0 0 1412
>>>>>> 0 0 0 BMRU
>>>>>> lo 16436 0 44 0 0 0 44 0
>>>>>> 0 0 LRU
>>>>>>
>>>>>> Node 6:
>>>>>>
>>>>>> [root at enming-f11-pv-hpc-node0006 ~]# netstat -i
>>>>>>
>>>>>> Kernel Interface table
>>>>>> Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR
>>>>>> TX-DRP TX-OVR Flg
>>>>>> eth0 1500 0 1474 9 0 0 1504 0
>>>>>> 0 0 BMRU
>>>>>> lo 16436 0 44 0 0 0 44 0
>>>>>> 0 0 LRU
>>>>>>
>>>>>> ================================================
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics) BEng(Hons)(Mechanical
>>>>>> Engineering)
>>>>>> Alma Maters:
>>>>>> (1) Singapore Polytechnic
>>>>>> (2) National University of Singapore
>>>>>> My blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
>>>>>> My Youtube videos: http://www.youtube.com/user/enmingteo
>>>>>> Email: space.time.universe at gmail.com
>>>>>> MSN: teoenming at hotmail.com
>>>>>> Mobile Phone (SingTel): +65-9648-9798
>>>>>> Mobile Phone (Starhub Prepaid): +65-8369-2618
>>>>>> Age: 31 (as at 30 Oct 2009)
>>>>>> Height: 1.78 meters
>>>>>> Race: Chinese
>>>>>> Dialect: Hokkien
>>>>>> Street: Bedok Reservoir Road
>>>>>> Country: Singapore
>>>>>>
>>>>>> On Fri, Oct 30, 2009 at 2:07 PM, Mr. Teo En Ming (Zhang Enming) <
>>>>>> space.time.universe at gmail.com> wrote:
>>>>>>
>>>>>>> All the six compute nodes are identical PV virtual machines.
>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics)
>>>>>>> BEng(Hons)(Mechanical Engineering)
>>>>>>> Alma Maters:
>>>>>>> (1) Singapore Polytechnic
>>>>>>> (2) National University of Singapore
>>>>>>> My blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
>>>>>>> My Youtube videos: http://www.youtube.com/user/enmingteo
>>>>>>> Email: space.time.universe at gmail.com
>>>>>>> MSN: teoenming at hotmail.com
>>>>>>> Mobile Phone (SingTel): +65-9648-9798
>>>>>>> Mobile Phone (Starhub Prepaid): +65-8369-2618
>>>>>>> Age: 31 (as at 30 Oct 2009)
>>>>>>> Height: 1.78 meters
>>>>>>> Race: Chinese
>>>>>>> Dialect: Hokkien
>>>>>>> Street: Bedok Reservoir Road
>>>>>>> Country: Singapore
>>>>>>>
>>>>>>> On Fri, Oct 30, 2009 at 2:04 PM, Mr. Teo En Ming (Zhang Enming) <
>>>>>>> space.time.universe at gmail.com> wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> I have changed the communication method from nemesis (high
>>>>>>>> performance network method) to ssm (socket for nodes and shared memory
>>>>>>>> within a node) by recompiling MPICH2. I have also pre-set the MAC address of
>>>>>>>> the virtual network adapter eth0 in each compute node (each compute node is
>>>>>>>> a Xen paravirtualized virtual machine) by configuring the vif directive in
>>>>>>>> each PV domU configuration file.
>>>>>>>>
>>>>>>>> Additionally, I have also turned off iptables to facilitate
>>>>>>>> troubleshooting and communication between all mpd daemons in each node. SSH
>>>>>>>> without password is possible between all the compute nodes.
>>>>>>>>
>>>>>>>> After having done all of the above, I am still encountering the
>>>>>>>> MPIEXEC 392 error.
>>>>>>>>
>>>>>>>>
>>>>>>>> mpiexec_enming-f11-pv-hpc-node0001 (mpiexec 392): no msg recvd from
>>>>>>>> mpd when expecting ack of request
>>>>>>>>
>>>>>>>> =================================================
>>>>>>>>
>>>>>>>> Master Node / Compute Node 1:
>>>>>>>>
>>>>>>>> [enming at enming-f11-pv-hpc-node0001 ~]$ ps -ef | grep mpd
>>>>>>>> enming 1499 1455 0 21:44 pts/0 00:00:00 grep mpd
>>>>>>>> [enming at enming-f11-pv-hpc-node0001 ~]$ mpdboot -n 6
>>>>>>>> [enming at enming-f11-pv-hpc-node0001 ~]$ mpdtrace -l
>>>>>>>> enming-f11-pv-hpc-node0001_34188 (192.168.1.254)
>>>>>>>> enming-f11-pv-hpc-node0005_39315 (192.168.1.250)
>>>>>>>> enming-f11-pv-hpc-node0004_46914 (192.168.1.251)
>>>>>>>> enming-f11-pv-hpc-node0003_36478 (192.168.1.252)
>>>>>>>> enming-f11-pv-hpc-node0002_42012 (192.168.1.253)
>>>>>>>> enming-f11-pv-hpc-node0006_55525 (192.168.1.249)
>>>>>>>> [enming at enming-f11-pv-hpc-node0001 ~]$ ps -ef | grep mpd
>>>>>>>> enming 1505 1 0 21:44 ? 00:00:00 python2.6
>>>>>>>> /home/enming/mpich2-install/bin/mpd.py --ncpus=1 -e -d
>>>>>>>>
>>>>>>>> Compute Node 2:
>>>>>>>>
>>>>>>>> [enming at enming-f11-pv-hpc-node0002 ~]$ mpdtrace -l
>>>>>>>> enming-f11-pv-hpc-node0002_42012 (192.168.1.253)
>>>>>>>> enming-f11-pv-hpc-node0006_55525 (192.168.1.249)
>>>>>>>> enming-f11-pv-hpc-node0001_34188 (192.168.1.254)
>>>>>>>> enming-f11-pv-hpc-node0005_39315 (192.168.1.250)
>>>>>>>> enming-f11-pv-hpc-node0004_46914 (192.168.1.251)
>>>>>>>> enming-f11-pv-hpc-node0003_36478 (192.168.1.252)
>>>>>>>> [enming at enming-f11-pv-hpc-node0002 ~]$ ps -ef | grep mpd
>>>>>>>> enming 1431 1 0 21:44 ? 00:00:00 python2.6
>>>>>>>> /home/enming/mpich2-install/bin/mpd.py -h enming-f11-pv-hpc-node0001 -p
>>>>>>>> 34188 --ncpus=1 -e -d
>>>>>>>> enming 1481 1436 0 21:46 pts/0 00:00:00 grep mpd
>>>>>>>>
>>>>>>>> Compute Node 3:
>>>>>>>>
>>>>>>>> [enming at enming-f11-pv-hpc-node0003 ~]$ mpdtrace -l
>>>>>>>> enming-f11-pv-hpc-node0003_36478 (192.168.1.252)
>>>>>>>> enming-f11-pv-hpc-node0002_42012 (192.168.1.253)
>>>>>>>> enming-f11-pv-hpc-node0006_55525 (192.168.1.249)
>>>>>>>> enming-f11-pv-hpc-node0001_34188 (192.168.1.254)
>>>>>>>> enming-f11-pv-hpc-node0005_39315 (192.168.1.250)
>>>>>>>> enming-f11-pv-hpc-node0004_46914 (192.168.1.251)
>>>>>>>> [enming at enming-f11-pv-hpc-node0003 ~]$ ps -ef | grep mpd
>>>>>>>> enming 1422 1 0 21:44 ? 00:00:00 python2.6
>>>>>>>> /home/enming/mpich2-install/bin/mpd.py -h enming-f11-pv-hpc-node0001 -p
>>>>>>>> 34188 --ncpus=1 -e -d
>>>>>>>> enming 1473 1427 0 21:47 pts/0 00:00:00 grep mpd
>>>>>>>>
>>>>>>>> Compute Node 4:
>>>>>>>>
>>>>>>>> [enming at enming-f11-pv-hpc-node0004 ~]$ mpdtrace -l
>>>>>>>> enming-f11-pv-hpc-node0004_46914 (192.168.1.251)
>>>>>>>> enming-f11-pv-hpc-node0003_36478 (192.168.1.252)
>>>>>>>> enming-f11-pv-hpc-node0002_42012 (192.168.1.253)
>>>>>>>> enming-f11-pv-hpc-node0006_55525 (192.168.1.249)
>>>>>>>> enming-f11-pv-hpc-node0001_34188 (192.168.1.254)
>>>>>>>> enming-f11-pv-hpc-node0005_39315 (192.168.1.250)
>>>>>>>> [enming at enming-f11-pv-hpc-node0004 ~]$ ps -ef | grep mpd
>>>>>>>> enming 1432 1 0 21:44 ? 00:00:00 python2.6
>>>>>>>> /home/enming/mpich2-install/bin/mpd.py -h enming-f11-pv-hpc-node0001 -p
>>>>>>>> 34188 --ncpus=1 -e -d
>>>>>>>> enming 1482 1437 0 21:47 pts/0 00:00:00 grep mpd
>>>>>>>>
>>>>>>>> Compute Node 5:
>>>>>>>>
>>>>>>>> [enming at enming-f11-pv-hpc-node0005 ~]$ mpdtrace -l
>>>>>>>> enming-f11-pv-hpc-node0005_39315 (192.168.1.250)
>>>>>>>> enming-f11-pv-hpc-node0004_46914 (192.168.1.251)
>>>>>>>> enming-f11-pv-hpc-node0003_36478 (192.168.1.252)
>>>>>>>> enming-f11-pv-hpc-node0002_42012 (192.168.1.253)
>>>>>>>> enming-f11-pv-hpc-node0006_55525 (192.168.1.249)
>>>>>>>> enming-f11-pv-hpc-node0001_34188 (192.168.1.254)
>>>>>>>> [enming at enming-f11-pv-hpc-node0005 ~]$ ps -ef | grep mpd
>>>>>>>> enming 1423 1 0 21:44 ? 00:00:00 python2.6
>>>>>>>> /home/enming/mpich2-install/bin/mpd.py -h enming-f11-pv-hpc-node0001 -p
>>>>>>>> 34188 --ncpus=1 -e -d
>>>>>>>> enming 1475 1429 0 21:48 pts/0 00:00:00 grep mpd
>>>>>>>>
>>>>>>>> Compute Node 6:
>>>>>>>>
>>>>>>>> [enming at enming-f11-pv-hpc-node0006 ~]$ mpdtrace -l
>>>>>>>> enming-f11-pv-hpc-node0006_55525 (192.168.1.249)
>>>>>>>> enming-f11-pv-hpc-node0001_34188 (192.168.1.254)
>>>>>>>> enming-f11-pv-hpc-node0005_39315 (192.168.1.250)
>>>>>>>> enming-f11-pv-hpc-node0004_46914 (192.168.1.251)
>>>>>>>> enming-f11-pv-hpc-node0003_36478 (192.168.1.252)
>>>>>>>> enming-f11-pv-hpc-node0002_42012 (192.168.1.253)
>>>>>>>> [enming at enming-f11-pv-hpc-node0006 ~]$ ps -ef | grep mpd
>>>>>>>> enming 1427 1 0 21:44 ? 00:00:00 python2.6
>>>>>>>> /home/enming/mpich2-install/bin/mpd.py -h enming-f11-pv-hpc-node0002 -p
>>>>>>>> 42012 --ncpus=1 -e -d
>>>>>>>> enming 1477 1432 0 21:49 pts/0 00:00:00 grep mpd
>>>>>>>>
>>>>>>>> =================================================
>>>>>>>>
>>>>>>>> Should I increase the value of MPIEXEC_RECV_TIMEOUT in the
>>>>>>>> mpiexec.py file or should I change the communication method to sock?
>>>>>>>>
>>>>>>>> MPIEXEC 392 error says no msg recvd from mpd when expecting ack of
>>>>>>>> request. So I am thinking that it could be taking very very long to receive
>>>>>>>> acknowledgement of request while the MPIEXEC_RECV_TIMEOUT value is too low.
>>>>>>>> Hence that causes the mpiexec 392 error in my case. I am using a virtual
>>>>>>>> network adapter and not physical Gigabit network adapter.
>>>>>>>>
>>>>>>>> =================================================
>>>>>>>>
>>>>>>>> [root at enming-f11-pv-hpc-node0001 ~]# cat /proc/cpuinfo
>>>>>>>> processor : 0
>>>>>>>> vendor_id : GenuineIntel
>>>>>>>> cpu family : 6
>>>>>>>> model : 23
>>>>>>>> model name : Pentium(R) Dual-Core CPU E6300 @ 2.80GHz
>>>>>>>> stepping : 10
>>>>>>>> cpu MHz : 2800.098
>>>>>>>> cache size : 2048 KB
>>>>>>>> fpu : yes
>>>>>>>> fpu_exception : yes
>>>>>>>> cpuid level : 13
>>>>>>>> wp : yes
>>>>>>>> flags : fpu de tsc msr pae cx8 cmov pat clflush mmx fxsr sse
>>>>>>>> sse2 ss ht syscall nx lm constant_tsc rep_good pni ssse3 cx16 hypervisor
>>>>>>>> lahf_lm
>>>>>>>> bogomips : 5600.19
>>>>>>>> clflush size : 64
>>>>>>>> cache_alignment : 64
>>>>>>>> address sizes : 36 bits physical, 48 bits virtual
>>>>>>>> power management:
>>>>>>>>
>>>>>>>> processor : 1
>>>>>>>> vendor_id : GenuineIntel
>>>>>>>> cpu family : 6
>>>>>>>> model : 23
>>>>>>>> model name : Pentium(R) Dual-Core CPU E6300 @ 2.80GHz
>>>>>>>> stepping : 10
>>>>>>>> cpu MHz : 2800.098
>>>>>>>> cache size : 2048 KB
>>>>>>>> fpu : yes
>>>>>>>> fpu_exception : yes
>>>>>>>> cpuid level : 13
>>>>>>>> wp : yes
>>>>>>>> flags : fpu de tsc msr pae cx8 cmov pat clflush mmx fxsr sse
>>>>>>>> sse2 ss ht syscall nx lm constant_tsc rep_good pni ssse3 cx16 hypervisor
>>>>>>>> lahf_lm
>>>>>>>> bogomips : 5600.19
>>>>>>>> clflush size : 64
>>>>>>>> cache_alignment : 64
>>>>>>>> address sizes : 36 bits physical, 48 bits virtual
>>>>>>>> power management:
>>>>>>>>
>>>>>>>> [root at enming-f11-pv-hpc-node0001 ~]# cat /proc/meminfo
>>>>>>>> MemTotal: 532796 kB
>>>>>>>> MemFree: 386156 kB
>>>>>>>> Buffers: 12904 kB
>>>>>>>> Cached: 48864 kB
>>>>>>>> SwapCached: 0 kB
>>>>>>>> Active: 34884 kB
>>>>>>>> Inactive: 43252 kB
>>>>>>>> Active(anon): 16504 kB
>>>>>>>> Inactive(anon): 0 kB
>>>>>>>> Active(file): 18380 kB
>>>>>>>> Inactive(file): 43252 kB
>>>>>>>> Unevictable: 0 kB
>>>>>>>> Mlocked: 0 kB
>>>>>>>> SwapTotal: 2195448 kB
>>>>>>>> SwapFree: 2195448 kB
>>>>>>>> Dirty: 12 kB
>>>>>>>> Writeback: 0 kB
>>>>>>>> AnonPages: 16444 kB
>>>>>>>> Mapped: 8864 kB
>>>>>>>> Slab: 10528 kB
>>>>>>>> SReclaimable: 4668 kB
>>>>>>>> SUnreclaim: 5860 kB
>>>>>>>> PageTables: 2996 kB
>>>>>>>> NFS_Unstable: 0 kB
>>>>>>>> Bounce: 0 kB
>>>>>>>> WritebackTmp: 0 kB
>>>>>>>> CommitLimit: 2461844 kB
>>>>>>>> Committed_AS: 73024 kB
>>>>>>>> VmallocTotal: 34359738367 kB
>>>>>>>> VmallocUsed: 6332 kB
>>>>>>>> VmallocChunk: 34359724899 kB
>>>>>>>> HugePages_Total: 0
>>>>>>>> HugePages_Free: 0
>>>>>>>> HugePages_Rsvd: 0
>>>>>>>> HugePages_Surp: 0
>>>>>>>> Hugepagesize: 2048 kB
>>>>>>>> DirectMap4k: 524288 kB
>>>>>>>> DirectMap2M: 0 kB
>>>>>>>> [root at enming-f11-pv-hpc-node0001 ~]# lspci -v
>>>>>>>> [root at enming-f11-pv-hpc-node0001 ~]# lsusb
>>>>>>>> [root at enming-f11-pv-hpc-node0001 ~]# ifconfig eth0
>>>>>>>> eth0 Link encap:Ethernet HWaddr 00:16:3E:69:E9:11
>>>>>>>> inet addr:192.168.1.254 Bcast:192.168.1.255
>>>>>>>> Mask:255.255.255.0
>>>>>>>> inet6 addr: fe80::216:3eff:fe69:e911/64 Scope:Link
>>>>>>>> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
>>>>>>>> RX packets:5518 errors:26 dropped:0 overruns:0 frame:0
>>>>>>>> TX packets:4832 errors:0 dropped:0 overruns:0 carrier:0
>>>>>>>> collisions:0 txqueuelen:1000
>>>>>>>> RX bytes:872864 (852.4 KiB) TX bytes:3972981 (3.7 MiB)
>>>>>>>> Interrupt:17
>>>>>>>>
>>>>>>>> [root at enming-f11-pv-hpc-node0001 ~]# ethtool eth0
>>>>>>>> Settings for eth0:
>>>>>>>> Link detected: yes
>>>>>>>> [root at enming-f11-pv-hpc-node0001 ~]# netstat -i
>>>>>>>> Kernel Interface table
>>>>>>>> Iface MTU Met RX-OK RX-ERR RX-DRP RX-OVR TX-OK TX-ERR
>>>>>>>> TX-DRP TX-OVR Flg
>>>>>>>> eth0 1500 0 5589 26 0 0 4875
>>>>>>>> 0 0 0 BMRU
>>>>>>>> lo 16436 0 127 0 0 0 127
>>>>>>>> 0 0 0 LRU
>>>>>>>> [root at enming-f11-pv-hpc-node0001 ~]# uname -a
>>>>>>>> Linux enming-f11-pv-hpc-node0001 2.6.29.4-167.fc11.x86_64 #1 SMP Wed
>>>>>>>> May 27 17:27:08 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux
>>>>>>>> You have new mail in /var/spool/mail/root
>>>>>>>> [root at enming-f11-pv-hpc-node0001 ~]# cat /etc/redhat-release
>>>>>>>> Fedora release 11 (Leonidas)
>>>>>>>>
>>>>>>>> =================================================
>>>>>>>>
>>>>>>>> Please advise.
>>>>>>>>
>>>>>>>>
>>>>>>>> Thank you.
>>>>>>>>
>>>>>>>> --
>>>>>>>> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics)
>>>>>>>> BEng(Hons)(Mechanical Engineering)
>>>>>>>> Alma Maters:
>>>>>>>> (1) Singapore Polytechnic
>>>>>>>> (2) National University of Singapore
>>>>>>>> My blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
>>>>>>>> My Youtube videos: http://www.youtube.com/user/enmingteo
>>>>>>>> Email: space.time.universe at gmail.com
>>>>>>>> MSN: teoenming at hotmail.com
>>>>>>>> Mobile Phone (SingTel): +65-9648-9798
>>>>>>>> Mobile Phone (Starhub Prepaid): +65-8369-2618
>>>>>>>> Age: 31 (as at 30 Oct 2009)
>>>>>>>> Height: 1.78 meters
>>>>>>>> Race: Chinese
>>>>>>>> Dialect: Hokkien
>>>>>>>> Street: Bedok Reservoir Road
>>>>>>>> Country: Singapore
>>>>>>>>
>>>>>>>> On Fri, Oct 30, 2009 at 11:55 AM, Mr. Teo En Ming (Zhang Enming) <
>>>>>>>> space.time.universe at gmail.com> wrote:
>>>>>>>>
>>>>>>>>> Hi,
>>>>>>>>>
>>>>>>>>> I am getting the same mpiexec 392 error message as Kenneth
>>>>>>>>> Yoshimoto from the San Diego Supercomputer Center. His mpich-discuss mailing
>>>>>>>>> list topic URL is
>>>>>>>>> http://lists.mcs.anl.gov/pipermail/mpich-discuss/2009-October/005882.html
>>>>>>>>>
>>>>>>>>> I have actually already performed the 2-node mpdcheck utility test
>>>>>>>>> as described in Appendix A.1 of the MPICH2 installation guide. I could start
>>>>>>>>> the ring of mpd on the 2-node test scenario using mpdboot successfully as
>>>>>>>>> well.
>>>>>>>>>
>>>>>>>>> 薛正华 (ID: zhxue123) from China reported solving the mpiexec 392
>>>>>>>>> error. According to 薛正华, the cause of the mpiexec 392 error is the absence
>>>>>>>>> of high performance network in his environment. He had changed the default
>>>>>>>>> communication method from nemesis to ssm and also increased the value of
>>>>>>>>> MPIEXEC_RECV_TIMEOUT in the mpiexec.py python source code. The URL of his
>>>>>>>>> report is at
>>>>>>>>> http://blog.csdn.net/zhxue123/archive/2009/08/22/4473089.aspx
>>>>>>>>>
>>>>>>>>> Could this be my problem also?
>>>>>>>>>
>>>>>>>>> Thank you.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics)
>>>>>>>>> BEng(Hons)(Mechanical Engineering)
>>>>>>>>> Alma Maters:
>>>>>>>>> (1) Singapore Polytechnic
>>>>>>>>> (2) National University of Singapore
>>>>>>>>> My blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
>>>>>>>>> My Youtube videos: http://www.youtube.com/user/enmingteo
>>>>>>>>> Email: space.time.universe at gmail.com
>>>>>>>>> MSN: teoenming at hotmail.com
>>>>>>>>> Mobile Phone (SingTel): +65-9648-9798
>>>>>>>>> Mobile Phone (Starhub Prepaid): +65-8369-2618
>>>>>>>>> Age: 31 (as at 30 Oct 2009)
>>>>>>>>> Height: 1.78 meters
>>>>>>>>> Race: Chinese
>>>>>>>>> Dialect: Hokkien
>>>>>>>>> Street: Bedok Reservoir Road
>>>>>>>>> Country: Singapore
>>>>>>>>>
>>>>>>>>> On Fri, Oct 30, 2009 at 11:09 AM, Rajeev Thakur <
>>>>>>>>> thakur at mcs.anl.gov> wrote:
>>>>>>>>>
>>>>>>>>>> You need to do the mpdcheck tests with every pair of compute
>>>>>>>>>> nodes. Or to isolate the problem, try running on a smaller set of nodes
>>>>>>>>>> first and increase it one at a time until it fails.
>>>>>>>>>>
>>>>>>>>>> Rajeev
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> ------------------------------
>>>>>>>>>> *From:* mpich-discuss-bounces at mcs.anl.gov [mailto:
>>>>>>>>>> mpich-discuss-bounces at mcs.anl.gov] *On Behalf Of *Mr. Teo En Ming
>>>>>>>>>> (Zhang Enming)
>>>>>>>>>> *Sent:* Thursday, October 29, 2009 2:35 PM
>>>>>>>>>> *To:* mpich-discuss at mcs.anl.gov
>>>>>>>>>> *Subject:* [mpich-discuss] (mpiexec 392): no msg recvd from mpd
>>>>>>>>>> when expectingack of request
>>>>>>>>>>
>>>>>>>>>> Hi,
>>>>>>>>>>
>>>>>>>>>> I have just installed MPICH2 in my Xen-based virtual machines.
>>>>>>>>>>
>>>>>>>>>> My hardware configuration is as follows:
>>>>>>>>>>
>>>>>>>>>> Processor: Intel Pentium Dual Core E6300 @ 2.8 GHz
>>>>>>>>>> Motherboard: Intel Desktop Board DQ45CB BIOS 0093
>>>>>>>>>> Memory: 4X 2GB Kingston DDR2-800 CL5
>>>>>>>>>>
>>>>>>>>>> My software configuration is as follows:
>>>>>>>>>>
>>>>>>>>>> Xen Hypervisor / Virtual Machine Monitor Version: 3.5-unstable
>>>>>>>>>> Jeremy Fitzhardinge's pv-ops dom0 kernel: 2.6.31.4
>>>>>>>>>> Host Operating System: Fedora Linux 11 x86-64 (SELinux disabled)
>>>>>>>>>> Guest Operating Systems: Fedora Linux 11 x86-64 paravirtualized
>>>>>>>>>> (PV) domU guests (SELinux disabled)
>>>>>>>>>>
>>>>>>>>>> I have successfully configured, built and installed MPICH2 in a
>>>>>>>>>> F11 PV guest OS master compute node 1 with NFS server (MPICH2 bin
>>>>>>>>>> subdirectory exported). The rest of the 5 compute nodes have access to the
>>>>>>>>>> MPICH2 binaries by mounting NFS share from node 1. Please see attached
>>>>>>>>>> c.txt, m.txt and mi.txt. With Xen virtualization, I have created 6 F11 linux
>>>>>>>>>> PV guests to simulate 6 HPC compute nodes. The network adapter (NIC) in each
>>>>>>>>>> guest OS is virtual. The Xen networking type is bridged. Running "lspci -v"
>>>>>>>>>> and lsusb in each guest OS does not show up anything.
>>>>>>>>>>
>>>>>>>>>> According to Appendix A troubleshooting section of the MPICH2
>>>>>>>>>> install guide, I have verified that the 2-node test scenario with "mpdcheck
>>>>>>>>>> -s" and "mpdcheck -c" is working. The 2 nodes each acting as server and
>>>>>>>>>> client respectively can communicate with each other without problems. Both
>>>>>>>>>> nodes can communicate with each other in server and client modes
>>>>>>>>>> respectively. I have also tested mpdboot with the 2-node scenario and the
>>>>>>>>>> ring of mpd is working.
>>>>>>>>>>
>>>>>>>>>> After the troubleshooting process, I have successfully created a
>>>>>>>>>> ring of mpd involving 6 compute nodes. "mpdtrace -l" successfully lists all
>>>>>>>>>> the 6 nodes. However, when I want to run a job with mpiexec, it gives me the
>>>>>>>>>> following error:
>>>>>>>>>>
>>>>>>>>>> [enming at enming-f11-pv-hpc-node0001 ~]$ mpiexec -n 2 examples/cpi
>>>>>>>>>> mpiexec_enming-f11-pv-hpc-node0001 (mpiexec 392): no msg recvd
>>>>>>>>>> from mpd when expecting ack of request
>>>>>>>>>>
>>>>>>>>>> I have also tried starting the mpd ring with the root user but I
>>>>>>>>>> still encounter the same error above.
>>>>>>>>>>
>>>>>>>>>> Thank you.
>>>>>>>>>>
>>>>>>>>>> PS. config.log is also attached.
>>>>>>>>>>
>>>>>>>>>> --
>>>>>>>>>> Mr. Teo En Ming (Zhang Enming) Dip(Mechatronics)
>>>>>>>>>> BEng(Hons)(Mechanical Engineering)
>>>>>>>>>> Alma Maters:
>>>>>>>>>> (1) Singapore Polytechnic
>>>>>>>>>> (2) National University of Singapore
>>>>>>>>>> My blog URL: http://teo-en-ming-aka-zhang-enming.blogspot.com
>>>>>>>>>> My Youtube videos: http://www.youtube.com/user/enmingteo
>>>>>>>>>> Email: space.time.universe at gmail.com
>>>>>>>>>> MSN: teoenming at hotmail.com
>>>>>>>>>> Mobile Phone (SingTel): +65-9648-9798
>>>>>>>>>> Mobile Phone (Starhub Prepaid): +65-8369-2618
>>>>>>>>>> Age: 31 (as at 30 Oct 2009)
>>>>>>>>>> Height: 1.78 meters
>>>>>>>>>> Race: Chinese
>>>>>>>>>> Dialect: Hokkien
>>>>>>>>>> Street: Bedok Reservoir Road
>>>>>>>>>> Country: Singapore
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> _______________________________________________
>>>>>>>>>> mpich-discuss mailing list
>>>>>>>>>>
>>>>>>>>>> mpich-discuss at mcs.anl.gov
>>>>>>>>>> https://lists.mcs.anl.gov/mailman/listinfo/mpich-discuss
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>
>
>
>
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