[Xen-users] Using Xen Virtualization Environment for Development and Testing of Supercomputing and High Performance Computing (HPC) Cluster MPICH2 MPI-2 Applications

["Mr. Teo En Ming (Zhang Enming)" <space.time.universe@xxxxxxxxx>]

Dear All,

I have created a virtual high performance computing (HPC) cluster of 6 compute nodes with MPICH2 using Xen-based Fedora 11 Linux 64-bit paravirtualized (PV) domU guests. Dom0 is Fedora 11 Linux 64-bit. My Intel Desktop Board DQ45CB has a single onboard Gigabit LAN network adapter.

I am able to bring up the ring of mpd on the set of 6 compute nodes. However, I am consistently encountering the "(mpiexec 392): no msg recvd from mpd when	expecting ack of request" error.

After much troubleshooting, I have found that there are Receive Errors (RX-ERR) in the virtual network interface eth0 of all the six compute nodes. All the 6 compute nodes are identical F11 linux 64-bit PV virtual machines.

Here is my PV guest configuration for node 1:

[enming@fedora11-x86-64-host xen]$ cat enming-f11-pv-hpc-node0001
name="enming-f11-pv-hpc-node0001"
memory=512
disk = ['phy:/dev/virtualmachines/f11-pv-hpc-node0001,xvda,w' ]
vif = [ 'mac=00:16:3E:69:E9:11,bridge=eth0' ]
vfb = [ 'vnc=1,vncunused=1,vncdisplay=0,vnclisten=127.0.0.1,vncpasswd=' ]
vncconsole=1
bootloader = "/usr/bin/pygrub"
#kernel = "/home/enming/fedora11/vmlinuz"
#ramdisk = "/home/enming/fedora11/initrd.img"
vcpus=2
>>
Will there be any problems with Xen networking for MPICH2 applications? Or it's just a fine-tuning exercise for Xen networking? I am using PV guests because PV guests have much higher performance than HVM guests.

Here are my mpich-discuss mailing list threads:

http://lists.mcs.anl.gov/pipermail/mpich-discuss/2009-October/005883.html

http://lists.mcs.anl.gov/pipermail/mpich-discuss/2009-October/005887.html

http://lists.mcs.anl.gov/pipermail/mpich-discuss/2009-October/005889.html

http://lists.mcs.anl.gov/pipermail/mpich-discuss/2009-October/005890.html

http://lists.mcs.anl.gov/pipermail/mpich-discuss/2009-October/005891.html

Please advise on the RX-ERR.

Thank you very much.

-- 
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@xxxxxxxxx
MSN: teoenming@xxxxxxxxxxx
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
_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users