Return to http://www.soton.ac.uk/~sjc/raspberrypi

View video at: http://www.youtube.com/watch?v=Jq5nrHz9I94

Prof Simon Cox

Computational Engineering and Design Research Group

Faculty of Engineering and the Environment

University of Southampton, SO17 1BJ, UK.

V0.2: 8th September 2012

V0.3: 30th November 2012 [Updated with less direct linking to MPICH2 downloads]

V0.4: 9th January 2013 [Updated step 33]

First steps to get machine up

1. Get image from

http://www.raspberrypi.org/downloads

I originally used: 2012-08-16-wheezy-raspbian.zip

Updated 30/11/12: 2012-10-28-wheezy-raspbian.zip

My advice is to to check the downloads page on raspberrypi.org and use the latest version.

2. Use win32 disk imager to put image onto an SD Card (or on a Mac e.g. Disk Utility/ dd)

http://www.softpedia.com/get/CD-DVD-Tools/Data-CD-DVD-Burning/Win32-Disk-Imager.shtml

You will use the Write option to put the image from the disk to your card

3. Boot on Pi

4. Expand image to fill card using the option on screen when you first boot. If you dont do this on first boot, then you need to use

$ sudo raspi-config

http://elinux.org/RPi_raspi-config

5. Log in and change the password

http://www.simonthepiman.com/beginners_guide_change_my_default_password.php

$ passwd

6. Log out and check that you typed it all OK (!)

$ exit

7. Log back in again with your new password

Building MPI so we can run code on multiple nodes

8. Refresh your list of packages in your cache

$ sudo apt-get update

9. Just doing this out of habit, but note not doing any more than just getting the list (upgrade is via sudo apt-get upgrade).

10. Get Fortran after all what is scientific programming without Fortran being a possibility?

$ sudo apt-get install gfortran

11. Read about MPI on the Pi. This is an excellent post to read just to show you are going to make it by the end, but dont type or get anything just yet- we are going to build everything ourselves:

http://westcoastlabs.blogspot.co.uk/2012/06/parallel-processing-on-pi-bramble.html

Note there are a few things to note here

a) Since we put Fortran in we are good to go without excluding anything

b) The packages here are for armel and we need armhf in this case so we are going to build MPI ourselves

12. Read a bit more before you begin:

http://www.mcs.anl.gov/research/projects/mpich2/documentation/files/mpich2-1.4.1-installguide.pdf

Note: As the version of MPICH2 updates, you are better to go to:

Guides

and get the latest installers Guide.

We are going to follow the steps from 2.2 (from the Quick Start Section) in the guide.

13. Make a directory to put the sources in

$ mkdir /home/pi/mpich2

$ cd ~/mpich2

14. Get MPI sources from Argonne.

$ wget http://www.mcs.anl.gov/research/projects/mpich2/downloads/tarballs/1.4.1p1/mpich2-1.4.1p1.tar.gz

[Note that as the MPI source updates, you can navigate to:

http://www.mpich.org/downloads/ to get the latest stable release version for MPICH2]

15. Unpack them.

$ tar xfz mpich2-1.4.1p1.tar.gz

[Note: You will need to update this as the version of MPICH2 increments]

16. Make yourself a place to put the compiled stuff this will also make it easier to figure out what you have put in new on your system. Also you may end up building this a few times

$ sudo mkdir /home/rpimpi/

$ sudo mkdir /home/rpimpi/mpich2-install

[I just chose the rpimpi to replace the you in the Argonne guide and I did the directory creation in two steps]

17. Make a build directory (so we keep the source directory clean of build things)

mkdir /home/pi/mpich_build

18. Change to the BUILD directory

$ cd /home/pi/mpich_build

19. Now we are going to configure the build

$ sudo /home/pi/mpich2/mpich2-1.4.1p1/configure -prefix=/home/rpimpi/mpich2-install

[Note: You will need to update this as the version of MPICH2 increments]

Make a cup of tea

20. Make the files

$ sudo make

Make another cup of tea

21. Install the files

$ sudo make install

Make another cup of tea it will finish

22. Add the place that you put the install to your path

$ export PATH=$PATH:/home/rpimpi/mpich2-install/bin

Note to permanently put this on the path you will need to edit .profile

$nano ~/.profile

and add at the bottom these two lines:

# Add MPI to path

PATH="$PATH:/home/rpimpi/mpich2-install/bin"

23. Check whether things did install or not

$ which mpicc

$ which mpiexec

24. Change directory back to home and create somewhere to do your tests

$ cd ~

$ mkdir mpi_testing

$ cd mpi_testing

25. Now we can test whether MPI works for you on a single node

mpiexec -f machinefile -n hostname

where machinefile contains a list of IP addresses (in this case just one) for the machines

a) Get your IP address

$ ifconfig

b) Put this into a single file called machinefile

26. $ nano machinefile

Add this line:

192.168.1.161

[or whatever your IP address was]

27. If you use

Follow this link:

Raspberry Pi Supercomputer Guide Steps