VT_2010_SPMD
Parallel MATLAB
Single Program Multiple Data

These slides are part of the presentation materials for a lecture on parallel MATLAB and the SPMD command. The presentation included information about running programs on Virginia Tech's Ithaca cluster. The lecture was given 3pm - 4pm, Friday, 25 June 2010, in room 3060, Torgersen Hall.

A PDF version is available as ../../presentations/vt_2010_spmd.pdf.

Some information for those interested in attending the lecture is included in vt_2010_spmd.txt.

The files used for this presentation include

• cg_it.m, carries out the conjugate gradient iteration;
• cg_spmd.m, uses CG_IT to seek a solution of an eigenvalue problem;
• channel.png, an image of a 1x1x3 channel, divided into tetrahedral elements.
• configuration.png, a menu that displays some properties of a configuration.
• fem2d_heat_steady.png, a surface plot of the solution to a steady heat equation in 2D.
• fem2d_heat_steady_grid.png, a schematic of a very small finite element grid divided among parallel workers.
• filter_rgb.png, illustrates the filtering of noise from an image.
• heat_equation.png, illustrates how the grid for the 2D heat equation might be divided into strips, meaning that the 5 point stencil might need information from another strip.
• image_comments.m, a MATLAB function to do image filtering, with comments.
• image_nocomments.m, a MATLAB function to do image filtering, with no comments.
• jigsaw.png, an image of jigsaw pieces, suggesting that the task of finding edge pieces is easy to do in parallel.
• prime_fun.m, a MATLAB function to seek prime numbers.
• prime_script.m, a MATLAB script to call prime_fun.
• quad_fun.m, a MATLAB function to estimate an integral.
• step000.png, the initial data for the heat equation.
• step010.png, the data for the heat equation after 10 steps.
• step020.png, the data for the heat equation after 20 steps.
• step040.png, the data for the heat equation after 40 steps.
• step080.png, the data for the heat equation after 80 steps.
• surfsup.m, a MATLAB function to filter the surfsup image.
• surfsup.png, an image to be filtered.
• surfsup2_summary.png, compares filtering on the client and in parallel, after messages were used.
• surfsup_filters_spmd.png, an image filtered in parallel, but without messaging.
• surfsup_summary.png, compares filtering on the client and in parallel, with no messages allowed between parallel workers.
• vt_2010_spmd.tex, "Parallel MATLAB: SPMD and Message Passing Programming".
• vt_logo.pdf, a logo.

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