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<p><font face="serif">Sometimes it is hard to make out where the
maximum is on the 3D plots. It is possible to also add a
contour diagram in the x-y plane to help with these
visualizations and determinations. I have included a slightly
modified version of the file I sent you before (that I will
place on the class website) that includes the projection of the
megaflops onto the x-y axis.</font></p>
<p>set contour<br>
set cntrparam levels auto 20<br>
set title "Hybrid MPI/OpenMP Benchmark\nN=3000"<br>
set xlabel "Threads"<br>
set ylabel "Nodes"<br>
set zlabel "Megaflops"<br>
set dgrid3d 20,22<br>
set hidden3d<br>
set noclabel<br>
set key off<br>
show contour<br>
splot [1:20] [1:22] "clustertune.dat" u 1:2:3 with lines<br>
set output "plot.ps"<br>
set terminal postscript enhanced color landscape<br>
replot<br>
set output "plot.png"<br>
set terminal png <br>
replot<br>
</p>
<img moz-do-not-send="false"
src="cid:part1.5B120051.4BFBE477@mercer.edu" alt="contoured"
width="640" height="480">
<pre class="moz-signature" cols="72">--
Andrew J. Pounds, Ph.D. (<a class="moz-txt-link-abbreviated" href="mailto:pounds_aj@mercer.edu">pounds_aj@mercer.edu</a>)
Professor of Chemistry and Computer Science
Director of the Computational Science Program
Mercer University, Macon, GA 31207 (478) 301-5627
</pre>
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