This is a plot of wall time in seconds vs number of processors. There are two curves, one for the 8.2 MB dataset and one for the 57 MB dataset. The curve for the 8.2 MB dataset starts at a wall time of about 0.25 for 1 processor, dips down to about 0.15 for 4 processors, climbs to 0.5 for 8 processors, then steadily decreases to about 0.15 for 40 or more processors. The curve for the 57 MB dataset starts at a wall time of about 2.0 for 1 processor, dips down to about 1.25 for 4 processors, climbs to 3.0 for 8 processors, steadily decreases to about 0.6 for 50 processors, then increases to 0.8 for 60 processors.