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Table 2 Runtime of the sequential and parallel parts of task-distributor in the cluster of Raspberry Pi computers when a single one, two, four or eight nodes (processors) are used

From: Parallel image computation in clusters with task-distributor

  Resolution 1st seq. part (s) 2nd seq. part (s) Parallel part (s)
1 node used 200 × 150 0.210 0.204 4.472
400 × 300 0.215 0.202 10.505
800 × 600 0.206 0.194 34.918
1600 × 1200 0.206 0.205 132.840
3200 × 2400 0.242 0.233 609.427
6400 × 4800 0.219 0.468 2434.630
2 nodes used 200 × 150 0.200 0.449 4.628
400 × 300 0.199 0.680 7.603
800 × 600 0.207 1.552 21.167
1600 × 1200 0.217 4.665 73.481
3200 × 2400 0.203 15.243 331.059
6400 × 4800 0.211 152.037 1321.640
4 nodes used 200 × 150 0.198 0.545 4.984
400 × 300 0.207 0.777 7.043
800 × 600 0.203 1.632 14.945
1600 × 1200 0.243 4.625 48.780
3200 × 2400 0.230 15.146 209.375
6400 × 4800 0.219 120.324 821.244
8 nodes used 200 × 150 0.216 0.741 6.115
400 × 300 0.201 1.002 7.422
800 × 600 0.242 1.839 12.727
1600 × 1200 0.204 4.802 32.458
3200 × 2400 0.218 15.543 131.780
6400 × 4800 0.209 120.471 509.707
  1. All values in the table are rounded to three decimal places behind the decimal point