Aggregate Speedups for Concurrent or Parallel STREAM on Shared-Memory Multiprocessors John D. McCalpin john@mccalpin.com Revised to: Tue Jan 24 17:13:57 1995 num Speedup ratio Machine cpus Copy Scale Sum Triad --------------- ----- -------- -------- -------- -------- Cray C90 16 15.15 15.03 10.85 10.93 Cray C90 8 7.91 7.95 6.49 6.66 Cray C90 4 3.96 3.99 3.69 3.69 Cray C90 2 1.99 2.00 1.94 1.92 Cray C90 1 1.00 1.00 1.00 1.00 Cray Y/MP 8 7.95 7.95 7.70 7.89 Cray Y/MP 4 3.99 3.99 3.99 4.08 Cray Y/MP 1 1.00 1.00 1.00 1.00 Cray J90 4 3.27 3.41 3.47 3.41 Cray J90 2 1.90 1.87 1.95 1.91 Cray J90 1 1.00 1.00 1.00 1.00 Cray EL-98 8 5.40 5.29 4.43 4.96 Cray EL-98 4 3.58 3.59 3.61 4.10 Cray EL-98 2 1.89 1.91 1.96 2.26 Cray EL-98 1 1.00 1.00 1.00 1.00 Convex C3420 2 cpu 2 1.63 1.58 1.69 1.68 Convex C3410 1 cpu 1 1.00 1.00 1.00 1.00 Convex C3220 2 cpu 2 1.86 1.86 1.86 1.86 Convex C3210 1 cpu 1 1.00 1.00 1.00 1.00 Stardent P3 3 2.75 3.16 3.16 2.85 Stardent P3 1 1.00 1.00 1.00 1.00 SGI Power Challenge 8 5.31 4.83 4.97 5.63 SGI Power Challenge 6 4.59 4.49 4.53 4.86 SGI Power Challenge 4 3.53 3.40 3.48 3.59 SGI Power Challenge 2 1.89 1.86 1.90 1.91 SGI Power Challenge 1 1.00 1.00 1.00 1.00 SGI Challenge 150MHz 8 7.10 7.03 7.33 7.28 SGI Challenge 150MHz 4 3.91 3.73 3.90 3.79 SGI Challenge 150MHz 1 1.00 1.00 1.00 1.00 Sun SparcCenter 2000 6 4.92 4.71 4.77 4.76 Sun SparcCenter 2000 4 3.66 3.55 3.53 3.58 Sun SparcCenter 2000 2 1.99 1.93 1.96 1.95 Sun SparcCenter 2000 1 1.00 1.00 1.00 1.00 Sun SC2000, autopar 8 2.96 2.83 3.22 3.70 Sun SC2000, autopar 7 3.01 3.16 3.50 3.08 Sun SC2000, autopar 6 3.04 3.52 4.10 3.28 Sun SC2000, autopar 5 3.61 3.61 3.83 3.89 Sun SC2000, autopar 4 3.19 3.23 3.36 3.42 Sun SC2000, autopar 3 2.62 2.62 2.75 2.78 Sun SC2000, autopar 2 1.89 1.89 1.95 1.98 Sun SC2000, autopar 1 1.00 1.00 1.00 1.00 DEC 7000/640 4 2.86 2.81 2.94 3.06 DEC 7000/640 2 1.79 1.81 1.82 1.81 DEC 7000/640 1 1.00 1.00 1.00 1.00 DEC 2100 A500 2 1.68 1.65 1.64 1.61 DEC 2100 A500 1 1.00 1.00 1.00 1.00