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4.3 Modified Amdahl's Law     continued...

In particular, GAMTEB exhibits many ``standard'' aspects of Monte Carlo simulations, so this exercise should yield representative values for these two parameters. The results were:

Additionally, we independently verified these numbers using Cray's hardware performance monitor (hpm). Ergo, we conclude that Monte Carlo programs may be very highly vectorized (), with about a 25% penalty due to data motion. For Cray architectures, the speedup that results exceeds 9. This region of the parameter space is shown shaded in Figure 21.