HPCx performance on the granular chute flow benchmark

Processors: 1 8 64 512
Fixed CPU secs: 2.04 0.235 0.0494 0.0292
Fixed || Efficiency: 100% 109% 64.5% 13.6%
Scaled CPU secs: 2.04 2.05 2.92 3.11
Scaled || Efficiency: 100% 99.5% 69.9% 65.6%