Author: Frank E. Oldham
Date: 14:04:49 08/20/04
On my Powerbook I can selectively enable/disable caches. Here's the bench results for crafty19.15. 1 GHz G4 (7455) with L1 cache = 32KB + 32Kb L2 cache (fast) = 256KB L3 cache (slow) = 1MB crafty19.15 compiled with IBM xlc compiler (fastest G4 32-bit binary) L2 L3 bench nps ------------------------- + + 472948 + - 449448 - + 374928 - - 190424 From these numbers it looks like an increase from 256K to 512K of L2 cache would probably speed up crafty by 10% or so. Note -- I recall that in making the NUMA changes for his Opteron machine, Bob improved crafty's overall cache performance quite a bit. I think this was during the progression from around 19.05 up to 19.10. Bench for the Mac G4 & G5 sped up 5-10% alone just from these "data layout" changes. Frank
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