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Regarding that extremetech benchmark: how can you not normalize to same node size if you are interested in the ISA? Shouldn't any ISA at 22nm basically be more
by rixed 9y ago
Regarding that extremetech benchmark: how can you not normalize to same node size if you are interested in the ISA?
Shouldn't any ISA at 22nm basically be more power efficient than one at 90nm?
- userbinator 9y agoThey do --- normalise to 1.5GHz at 45nm. If anything, that only makes those CPUs > 1.5GHz look worse and those < 1.5GHz look better, due to memory subsystem effects (which are nonlinear and dependent on details of the implementation, so I'm pretty sure they did a linear scaling); that fact is well known in the overclocking community, where e.g. a 20% increase in core clock almost always means less than 20% improvement in benchmarks. The full paper is here: https://research.cs.wisc.edu/vertical/papers/2013/hpca13-isa-power-struggles.pdf https://research.cs.wisc.edu/vertical/papers/2013/hpca13-isa...