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RISC-V Boots Linux at SiFive

U54 trails but is competitive with ARM A53
10/4/2017 09:00 AM EDT
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Wilco1
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Re: Perhaps i'm wrong
Wilco1   10/5/2017 6:34:15 PM
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CPU performance cannot be expressed as a single benchmark score. Like Dhrystone, CoreMark scores mostly depend on frequency. You'll get a far more realistic idea of performance from larger benchmarks like Geekbench or SPEC2017. Larger benchmarks require good branch predictors, automatic prefetchers, low latency caches, streaming optimizations, high memory bandwidth etc. This reminds me of the good old StrongARM. It was very small, simple and extremely fast as long as all your code fitted in L1. So it had amazing Dhrystone scores (or CoreMark had it existed back then), but it wasn't very fast when you ran complex applications on it.

HardwIntr
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Perhaps i'm wrong
HardwIntr   10/5/2017 5:32:08 AM
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"A single 64-bit U54 core delivers 1.7 DMIPS/MHz or 2.75 CoreMark/MHz at 1.5 GHz...."

 

2,75 * 4 * 1,5 * 1000 = 16500 ??? Perhaps i'm wrong but in what way is it expected to lag the  QorIQ LS1043A ?

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