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How did AMD Ryzen get 50% faster in two years?

487 points · 206 comments · ibobev

  1. bmenrigh · · focus · HN ↗
    I was recently able to get a workload of mine optimized enough on Zen 5 to hit a sustained 6.0 IPC/core (3.0 / thread) at 5.1 GHz. Seeing the a > 99.8% branch prediction rate and a > 99.99% L2 cache hit rate retiring > 1T instructions every 3 seconds feels amazing.

    Zen5 is incredible when you're able to make the most of it. I’m super excited about Zen6.

    1. adgjlsfhk1 · · focus · HN ↗
      zen5 is really the first CPU of the avx512 era (since it's the first time normal compiler devs have them to play with)
      1. Sharlin · · focus · HN ↗
        And it’s full width for the first time.
        1. adgjlsfhk1 · · focus · HN ↗
          full width doesn't matter. 90% of the AVX512 advantage is 32 registers, masking, and all the other nice features.
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