Új hozzászólás Aktív témák

  • S_x96x_S

    addikt

    válasz fLeSs #48278 üzenetére

    > Csak a képeket nézve a Strix Point a Lunar Lake-hez képest
    > nagyon rosszul áll cache-ben minden szinten

    a cache a latency alacsony tartása miatt van;
    és az alapján már teljesen más következtetésre lehet jutni.

    "Outside the Xe Core, Lunar Lake doubles L2 cache capacity to 8 MB. That’s the biggest L2 cache I’ve seen in a laptop iGPU so far. However, latency has substantially increased over Meteor Lake’s 4 MB L2. Lunar Lake also sees a weird uptick in latency well before the test approaches L2 cache capacity. It’s not address translation latency because testing with a 4 KB stride didn’t show a latency jump until 64 MB, implying a single thread has enough TLB capacity on hand to cover 64 MB."

    "AMD’s Strix Point has a smaller but lower latency L2 cache. Even though the L2 is smaller, Strix Point has a lower latency penalty for accessing DRAM. On Lunar Lake and Meteor Lake, a GPU-side DRAM access has over 400 ns of latency. Strix Point’s iGPU can get data from DRAM in under 250 ns. Lunar Lake has a 8 MB memory side cache placed in front of the memory controller, but I can’t clearly measure its performance characteristics."

    ( via https://chipsandcheese.com/p/lunar-lakes-igpu-debut-of-intels )

Új hozzászólás Aktív témák