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by neilmovva
2535 days ago
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Actually, the L3 cache is also sharded across chiplets, so there's a small (~8MB) local portion of L3 that is fast, while remote slices will have to go over AMD's interdie connection fabric and incur a serious latency penalty. On first gen Epyc/Threadripper, nonlocal L3 hits were almost as slow as DRAM at ~100ns (!). |
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