ONE_REAL_WORLD Telegram 5096
一个存在的世界
https://chipsandcheese.com/2024/09/15/discussing-amds-zen-5-at-hot-chips-2024/
1. 每个线程只能用一个 decode cluster,主要的考虑是乱序不好处理,需要跑很高的频率以及有 Op Cache 兜底,未来可能会加上
2. Op Cache 每个 entry 可以存更多信息,所以即使 entry 数比 Zen 4 少,实际对应的指令数可能更大
3. Fetch+Decode 和 Op Cache 可以同时工作,但没讲如何同时工作
4. 每个线程可以用到完整的 2 fetch pipeline,但是会卡在 decode 上



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1. 每个线程只能用一个 decode cluster,主要的考虑是乱序不好处理,需要跑很高的频率以及有 Op Cache 兜底,未来可能会加上
2. Op Cache 每个 entry 可以存更多信息,所以即使 entry 数比 Zen 4 少,实际对应的指令数可能更大
3. Fetch+Decode 和 Op Cache 可以同时工作,但没讲如何同时工作
4. 每个线程可以用到完整的 2 fetch pipeline,但是会卡在 decode 上

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