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AMD 公布 Zen 6 CPU 细节
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AMD 披露了 Zen 6 CPU 家族的细节。从表面看,Zen 6 是 Zen 5 的自然演进,核心扩展了乱序执行结构以及其它方面的迭代改进。但深入内部会发现 AMD 对核心的多个方面进行了重构,其改进类似从 Zen 1 到 Zen 2。 Zen 6 分支预测错误开销从 Zen 5 的 3.5-4 纳秒缩短到了 3-3.5 纳秒,降低了分支预测错误延迟。Zen 6 能在 L1 指令缓存内实现每周期处理 2 个分支,指令足迹超出 L1 缓存容量后会降至每周期处理 1 个分支,Zen 6 主要提升了分支目标缓冲器(BTB)的速度而非容量。Zen 6 的分支预测单元精确度接近 Zen 5,执行速度则更快。Zen 5 单线程只能使用一个解码集群,而 Zen 6 提升到了单线程能使用两个解码集群。Zen 6 在整数运算上恢复了 Zen 4 的 NOP(空操作)配对机制,每时钟周期最多可处理 16 ...
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