2077 1080p路径追踪RDNA 3 vs 4，后者用上新的traversal指令之后RT shader寄存器压力骤降（240 -> 96），occupation也直接满了（6/16 -> 16/16）。2077的RT shader不算特别复杂，因此没有观察到使用动态寄存器(s_alloc_vgpr)。在黑神话悟空里则有观察到5-20%的wave时间被用于循环等待动态分配。

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2077 1080p路径追踪RDNA 3 vs 4，后者用上新的traversal指令之后RT shader寄存器压力骤降（240 -> 96），occupation也直接满了（6/16 -> 16/16）。

2077的RT shader不算特别复杂，因此没有观察到使用动态寄存器(s_alloc_vgpr)。在黑神话悟空里则有观察到5-20%的wave时间被用于循环等待动态分配。

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Create: 2025-03-18
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Date: 2025-06-26| telegram

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