x86 - Core i7 中每核 L2 和 L3 之间的互连

Question

英特尔酷睿 i7 具有每核 L1 和 L2 缓存，以及大型共享 L3 缓存。我需要知道哪种互连将多个 L2 连接到单个 L3。我是一名学生，需要编写缓存子系统的粗略行为模型。是横梁吗？单程巴士？戒指？我遇到的引用资料提到了缓存的结构细节，但没有提到存在哪种片上互连。

谢谢

-neha

Answer 1

现代 i7 使用环。来自 Tom's Hardware :

Earlier this year, I had the chance to talk to Sailesh Kottapalli, a senior principle engineer at Intel, who explained that he’d seen sustained bandwidth close to 300 GB/s from the Xeon 7500-series’ LLC, enabled by the ring bus. Additionally, Intel confirmed at IDF that every one of its products currently in development employs the ring bus.

您的模型将非常粗糙，但您也许可以从有关 L3 的 i7 性能计数器的公开信息中收集更多信息。