c - 什么是 intel 机器中的 VIctim 缓存？我们可以禁用它吗？

Question

什么是 intel 机器中的 VIctim 缓存？

我们可以禁用它吗？使用 gcc 或使用 bios 或在 linux 中？

Answer 1

来自 wiki :-

A victim cache is a cache used to hold blocks evicted from a CPU cache upon replacement. The victim cache lies between the main cache and its refill path, and only holds blocks that were evicted from the main cache. The victim cache is usually fully associative, and is intended to reduce the number of conflict misses. Many commonly used programs do not require an associative mapping for all the accesses. In fact, only a small fraction of the memory accesses of the program require high associativity. The victim cache exploits this property by providing high associativity to only these accesses. It was introduced by Norman Jouppi from DEC in 1990.[15] Intel's Crystal Well[16] variant of its Haswell processors, equipped with Intel's Iris Pro GT3e embedded graphics and 128 MB of eDRAM, introduced an on-package Level 4 cache which serves as a victim cache to the processors's Level 3 cache