createwindow 发表于 2011-04-13 21:44

关于PCI的memory write and invalidate

规范中是这么描述它的作用的:
It allows a memory performance optimization by invalidating a “dirty” line in a write-back cache without requiring the actual write-back cycle
thus shortening access time.

对于这句话很是不解,invalidate是如何操作的? 大家请指教。
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