On 25/03/2017 17:52, Pranith Kumar wrote: > * Implement an LRU translation block code cache. > > In the current TCG design, when the translation cache fills up, we flush all > the translated blocks (TBs) to free up space. We can improve this situation > by not flushing the TBs that were recently used i.e., by implementing an LRU > policy for freeing the blocks. This should avoid the re-translation overhead > for frequently used blocks and improve performance.
IIRC, Emilio measured one flush every roughly 10 seconds with 128 MB cache in system emulation mode---and "never" is a pretty accurate estimate for user-mode emulation. This means that a really hot block would be retranslated very quickly. Paolo
