mirror of https://github.com/valkey-io/valkey
1b5f245eae
General cleanup on LRU/LFU code. Improve modularity and maintainability. Specifically: * Consolidates the mathematical logic for LRU/LFU into `lrulfu.c`, with an API in `lrulfu.h`. Knowledge of the LRU/LFU implementation was previously spread out across `db.c`, `evict.c`, `object.c`, `server.c`, and `server.h`. * Separates knowledge of the LRU from knowledge of the object containing the LRU value. `lrulfu.c` knows about the LRU/LFU algorithms, without knowing about the `robj`. `object.c` knows about the `robj` without knowing about the details of the LRU/LFU algorithms. * Eliminated `server.lruclock`, instead using `server.unixtime`. This also eliminates the periodic need to call `mstime()` to maintain the lru clock. * Fixed a minor computation bug in the old `LFUTimeElapsed` function (off by 1 after rollover). * Eliminate specific IF checks for rollover, using defined behavior for unsigned rollover instead. * Fixed a bug in `debug.c` which would perform LFU modification on an LRU value. --------- Signed-off-by: Jim Brunner <brunnerj@amazon.com> Co-authored-by: Ran Shidlansik <ranshid@amazon.com> |
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