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Summary: We fix two bugs in CalcHashBits. The first one is an off-by-one error: the desired number of table slots is the real number ``capacity / (kLoadFactor * handle_charge)``, which should not be rounded down. The second one is that we should disallow inputs that set the element charge to 0, namely ``estimated_value_size == 0 && metadata_charge_policy == kDontChargeCacheMetadata``. Pull Request resolved: https://github.com/facebook/rocksdb/pull/10295 Test Plan: CalcHashBits is tested by CalcHashBitsTest (in lru_cache_test.cc). The test now iterates over many more inputs; it covers, in particular, the rounding error edge case. Overall, the test is now more robust. Run ``make -j24 check``. Reviewed By: pdillinger Differential Revision: D37573797 Pulled By: guidotag fbshipit-source-id: ea4f4439f7196ab1c1afb88f566fe92850537262 |
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| .. | ||
| cache.cc | ||
| cache_bench.cc | ||
| cache_bench_tool.cc | ||
| cache_entry_roles.cc | ||
| cache_entry_roles.h | ||
| cache_entry_stats.h | ||
| cache_helpers.h | ||
| cache_key.cc | ||
| cache_key.h | ||
| cache_reservation_manager.cc | ||
| cache_reservation_manager.h | ||
| cache_reservation_manager_test.cc | ||
| cache_test.cc | ||
| clock_cache.cc | ||
| clock_cache.h | ||
| compressed_secondary_cache.cc | ||
| compressed_secondary_cache.h | ||
| compressed_secondary_cache_test.cc | ||
| fast_lru_cache.cc | ||
| fast_lru_cache.h | ||
| lru_cache.cc | ||
| lru_cache.h | ||
| lru_cache_test.cc | ||
| sharded_cache.cc | ||
| sharded_cache.h | ||