In a scenario where a bank is unrooted and dropped, any keys that exist
_only_ in that bank are now cleaned up.
This work was originally based on PR #15106.
* stretchy roots tracker
* rename hash to hash_set in tests
* update comment
* try 2 widths in test
* bool iter
* add assert
* helper function for bitfield insert/remove
* introduce RollingBitFieldTester
* another bool iter replacement
* map cleanup
* map to cloned
* Account for possibility of cache flush in load()
* More cleaning
* More cleaning
* Remove unused method and some comment cleaning
* Fix typo
* Make the detected impossible purge race panic()!
* Finally revert to original .expect()
* Fix typos...
* Add assertion for max_root for easier reasoning
* Reframe races with LoadHint as possible opt.
* Fix test
* Make race bug tests run longer for less flaky
* Delay the clone-in-lock slow path even for RPC
* Make get_account panic-free & add its onchain ver.
* Fix rebase conflicts...
* Clean up
* Clean up comment
* Revert fn name change
* Fix flaky test...
* fmt...
Co-authored-by: Ryo Onodera <ryoqun@gmail.com>
* Replace RootsTracker HashSet
* use bitvec
* cleanup, add brenchmark test
* test cleanup
* add lots of tests
* get rid of demo
* change warp test constant
* get rid of unused function
* pr feedback
* reorder use
* rework get_all to remove range checks
* add tests, fix bugs
Clean less keys by tracking the two cases:
* Touched keys per slot in uncleaned_keys derived from
accounts delta hash operation.
* Set of keys with any zero-lamport updates.
* Dont skip eager rent collect across gapped epochs
* Adjust style and comment
* Adjust ascii chart and comment a bit
* Moar assert
* Relax the partition_count assert for completeness
* Tweak comment...
* tweak a bit
* Add gating logic
* Address reviews
* small formatting
* Clarify the code by replacing auto_generated...
* small formatting
* small formatting
* small formatting
* small formatting
* Narrow down conditional compilation scope
* Prioritize shrinking of previously cleaned roots
* measure time of stale slot shrinking
* Disable shrink for test
* shrink: budgeting, store count, force for snapshot
* Polish implementation and fix tests
* Fix ci..
* Clean up a bit
* Further polish implementation and fix/add tests
* Rebase fixes
* Remove unneeded Default for AccountStorageEntry
* Address review comments
* More cleanup
* More cleanup
