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Siying Dong 0bb555630f Consolidate hash function used for non-persistent data in a new function (#5155) 
Summary:
Create new function NPHash64() and GetSliceNPHash64(), which are currently
implemented using murmurhash.
Replace the current direct call of murmurhash() to use the new functions
if the hash results are not used in on-disk format.
This will make it easier to try out or switch to alternative functions
in the uses where data format compatibility doesn't need to be considered.
This part shouldn't have any performance impact.

Also, the sharded cache hash function is changed to the new format, because
it falls into this categoery. It doesn't show visible performance impact
in db_bench results. CPU showed by perf is increased from about 0.2% to 0.4%
in an extreme benchmark setting (4KB blocks, no-compression, everything
cached in block cache). We've known that the current hash function used,
our own Hash() has serious hash quality problem. It can generate a lots of
conflicts with similar input. In this use case, it means extra lock contention
for reads from the same file. This slight CPU regression is worthy to me
to counter the potential bad performance with hot keys. And hopefully this
will get further improved in the future with a better hash function.

cache_test's condition is relaxed a little bit to. The new hash is slightly
more skewed in this use case, but I manually checked the data and see
the hash results are still in a reasonable range.
Pull Request resolved: https://github.com/facebook/rocksdb/pull/5155

Differential Revision: D14834821

Pulled By: siying

fbshipit-source-id: ec9a2c0a2f8ae4b54d08b13a5c2e9cc97aa80cb5
2019-04-08 13:32:06 -07:00
..
builder.cc Feature for sampling and reporting compressibility (#4842) 2019-03-18 12:15:34 -07:00
builder.h Feature for sampling and reporting compressibility (#4842) 2019-03-18 12:15:34 -07:00
c_test.c Get CompactionJobInfo from CompactFiles 2018-12-13 14:21:24 -08:00
c.cc Add missing C API for transaction (#5077) 2019-03-19 09:43:22 -07:00
column_family_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
column_family.cc Add DBOptions. avoid_unnecessary_blocking_io to defer file deletions (#5043) 2019-04-01 17:10:40 -07:00
column_family.h Lock free MultiGet (#4754) 2019-01-02 11:42:54 -08:00
compact_files_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
compacted_db_impl.cc move dump stats to a separate thread (#4382) 2018-10-08 22:54:43 -07:00
compacted_db_impl.h Enable checkpoint of read-only db (#4681) 2018-12-07 17:06:02 -08:00
compaction_iteration_stats.h add counter for deletion dropping optimization 2017-08-19 14:10:08 -07:00
compaction_iterator_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
compaction_iterator.cc WritePrepared: relax assert in compaction iterator (#4969) 2019-02-11 15:01:46 -08:00
compaction_iterator.h Deprecate CompactionFilter::IgnoreSnapshots() = false (#4954) 2019-02-07 16:57:33 -08:00
compaction_job_stats_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
compaction_job_test.cc Collect compaction stats by priority and dump to info LOG (#5050) 2019-03-19 17:28:19 -07:00
compaction_job.cc Collect compaction stats by priority and dump to info LOG (#5050) 2019-03-19 17:28:19 -07:00
compaction_job.h Collect compaction stats by priority and dump to info LOG (#5050) 2019-03-19 17:28:19 -07:00
compaction_picker_fifo.cc Deprecate ttl option from CompactionOptionsFIFO (#4965) 2019-02-15 09:51:41 -08:00
compaction_picker_fifo.h Move FIFOCompactionPicker to a separate file (#4724) 2018-11-29 16:04:52 -08:00
compaction_picker_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
compaction_picker_universal.cc Add two more StatsLevel (#5027) 2019-02-28 10:27:59 -08:00
compaction_picker_universal.h Delete triggered compaction for universal style 2018-05-29 15:44:34 -07:00
compaction_picker.cc Move FIFOCompactionPicker to a separate file (#4724) 2018-11-29 16:04:52 -08:00
compaction_picker.h Move FIFOCompactionPicker to a separate file (#4724) 2018-11-29 16:04:52 -08:00
compaction.cc Dictionary compression for files written by SstFileWriter (#4978) 2019-02-14 11:23:55 -08:00
compaction.h Truncate range tombstones by leveraging InternalKeys (#4432) 2018-10-09 15:19:38 -07:00
comparator_db_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
convenience.cc Update all unique/shared_ptr instances to be qualified with namespace std (#4638) 2018-11-09 11:19:58 -08:00
corruption_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
cuckoo_table_db_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
db_basic_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
db_blob_index_test.cc fix lite build 2017-10-17 08:57:09 -07:00
db_block_cache_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
db_bloom_filter_test.cc add whole key bloom filter support in memtables (#4985) 2019-02-19 12:15:39 -08:00
db_compaction_filter_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
db_compaction_test.cc Avoid to go through every CF for every ReleaseSnapshot() (#5090) 2019-03-25 19:18:04 -07:00
db_dynamic_level_test.cc Fix flaky DBDynamicLevelTest.DynamicLevelMaxBytesBase2 (#4668) 2018-11-12 16:42:16 -08:00
db_encryption_test.cc Update all unique/shared_ptr instances to be qualified with namespace std (#4638) 2018-11-09 11:19:58 -08:00
db_filesnapshot.cc Remove redundant member var and set options (#4631) 2018-11-12 12:24:26 -08:00
db_flush_test.cc Improve flushing multiple column families (#4708) 2018-12-13 15:12:40 -08:00
db_impl_compaction_flush.cc Fix many bugs in log statement arguments (#5089) 2019-04-04 12:12:11 -07:00
db_impl_debug.cc Expose DB methods to lock and unlock the WAL (#5146) 2019-04-06 06:40:36 -07:00
db_impl_experimental.cc Update JobContext. (#3949) 2018-08-03 17:42:34 -07:00
db_impl_files.cc Smooth the deletion of WAL files (#5116) 2019-03-28 15:17:13 -07:00
db_impl_open.cc Fix many bugs in log statement arguments (#5089) 2019-04-04 12:12:11 -07:00
db_impl_readonly.cc Add two more StatsLevel (#5027) 2019-02-28 10:27:59 -08:00
db_impl_readonly.h Apply automatic formatting to some files (#5114) 2019-03-27 16:24:45 -07:00
db_impl_secondary.cc Support for single-primary, multi-secondary instances (#4899) 2019-03-26 16:45:31 -07:00
db_impl_secondary.h Support for single-primary, multi-secondary instances (#4899) 2019-03-26 16:45:31 -07:00
db_impl_write.cc Fix many bugs in log statement arguments (#5089) 2019-04-04 12:12:11 -07:00
db_impl.cc Expose DB methods to lock and unlock the WAL (#5146) 2019-04-06 06:40:36 -07:00
db_impl.h Expose DB methods to lock and unlock the WAL (#5146) 2019-04-06 06:40:36 -07:00
db_info_dumper.cc avoid copying when iterating using range-based for (#4459) 2018-10-09 17:15:51 -07:00
db_info_dumper.h Change RocksDB License 2017-07-15 16:11:23 -07:00
db_inplace_update_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
db_io_failure_test.cc Disable DBIOFailureTest.NoSpaceCompactRange in LITE (#4596) 2018-10-29 14:36:31 -07:00
db_iter_stress_test.cc Move prefix_extractor to MutableCFOptions 2018-05-21 14:43:11 -07:00
db_iter_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
db_iter.cc WriteUnPrepared: less virtual in iterator callback (#5049) 2019-04-02 14:47:16 -07:00
db_iter.h Remove v1 RangeDelAggregator (#4778) 2018-12-17 17:33:46 -08:00
db_iterator_test.cc Fix race condition in IteratorWithLocalStatistics (#5149) 2019-04-03 16:04:38 -07:00
db_log_iter_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
db_memtable_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
db_merge_operator_test.cc WriteUnPrepared: less virtual in iterator callback (#5049) 2019-04-02 14:47:16 -07:00
db_options_test.cc Update RepeatableThreadTest with MockTimeEnv (#5107) 2019-03-29 10:08:50 -07:00
db_properties_test.cc Deprecate ttl option from CompactionOptionsFIFO (#4965) 2019-02-15 09:51:41 -08:00
db_range_del_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
db_secondary_test.cc Support for single-primary, multi-secondary instances (#4899) 2019-03-26 16:45:31 -07:00
db_sst_test.cc Update RepeatableThreadTest with MockTimeEnv (#5107) 2019-03-29 10:08:50 -07:00
db_statistics_test.cc Make statistics's stats_level change thread-safe (#5030) 2019-03-01 10:42:09 -08:00
db_table_properties_test.cc Allow dynamic modification of window size and deletion trigger (#4403) 2018-09-20 15:15:28 -07:00
db_tailing_iter_test.cc Remove managed iterator 2018-07-17 14:43:18 -07:00
db_test2.cc Fix the potential DB crash caused by call EndTrace before StartTrace (#5130) 2019-04-03 13:26:34 -07:00
db_test_util.cc Remove cuckoo hash memtable (#4953) 2019-02-07 16:15:27 -08:00
db_test_util.h Remove cuckoo hash memtable (#4953) 2019-02-07 16:15:27 -08:00
db_test.cc Make statistics's stats_level change thread-safe (#5030) 2019-03-01 10:42:09 -08:00
db_universal_compaction_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
db_wal_test.cc Preload some files even if options.max_open_files (#3340) 2018-12-28 18:02:28 -08:00
db_write_test.cc Expose DB methods to lock and unlock the WAL (#5146) 2019-04-06 06:40:36 -07:00
dbformat_test.cc Relax VersionStorageInfo::GetOverlappingInputs check (#4050) 2018-07-13 17:42:38 -07:00
dbformat.cc Apply automatic formatting to some files (#5114) 2019-03-27 16:24:45 -07:00
dbformat.h Apply automatic formatting to some files (#5114) 2019-03-27 16:24:45 -07:00
deletefile_test.cc add assert to silence clang analyzer and fix variable shadowing (#5140) 2019-04-02 21:15:44 -07:00
error_handler_test.cc Fix regression test failures introduced by PR #4164 (#4375) 2018-09-17 13:14:07 -07:00
error_handler.cc Fix typos in comments (#4456) 2018-10-04 20:46:50 -07:00
error_handler.h Fix typos in comments (#4456) 2018-10-04 20:46:50 -07:00
event_helpers.cc Auto recovery from out of space errors (#4164) 2018-09-15 13:43:04 -07:00
event_helpers.h Auto recovery from out of space errors (#4164) 2018-09-15 13:43:04 -07:00
experimental.cc comment unused parameters to turn on -Wunused-parameter flag 2018-04-12 17:59:16 -07:00
external_sst_file_basic_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
external_sst_file_ingestion_job.cc Collect compaction stats by priority and dump to info LOG (#5050) 2019-03-19 17:28:19 -07:00
external_sst_file_ingestion_job.h Atomic ingest (#4895) 2019-02-12 19:16:17 -08:00
external_sst_file_test.cc Refactor ExternalSSTFileTest (#5129) 2019-04-08 11:16:34 -07:00
fault_injection_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
file_indexer_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
file_indexer.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
file_indexer.h Change RocksDB License 2017-07-15 16:11:23 -07:00
filename_test.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
flush_job_test.cc Collect compaction stats by priority and dump to info LOG (#5050) 2019-03-19 17:28:19 -07:00
flush_job.cc Collect compaction stats by priority and dump to info LOG (#5050) 2019-03-19 17:28:19 -07:00
flush_job.h Collect compaction stats by priority and dump to info LOG (#5050) 2019-03-19 17:28:19 -07:00
flush_scheduler.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
flush_scheduler.h Change RocksDB License 2017-07-15 16:11:23 -07:00
forward_iterator_bench.cc Per-thread unique test db names (#4135) 2018-07-13 17:27:39 -07:00
forward_iterator.cc Add DBOptions. avoid_unnecessary_blocking_io to defer file deletions (#5043) 2019-04-01 17:10:40 -07:00
forward_iterator.h Comment out unused variables 2018-03-05 13:13:41 -08:00
in_memory_stats_history.cc add GetStatsHistory to retrieve stats snapshots (#4748) 2019-02-20 15:52:54 -08:00
in_memory_stats_history.h add GetStatsHistory to retrieve stats snapshots (#4748) 2019-02-20 15:52:54 -08:00
internal_stats.cc Collect compaction stats by priority and dump to info LOG (#5050) 2019-03-19 17:28:19 -07:00
internal_stats.h Collect compaction stats by priority and dump to info LOG (#5050) 2019-03-19 17:28:19 -07:00
job_context.h WritePrepared: Fix visible key compacted out by compaction (#4883) 2019-01-15 21:34:38 -08:00
listener_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
log_format.h Fix an inaccurate comment (#4315) 2018-08-24 18:13:20 -07:00
log_reader.cc Support for single-primary, multi-secondary instances (#4899) 2019-03-26 16:45:31 -07:00
log_reader.h Remove some "using std::..." from header files. (#5113) 2019-03-27 10:28:21 -07:00
log_test.cc Support for single-primary, multi-secondary instances (#4899) 2019-03-26 16:45:31 -07:00
log_writer.cc Remove some "using std::..." from header files. (#5113) 2019-03-27 10:28:21 -07:00
log_writer.h Remove some "using std::..." from header files. (#5113) 2019-03-27 10:28:21 -07:00
logs_with_prep_tracker.cc Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
logs_with_prep_tracker.h Skip deleted WALs during recovery 2018-05-03 15:43:09 -07:00
malloc_stats.cc Detect if Jemalloc is linked with the binary (#4844) 2019-01-03 16:30:12 -08:00
malloc_stats.h Change RocksDB License 2017-07-15 16:11:23 -07:00
manual_compaction_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
memtable_list_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
memtable_list.cc Avoid using kInAtomicGroup tag for single-cf op (#4981) 2019-02-13 18:33:42 -08:00
memtable_list.h Use correct FileMeta for atomic flush result install (#4932) 2019-01-31 14:49:51 -08:00
memtable.cc Consolidate hash function used for non-persistent data in a new function (#5155) 2019-04-08 13:32:06 -07:00
memtable.h add whole key bloom filter support in memtables (#4985) 2019-02-19 12:15:39 -08:00
merge_context.h Remove v1 RangeDelAggregator (#4778) 2018-12-17 17:33:46 -08:00
merge_helper_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
merge_helper.cc Add two more StatsLevel (#5027) 2019-02-28 10:27:59 -08:00
merge_helper.h Remove v1 RangeDelAggregator (#4778) 2018-12-17 17:33:46 -08:00
merge_operator.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
merge_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
obsolete_files_test.cc Improve obsolete_files_test (#5125) 2019-03-28 13:16:02 -07:00
options_file_test.cc Per-thread unique test db names (#4135) 2018-07-13 17:27:39 -07:00
perf_context_test.cc Fix some variable naming in db/transaction_log_impl.* (#5112) 2019-03-27 12:27:54 -07:00
pinned_iterators_manager.h Change RocksDB License 2017-07-15 16:11:23 -07:00
plain_table_db_test.cc Revert "Remove PlainTable's feature store_index_in_file (#4914)" (#5034) 2019-03-01 15:45:45 -08:00
pre_release_callback.h Mark logs with prepare in PreReleaseCallback (#5121) 2019-04-02 15:17:47 -07:00
prefix_test.cc Apply modernize-use-override (2nd iteration) 2019-02-14 14:41:36 -08:00
range_del_aggregator_bench.cc Fix Windows broken build error due to non-const override (#4798) 2018-12-19 13:29:51 -08:00
range_del_aggregator_test.cc Remove v1 RangeDelAggregator (#4778) 2018-12-17 17:33:46 -08:00
range_del_aggregator.cc Remove stale TODO (#4800) 2018-12-19 15:45:37 -08:00
range_del_aggregator.h Fix unused member compile error 2018-12-18 14:28:42 -08:00
range_tombstone_fragmenter_test.cc Prepare FragmentedRangeTombstoneIterator for use in compaction (#4740) 2018-12-11 12:10:48 -08:00
range_tombstone_fragmenter.cc Add compaction logic to RangeDelAggregatorV2 (#4758) 2018-12-17 13:20:51 -08:00
range_tombstone_fragmenter.h Add compaction logic to RangeDelAggregatorV2 (#4758) 2018-12-17 13:20:51 -08:00
read_callback.h WriteUnPrepared: less virtual in iterator callback (#5049) 2019-04-02 14:47:16 -07:00
repair_test.cc Acquire lock on DB LOCK file before starting repair. (#4435) 2018-10-12 10:41:54 -07:00
repair.cc Support for single-primary, multi-secondary instances (#4899) 2019-03-26 16:45:31 -07:00
snapshot_checker.h WritePrepared: fix issue with snapshot released during compaction (#4858) 2019-01-16 09:55:32 -08:00
snapshot_impl.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
snapshot_impl.h WriteUnPrepared: less virtual in iterator callback (#5049) 2019-04-02 14:47:16 -07:00
table_cache.cc Introduce a CPU time counter in perf_context (#4741) 2018-12-20 12:03:44 -08:00
table_cache.h Preload some files even if options.max_open_files (#3340) 2018-12-28 18:02:28 -08:00
table_properties_collector_test.cc Feature for sampling and reporting compressibility (#4842) 2019-03-18 12:15:34 -07:00
table_properties_collector.cc Feature for sampling and reporting compressibility (#4842) 2019-03-18 12:15:34 -07:00
table_properties_collector.h Feature for sampling and reporting compressibility (#4842) 2019-03-18 12:15:34 -07:00
transaction_log_impl.cc Fix some variable naming in db/transaction_log_impl.* (#5112) 2019-03-27 12:27:54 -07:00
transaction_log_impl.h Fix some variable naming in db/transaction_log_impl.* (#5112) 2019-03-27 12:27:54 -07:00
version_builder_test.cc Apply modernize-use-override (3) 2019-02-19 13:39:49 -08:00
version_builder.cc Support for single-primary, multi-secondary instances (#4899) 2019-03-26 16:45:31 -07:00
version_builder.h Support for single-primary, multi-secondary instances (#4899) 2019-03-26 16:45:31 -07:00
version_edit_test.cc Add a unit test to Ignorable manfiest record (#4964) 2019-02-11 11:20:24 -08:00
version_edit.cc Add a placeholder in manifest indicating ignorable record (#4960) 2019-02-08 11:33:11 -08:00
version_edit.h Support for single-primary, multi-secondary instances (#4899) 2019-03-26 16:45:31 -07:00
version_set_test.cc Apply modernize-use-override (3) 2019-02-19 13:39:49 -08:00
version_set.cc Fix many bugs in log statement arguments (#5089) 2019-04-04 12:12:11 -07:00
version_set.h Support for single-primary, multi-secondary instances (#4899) 2019-03-26 16:45:31 -07:00
wal_manager_test.cc Update all unique/shared_ptr instances to be qualified with namespace std (#4638) 2018-11-09 11:19:58 -08:00
wal_manager.cc Smooth the deletion of WAL files (#5116) 2019-03-28 15:17:13 -07:00
wal_manager.h Fix memleak when DB::DeleteFile() 2018-01-11 18:57:33 -08:00
write_batch_base.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
write_batch_internal.h WriteUnPrepared: Add new WAL marker kTypeBeginUnprepareXID (#4069) 2018-06-28 18:58:29 -07:00
write_batch_test.cc Apply modernize-use-override (3) 2019-02-19 13:39:49 -08:00
write_batch.cc Apply modernize-use-override (3) 2019-02-19 13:39:49 -08:00
write_callback_test.cc Mark logs with prepare in PreReleaseCallback (#5121) 2019-04-02 15:17:47 -07:00
write_callback.h Change RocksDB License 2017-07-15 16:11:23 -07:00
write_controller_test.cc Apply modernize-use-override (3) 2019-02-19 13:39:49 -08:00
write_controller.cc Change RocksDB License 2017-07-15 16:11:23 -07:00
write_controller.h Change RocksDB License 2017-07-15 16:11:23 -07:00
write_thread.cc Add more sync point to fix flaky test GroupCommitTest 2018-11-07 14:07:53 -08:00
write_thread.h Fix skip WAL for whole write_group when leader's callback fail (#4838) 2019-01-03 12:40:42 -08:00