fork of https://github.com/oxigraph/rocksdb and https://github.com/facebook/rocksdb for nextgraph and oxigraph

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mrambacher 3dff28cf9b Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033) ... Summary: For performance purposes, the lower level routines were changed to use a SystemClock* instead of a std::shared_ptr<SystemClock>. The shared ptr has some performance degradation on certain hardware classes. For most of the system, there is no risk of the pointer being deleted/invalid because the shared_ptr will be stored elsewhere. For example, the ImmutableDBOptions stores the Env which has a std::shared_ptr<SystemClock> in it. The SystemClock* within the ImmutableDBOptions is essentially a "short cut" to gain access to this constant resource. There were a few classes (PeriodicWorkScheduler?) where the "short cut" property did not hold. In those cases, the shared pointer was preserved. Using db_bench readrandom perf_level=3 on my EC2 box, this change performed as well or better than 6.17: 6.17: readrandom : 28.046 micros/op 854902 ops/sec; 61.3 MB/s (355999 of 355999 found) 6.18: readrandom : 32.615 micros/op 735306 ops/sec; 52.7 MB/s (290999 of 290999 found) PR: readrandom : 27.500 micros/op 871909 ops/sec; 62.5 MB/s (367999 of 367999 found) (Note that the times for 6.18 are prior to revert of the SystemClock). Pull Request resolved: https://github.com/facebook/rocksdb/pull/8033 Reviewed By: pdillinger Differential Revision: D27014563 Pulled By: mrambacher fbshipit-source-id: ad0459eba03182e454391b5926bf5cdd45657b67		4 years ago
..
CMakeLists.txt	Mark dependencies as PRIVATE and fix missing dependencies in tools. (#6790)	5 years ago
batched_ops_stress.cc	Integrity protection for live updates to WriteBatch (#7748)	4 years ago
cf_consistency_stress.cc	Fix cf_consistency_stress for backup/restore, harmonize (#7373)	4 years ago
db_stress.cc	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	5 years ago
db_stress_common.cc	Inject the random write error to stress test (#7653)	4 years ago
db_stress_common.h	Limit buffering for collecting samples for compression dictionary (#7970)	4 years ago
db_stress_compaction_filter.h	Fix unused variable failure (#7004)	4 years ago
db_stress_driver.cc	Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033)	4 years ago
db_stress_driver.h	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	5 years ago
db_stress_env_wrapper.h	Fix, enable, and enhance backup/restore in db_stress (#7348)	4 years ago
db_stress_gflags.cc	Limit buffering for collecting samples for compression dictionary (#7970)	4 years ago
db_stress_listener.h	Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433)	5 years ago
db_stress_shared_state.cc	Silence false alarms in db_stress fault injection (#6741)	5 years ago
db_stress_shared_state.h	Inject the random write error to stress test (#7653)	4 years ago
db_stress_stat.h	Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033)	4 years ago
db_stress_table_properties_collector.h	Mark files for compaction in stress/crash tests (#7231)	4 years ago
db_stress_test_base.cc	Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033)	4 years ago
db_stress_test_base.h	Use SystemClock* instead of std::shared_ptr<SystemClock> in lower level routines (#8033)	4 years ago
db_stress_tool.cc	Enable compact filter for blob in dbstress and dbbench (#8011)	4 years ago
no_batched_ops_stress.cc	More Makefile Cleanup (#7097)	4 years ago