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Jaromir Vanek fb9a167a55 Add 95% confidence intervals to db_bench output (#9882) 
Summary:
Enhancing `db_bench` output with 95% statistical confidence intervals for better performance evaluation. The goal is to unambiguously separate random variance when running benchmark over multiple iterations.

Output enhanced with confidence intervals exposed in brackets:

```
$ ./db_bench --benchmarks=fillseq[-X10]

Running benchmark for 10 times
fillseq      :       4.961 micros/op 201578 ops/sec;   22.3 MB/s
fillseq      :       5.030 micros/op 198824 ops/sec;   22.0 MB/s
fillseq [AVG 2 runs] : 200201 (± 2698) ops/sec;   22.1 (± 0.3) MB/sec
fillseq      :       4.963 micros/op 201471 ops/sec;   22.3 MB/s
fillseq [AVG 3 runs] : 200624 (± 1765) ops/sec;   22.2 (± 0.2) MB/sec
fillseq      :       5.035 micros/op 198625 ops/sec;   22.0 MB/s
fillseq [AVG 4 runs] : 200124 (± 1586) ops/sec;   22.1 (± 0.2) MB/sec
fillseq      :       4.979 micros/op 200861 ops/sec;   22.2 MB/s
fillseq [AVG 5 runs] : 200272 (± 1262) ops/sec;   22.2 (± 0.1) MB/sec
fillseq      :       4.893 micros/op 204367 ops/sec;   22.6 MB/s
fillseq [AVG 6 runs] : 200954 (± 1688) ops/sec;   22.2 (± 0.2) MB/sec
fillseq      :       4.914 micros/op 203502 ops/sec;   22.5 MB/s
fillseq [AVG 7 runs] : 201318 (± 1595) ops/sec;   22.3 (± 0.2) MB/sec
fillseq      :       4.998 micros/op 200074 ops/sec;   22.1 MB/s
fillseq [AVG 8 runs] : 201163 (± 1415) ops/sec;   22.3 (± 0.2) MB/sec
fillseq      :       4.946 micros/op 202188 ops/sec;   22.4 MB/s
fillseq [AVG 9 runs] : 201277 (± 1267) ops/sec;   22.3 (± 0.1) MB/sec
fillseq      :       5.093 micros/op 196331 ops/sec;   21.7 MB/s
fillseq [AVG 10 runs] : 200782 (± 1491) ops/sec;   22.2 (± 0.2) MB/sec
fillseq [AVG    10 runs] : 200782 (± 1491) ops/sec;   22.2 (± 0.2) MB/sec
fillseq [MEDIAN 10 runs] : 201166 ops/sec;   22.3 MB/s
```

For more explicit interval representation, use `--confidence_interval_only` flag:

```
$ ./db_bench --benchmarks=fillseq[-X10] --confidence_interval_only

Running benchmark for 10 times
fillseq      :       4.935 micros/op 202648 ops/sec;   22.4 MB/s
fillseq      :       5.078 micros/op 196943 ops/sec;   21.8 MB/s
fillseq [CI95 2 runs] : (194205, 205385) ops/sec; (21.5, 22.7) MB/sec
fillseq      :       5.159 micros/op 193816 ops/sec;   21.4 MB/s
fillseq [CI95 3 runs] : (192735, 202869) ops/sec; (21.3, 22.4) MB/sec
fillseq      :       4.947 micros/op 202158 ops/sec;   22.4 MB/s
fillseq [CI95 4 runs] : (194721, 203061) ops/sec; (21.5, 22.5) MB/sec
fillseq      :       4.908 micros/op 203756 ops/sec;   22.5 MB/s
fillseq [CI95 5 runs] : (196113, 203615) ops/sec; (21.7, 22.5) MB/sec
fillseq      :       5.063 micros/op 197528 ops/sec;   21.9 MB/s
fillseq [CI95 6 runs] : (196319, 202631) ops/sec; (21.7, 22.4) MB/sec
fillseq      :       5.214 micros/op 191799 ops/sec;   21.2 MB/s
fillseq [CI95 7 runs] : (194953, 201803) ops/sec; (21.6, 22.3) MB/sec
fillseq      :       5.260 micros/op 190095 ops/sec;   21.0 MB/s
fillseq [CI95 8 runs] : (193749, 200937) ops/sec; (21.4, 22.2) MB/sec
fillseq      :       5.076 micros/op 196992 ops/sec;   21.8 MB/s
fillseq [CI95 9 runs] : (194134, 200474) ops/sec; (21.5, 22.2) MB/sec
fillseq      :       5.388 micros/op 185603 ops/sec;   20.5 MB/s
fillseq [CI95 10 runs] : (192487, 199781) ops/sec; (21.3, 22.1) MB/sec
fillseq [AVG    10 runs] : 196134 (± 3647) ops/sec;   21.7 (± 0.4) MB/sec
fillseq [MEDIAN 10 runs] : 196968 ops/sec;   21.8 MB/sec
```

Pull Request resolved: https://github.com/facebook/rocksdb/pull/9882

Reviewed By: pdillinger

Differential Revision: D35796148

Pulled By: vanekjar

fbshipit-source-id: 8313712d16728ff982b8aff28195ee56622385b8
2022-04-25 14:49:54 -07:00
..
advisor Update branch as "main" in tools/advisor/README.md (#8744) 2021-09-01 20:26:28 -07:00
block_cache_analyzer Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
dump Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
analyze_txn_stress_test.sh
auto_sanity_test.sh
backup_db.sh Revamp check_format_compatible.sh (#8012) 2021-03-02 11:42:27 -08:00
benchmark.sh Remove deprecated API AdvancedColumnFamilyOptions::rate_limit_delay_max_milliseconds (#9455) 2022-01-28 16:47:08 -08:00
benchmark_leveldb.sh
blob_dump.cc Remove using namespace (#9369) 2022-01-12 09:31:12 -08:00
check_all_python.py Allow missing "unversioned" python, as in CentOS 8 (#6883) 2020-05-29 11:29:23 -07:00
check_format_compatible.sh Add 7.2 to compatible check (#9858) 2022-04-20 11:34:20 -07:00
CMakeLists.txt Mark dependencies as PRIVATE and fix missing dependencies in tools. (#6790) 2020-05-12 21:07:55 -07:00
db_bench.cc Add (& fix) some simple source code checks (#8821) 2021-09-07 21:19:27 -07:00
db_bench_tool.cc Add 95% confidence intervals to db_bench output (#9882) 2022-04-25 14:49:54 -07:00
db_bench_tool_test.cc Remove BlockBasedTableOptions.hash_index_allow_collision (#9454) 2022-03-01 13:58:02 -08:00
db_crashtest.py Add WAL compression to stress tests (#9811) 2022-04-06 15:47:09 -07:00
db_repl_stress.cc Remove using namespace (#9369) 2022-01-12 09:31:12 -08:00
db_sanity_test.cc Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
dbench_monitor
Dockerfile
generate_random_db.sh
ingest_external_sst.sh
io_tracer_parser.cc Add IO Tracer Parser (#7333) 2020-09-23 15:50:26 -07:00
io_tracer_parser_test.cc Cleanup includes in dbformat.h (#8930) 2021-09-29 04:04:40 -07:00
io_tracer_parser_tool.cc Add request_id in IODebugContext. (#8045) 2021-04-01 13:14:51 -07:00
io_tracer_parser_tool.h Add IO Tracer Parser (#7333) 2020-09-23 15:50:26 -07:00
ldb.cc Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
ldb_cmd.cc Add blob dump support to the dump_live_files command (#9896) 2022-04-22 16:54:43 -07:00
ldb_cmd_impl.h Add blob dump support to the dump_live_files command (#9896) 2022-04-22 16:54:43 -07:00
ldb_cmd_test.cc Add manifest fix-up utility for file temperatures (#9683) 2022-03-18 16:35:51 -07:00
ldb_test.py Add blob dump support to the dump_live_files command (#9896) 2022-04-22 16:54:43 -07:00
ldb_tool.cc Add manifest fix-up utility for file temperatures (#9683) 2022-03-18 16:35:51 -07:00
pflag
reduce_levels_test.cc Remove some unneeded code (#8736) 2021-09-01 14:28:58 -07:00
regression_test.sh Fix COMMIT_ID in regression_test.sh (#9047) 2021-10-18 11:01:06 -07:00
restore_db.sh Revamp check_format_compatible.sh (#8012) 2021-03-02 11:42:27 -08:00
rocksdb_dump_test.sh
run_blob_bench.sh Add blob compaction readahead size to the BlobDB benchmark script (#9566) 2022-02-14 15:38:32 -08:00
run_flash_bench.sh
run_leveldb.sh
sample-dump.dmp
simulated_hybrid_file_system.cc Improve SimulatedHybridFileSystem (#9301) 2021-12-29 11:14:42 -08:00
simulated_hybrid_file_system.h Improve SimulatedHybridFileSystem (#9301) 2021-12-29 11:14:42 -08:00
sst_dump.cc Implement a new subcommand "identify" for sst_dump (#6943) 2020-06-08 13:58:28 -07:00
sst_dump_test.cc Use the comparator from the sst file table properties in sst_dump_tool (#9491) 2022-02-08 12:15:35 -08:00
sst_dump_tool.cc Add "no compression" job to CircleCI (#9850) 2022-04-18 12:47:16 -07:00
trace_analyzer.cc Replace namespace name "rocksdb" with ROCKSDB_NAMESPACE (#6433) 2020-02-20 12:09:57 -08:00
trace_analyzer_test.cc Disable the QPS verification in test temporally (#9190) 2021-11-19 23:47:43 -08:00
trace_analyzer_tool.cc Simplify TraceAnalyzer (#8697) 2021-08-24 18:18:36 -07:00
trace_analyzer_tool.h Add commit marker with timestamp (#9266) 2021-12-10 11:05:35 -08:00
verify_random_db.sh
write_external_sst.sh Revamp check_format_compatible.sh (#8012) 2021-03-02 11:42:27 -08:00
write_stress.cc Add a SystemClock class to capture the time functions of an Env (#7858) 2021-01-25 22:09:11 -08:00
write_stress_runner.py Allow missing "unversioned" python, as in CentOS 8 (#6883) 2020-05-29 11:29:23 -07:00