rocksdb/tools
Islam AbdelRahman 68a8e6b8fa Introduce FullMergeV2 (eliminate memcpy from merge operators)
Summary:
This diff update the code to pin the merge operator operands while the merge operation is done, so that we can eliminate the memcpy cost, to do that we need a new public API for FullMerge that replace the std::deque<std::string> with std::vector<Slice>

This diff is stacked on top of D56493 and D56511

In this diff we
- Update FullMergeV2 arguments to be encapsulated in MergeOperationInput and MergeOperationOutput which will make it easier to add new arguments in the future
- Replace std::deque<std::string> with std::vector<Slice> to pass operands
- Replace MergeContext std::deque with std::vector (based on a simple benchmark I ran https://gist.github.com/IslamAbdelRahman/78fc86c9ab9f52b1df791e58943fb187)
- Allow FullMergeV2 output to be an existing operand

```
[Everything in Memtable | 10K operands | 10 KB each | 1 operand per key]

DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="mergerandom,readseq,readseq,readseq,readseq,readseq" --merge_operator="max" --merge_keys=10000 --num=10000 --disable_auto_compactions --value_size=10240 --write_buffer_size=1000000000

[FullMergeV2]
readseq      :       0.607 micros/op 1648235 ops/sec; 16121.2 MB/s
readseq      :       0.478 micros/op 2091546 ops/sec; 20457.2 MB/s
readseq      :       0.252 micros/op 3972081 ops/sec; 38850.5 MB/s
readseq      :       0.237 micros/op 4218328 ops/sec; 41259.0 MB/s
readseq      :       0.247 micros/op 4043927 ops/sec; 39553.2 MB/s

[master]
readseq      :       3.935 micros/op 254140 ops/sec; 2485.7 MB/s
readseq      :       3.722 micros/op 268657 ops/sec; 2627.7 MB/s
readseq      :       3.149 micros/op 317605 ops/sec; 3106.5 MB/s
readseq      :       3.125 micros/op 320024 ops/sec; 3130.1 MB/s
readseq      :       4.075 micros/op 245374 ops/sec; 2400.0 MB/s
```

```
[Everything in Memtable | 10K operands | 10 KB each | 10 operand per key]

DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="mergerandom,readseq,readseq,readseq,readseq,readseq" --merge_operator="max" --merge_keys=1000 --num=10000 --disable_auto_compactions --value_size=10240 --write_buffer_size=1000000000

[FullMergeV2]
readseq      :       3.472 micros/op 288018 ops/sec; 2817.1 MB/s
readseq      :       2.304 micros/op 434027 ops/sec; 4245.2 MB/s
readseq      :       1.163 micros/op 859845 ops/sec; 8410.0 MB/s
readseq      :       1.192 micros/op 838926 ops/sec; 8205.4 MB/s
readseq      :       1.250 micros/op 800000 ops/sec; 7824.7 MB/s

[master]
readseq      :      24.025 micros/op 41623 ops/sec;  407.1 MB/s
readseq      :      18.489 micros/op 54086 ops/sec;  529.0 MB/s
readseq      :      18.693 micros/op 53495 ops/sec;  523.2 MB/s
readseq      :      23.621 micros/op 42335 ops/sec;  414.1 MB/s
readseq      :      18.775 micros/op 53262 ops/sec;  521.0 MB/s

```

```
[Everything in Block cache | 10K operands | 10 KB each | 1 operand per key]

[FullMergeV2]
$ DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="readseq,readseq,readseq,readseq,readseq" --merge_operator="max" --num=100000 --db="/dev/shm/merge-random-10K-10KB" --cache_size=1000000000 --use_existing_db --disable_auto_compactions
readseq      :      14.741 micros/op 67837 ops/sec;  663.5 MB/s
readseq      :       1.029 micros/op 971446 ops/sec; 9501.6 MB/s
readseq      :       0.974 micros/op 1026229 ops/sec; 10037.4 MB/s
readseq      :       0.965 micros/op 1036080 ops/sec; 10133.8 MB/s
readseq      :       0.943 micros/op 1060657 ops/sec; 10374.2 MB/s

[master]
readseq      :      16.735 micros/op 59755 ops/sec;  584.5 MB/s
readseq      :       3.029 micros/op 330151 ops/sec; 3229.2 MB/s
readseq      :       3.136 micros/op 318883 ops/sec; 3119.0 MB/s
readseq      :       3.065 micros/op 326245 ops/sec; 3191.0 MB/s
readseq      :       3.014 micros/op 331813 ops/sec; 3245.4 MB/s
```

```
[Everything in Block cache | 10K operands | 10 KB each | 10 operand per key]

DEBUG_LEVEL=0 make db_bench -j64 && ./db_bench --benchmarks="readseq,readseq,readseq,readseq,readseq" --merge_operator="max" --num=100000 --db="/dev/shm/merge-random-10-operands-10K-10KB" --cache_size=1000000000 --use_existing_db --disable_auto_compactions

[FullMergeV2]
readseq      :      24.325 micros/op 41109 ops/sec;  402.1 MB/s
readseq      :       1.470 micros/op 680272 ops/sec; 6653.7 MB/s
readseq      :       1.231 micros/op 812347 ops/sec; 7945.5 MB/s
readseq      :       1.091 micros/op 916590 ops/sec; 8965.1 MB/s
readseq      :       1.109 micros/op 901713 ops/sec; 8819.6 MB/s

[master]
readseq      :      27.257 micros/op 36687 ops/sec;  358.8 MB/s
readseq      :       4.443 micros/op 225073 ops/sec; 2201.4 MB/s
readseq      :       5.830 micros/op 171526 ops/sec; 1677.7 MB/s
readseq      :       4.173 micros/op 239635 ops/sec; 2343.8 MB/s
readseq      :       4.150 micros/op 240963 ops/sec; 2356.8 MB/s
```

Test Plan: COMPILE_WITH_ASAN=1 make check -j64

Reviewers: yhchiang, andrewkr, sdong

Reviewed By: sdong

Subscribers: lovro, andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D57075
2016-07-20 09:49:03 -07:00
..
dump Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
rdb fix typos in comments 2015-12-11 01:54:48 +09:00
auto_sanity_test.sh fix typos in comments 2015-12-11 01:54:48 +09:00
benchmark_leveldb.sh Add scripts to run leveldb benchmark 2015-04-27 19:32:56 -07:00
benchmark.sh Initial script for the new regression test 2016-05-09 13:32:57 -07:00
check_format_compatible.sh Fetch branches from github for format compatibility test 2016-06-10 13:17:14 -07:00
db_bench_tool_test.cc Allows db_bench to take an options file 2016-06-02 16:24:14 -07:00
db_bench_tool.cc Fixed Minor Bug on Windows Build and db_bench_tool.cc (#1189) 2016-06-29 18:44:22 -07:00
db_bench.cc Initial script for the new regression test 2016-05-09 13:32:57 -07:00
db_crashtest.py Introduce FullMergeV2 (eliminate memcpy from merge operators) 2016-07-20 09:49:03 -07:00
db_repl_stress.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
db_sanity_test.cc Fix clang analyzer errors 2016-07-08 17:50:51 -07:00
db_stress.cc Introduce FullMergeV2 (eliminate memcpy from merge operators) 2016-07-20 09:49:03 -07:00
dbench_monitor Added simple monitoring script to monitor overusage of memory in db_bench 2015-02-11 18:40:11 -08:00
Dockerfile adding docker build script and dockerfile 2015-05-22 16:03:39 -07:00
generate_random_db.sh Script to check whether RocksDB can read DB generated by previous releases and vice versa 2015-04-08 16:04:59 -07:00
ldb_cmd_impl.h ldb backup support 2016-07-14 14:09:31 -07:00
ldb_cmd_test.cc [ldb] Export ldb_cmd*.h 2016-05-06 16:09:09 -07:00
ldb_cmd.cc ldb backup support 2016-07-14 14:09:31 -07:00
ldb_test.py ldb to support --column_family option 2016-01-25 14:58:18 -08:00
ldb_tool.cc ldb backup support 2016-07-14 14:09:31 -07:00
ldb.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
pflag Added simple monitoring script to monitor overusage of memory in db_bench 2015-02-11 18:40:11 -08:00
reduce_levels_test.cc [ldb] Templatize the Selector 2016-05-13 12:12:39 -07:00
regression_test.sh Improve regression_test.sh 2016-06-28 14:10:24 -07:00
rocksdb_dump_test.sh Update dump_tool and undump_tool to accept Options 2015-10-05 19:49:48 -07:00
run_flash_bench.sh Update benchmarks used to measure subcompaction performance 2016-03-04 12:32:11 -08:00
run_leveldb.sh Add scripts to run leveldb benchmark 2015-04-27 19:32:56 -07:00
sample-dump.dmp First version of rocksdb_dump and rocksdb_undump. 2015-06-19 16:24:36 -07:00
sst_dump_test.cc Shared dictionary compression using reference block 2016-04-27 17:36:03 -07:00
sst_dump_tool_imp.h Adding pin_l0_filter_and_index_blocks_in_cache feature and related fixes. 2016-04-01 10:42:39 -07:00
sst_dump_tool.cc New Statistics to track Compression/Decompression (#1197) 2016-07-19 09:44:03 -07:00
sst_dump.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
verify_random_db.sh Script to check whether RocksDB can read DB generated by previous releases and vice versa 2015-04-08 16:04:59 -07:00
write_stress_runner.py Write stress test 2015-10-28 16:15:07 -07:00
write_stress.cc Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00