Islam AbdelRahman cce702a6e4 [db_bench] Support single benchmark arguments (Repeat for X times, Warm up for X times), Support CombinedStats (AVG / MEDIAN)
Summary:
This diff allow us to run a single benchmark X times and warm it up for Y times. and see the AVG & MEDIAN throughput of these X runs
for example

```
$ ./db_bench --benchmarks="fillseq,readseq[X5-W2]"
Initializing RocksDB Options from the specified file
Initializing RocksDB Options from command-line flags
RocksDB:    version 4.12
Date:       Wed Aug 24 10:45:26 2016
CPU:        32 * Intel(R) Xeon(R) CPU E5-2660 0 @ 2.20GHz
CPUCache:   20480 KB
Keys:       16 bytes each
Values:     100 bytes each (50 bytes after compression)
Entries:    1000000
Prefix:    0 bytes
Keys per prefix:    0
RawSize:    110.6 MB (estimated)
FileSize:   62.9 MB (estimated)
Write rate: 0 bytes/second
Compression: Snappy
Memtablerep: skip_list
Perf Level: 1
WARNING: Assertions are enabled; benchmarks unnecessarily slow
------------------------------------------------
Initializing RocksDB Options from the specified file
Initializing RocksDB Options from command-line flags
DB path: [/tmp/rocksdbtest-8616/dbbench]
fillseq      :       4.695 micros/op 212971 ops/sec;   23.6 MB/s
DB path: [/tmp/rocksdbtest-8616/dbbench]
Warming up benchmark by running 2 times
readseq      :       0.214 micros/op 4677005 ops/sec;  517.4 MB/s
readseq      :       0.212 micros/op 4706834 ops/sec;  520.7 MB/s
Running benchmark for 5 times
readseq      :       0.218 micros/op 4588187 ops/sec;  507.6 MB/s
readseq      :       0.208 micros/op 4816538 ops/sec;  532.8 MB/s
readseq      :       0.213 micros/op 4685376 ops/sec;  518.3 MB/s
readseq      :       0.214 micros/op 4676787 ops/sec;  517.4 MB/s
readseq      :       0.217 micros/op 4618532 ops/sec;  510.9 MB/s
readseq [AVG    5 runs] : 4677084 ops/sec;  517.4 MB/sec
readseq [MEDIAN 5 runs] : 4676787 ops/sec;  517.4 MB/sec
```

Test Plan: run db_bench

Reviewers: sdong, andrewkr, yhchiang

Reviewed By: yhchiang

Subscribers: andrewkr, dhruba

Differential Revision: https://reviews.facebook.net/D62235
2016-08-25 12:57:35 -07:00
..
2015-12-11 01:54:48 +09:00
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