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From Strong Su <lovelo...@gmail.com>
Subject Help about log4j tests
Date Tue, 22 Sep 2015 03:16:57 GMT
Hello everyone,

I'm ready to update log4j1 to log4j2. But when I run the tests from
log4j-perf with

java -jar log4j-perf/target/benchmarks.jar ".*Async.*Benchmark.*" -f 1 -wi 5
-i 5

java -jar log4j-perf/target/benchmarks.jar ".*Async.*Benchmark.*" -f 1 -wi 5
-i 5 -t 4 -si true


I have a little confusion about the result because async log4j2 doesn't
perform as fast as I think. I do not really know the meaning of score,
error. Maybe I mis-understand the numbers. And what's the difference
between AsyncAppenderLog4jBenchmak.throughput and
AsyncAppenderLog4jBenchark.throughputBaseline?

Single thread:

Benchmark                                                         Mode
Samples          Score          Error  Units

o.a.l.l.p.j.AsyncAppenderLog4j1Benchmark.throughput              thrpt
  5     341077.918 ±    56973.052  ops/s

o.a.l.l.p.j.AsyncAppenderLog4j1Benchmark.throughputBaseline      thrpt
  5  313156075.427 ± 15007930.610  ops/s

o.a.l.l.p.j.AsyncAppenderLog4j2Benchmark.throughput              thrpt
  5     274396.261 ±   104562.008  ops/s

o.a.l.l.p.j.AsyncAppenderLog4j2Benchmark.throughputBaseline      thrpt
  5  300448118.296 ± 20954996.392  ops/s

o.a.l.l.p.j.AsyncAppenderLogbackBenchmark.throughput             thrpt
  5     250630.705 ±    44783.168  ops/s

o.a.l.l.p.j.AsyncAppenderLogbackBenchmark.throughputBaseline     thrpt
  5  428087377.013 ± 14987003.793  ops/s

o.a.l.l.p.j.AsyncLoggersBenchmark.throughput                     thrpt
  5     340843.298 ±    13391.381  ops/s

o.a.l.l.p.j.AsyncLoggersBenchmark.throughputBaseline             thrpt
  5  310154863.556 ± 52270586.260  ops/s

o.a.l.l.p.j.AsyncAppenderLog4j1Benchmark.latency                sample
81920        356.471 ±       34.995  ns/op

o.a.l.l.p.j.AsyncAppenderLog4j1Benchmark.latencyBaseline        sample
51424         72.723 ±        2.497  ns/op

o.a.l.l.p.j.AsyncAppenderLog4j2Benchmark.latency                sample
52362       5465.711 ±     1127.586  ns/op

o.a.l.l.p.j.AsyncAppenderLog4j2Benchmark.latencyBaseline        sample
53929         72.443 ±        5.108  ns/op

o.a.l.l.p.j.AsyncAppenderLogbackBenchmark.latency               sample
85137       3218.803 ±      703.425  ns/op

o.a.l.l.p.j.AsyncAppenderLogbackBenchmark.latencyBaseline       sample
63792         49.811 ±        1.118  ns/op

o.a.l.l.p.j.AsyncLoggersBenchmark.latency                       sample
60990       2792.624 ±      329.020  ns/op

o.a.l.l.p.j.AsyncLoggersBenchmark.latencyBaseline               sample
65997         48.625 ±        0.908  ns/op

four threads:

Benchmark                                                         Mode
Samples          Score           Error  Units

o.a.l.l.p.j.AsyncAppenderLog4j1Benchmark.throughput              thrpt
  5     336129.060 ±     91403.864  ops/s

o.a.l.l.p.j.AsyncAppenderLog4j1Benchmark.throughputBaseline      thrpt
  5  603886890.062 ±   5855781.921  ops/s

o.a.l.l.p.j.AsyncAppenderLog4j2Benchmark.throughput              thrpt
  5     207837.711 ±     59456.958  ops/s

o.a.l.l.p.j.AsyncAppenderLog4j2Benchmark.throughputBaseline      thrpt
  5  667589696.890 ± 113605555.590  ops/s

o.a.l.l.p.j.AsyncAppenderLogbackBenchmark.throughput             thrpt
  5     204393.757 ±     42566.910  ops/s

o.a.l.l.p.j.AsyncAppenderLogbackBenchmark.throughputBaseline     thrpt
  5  872806332.178 ± 136706283.485  ops/s

o.a.l.l.p.j.AsyncLoggersBenchmark.throughput                     thrpt
  5     236850.656 ±    136504.885  ops/s

o.a.l.l.p.j.AsyncLoggersBenchmark.throughputBaseline             thrpt
  5  643801055.425 ± 140478301.365  ops/s

o.a.l.l.p.j.AsyncAppenderLog4j1Benchmark.latency                sample
233570      15274.635 ±     19813.054  ns/op

o.a.l.l.p.j.AsyncAppenderLog4j1Benchmark.latencyBaseline        sample
220639         96.236 ±         1.355  ns/op

o.a.l.l.p.j.AsyncAppenderLog4j2Benchmark.latency                sample
288629      18893.983 ±      3047.142  ns/op

o.a.l.l.p.j.AsyncAppenderLog4j2Benchmark.latencyBaseline        sample
223351         91.484 ±         2.219  ns/op

o.a.l.l.p.j.AsyncAppenderLogbackBenchmark.latency               sample
196275      20113.644 ±      3946.275  ns/op

o.a.l.l.p.j.AsyncAppenderLogbackBenchmark.latencyBaseline       sample
267998         90.178 ±         0.421  ns/op

o.a.l.l.p.j.AsyncLoggersBenchmark.latency                       sample
310559      15449.140 ±      1886.222  ns/op

o.a.l.l.p.j.AsyncLoggersBenchmark.latencyBaseline               sample
252935         90.349 ±         6.792  ns/op



Thank you.

Best Regards,

Dylan Su

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