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Jetty-based benchmark for memory usage #329

Merged
merged 9 commits into from
Apr 17, 2020
Merged

Jetty-based benchmark for memory usage #329

merged 9 commits into from
Apr 17, 2020

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pmm-sumo
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This PR attempts at measuring what is the impact of having the agent on the memory profile of app. Essentially a first part of issue: #312

I added a basic custom memory profiler that measures the amount of memory consumed before and after the series of operations.

The benchmark runs an embedded Jetty server with a basic servlet and runs a series of GET requests. Both parts should be automatically instrumented and impact memory and cpu usage.

Running this locally on macOS and OpenJDK 11.0.6, I got following results:

gc.alloc.rate.norm heap.used.before
No agent 55,927 B/op 9,826,125 B
OT 0.2.3-SNAPSHOT 88,233 B/op 31,947,220 B

Raw benchmark results:

HttpBenchmark.WithOT023ExpAgent.testMakingRequest                                   avgt   10         13.186 ±         0.856   ms/op
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·gc.alloc.rate                    avgt   10          6.074 ±         0.364  MB/sec
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·gc.alloc.rate.norm               avgt   10      88233.833 ±       285.569    B/op
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·gc.churn.G1_Eden_Space           avgt   10          5.337 ±         3.140  MB/sec
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·gc.churn.G1_Eden_Space.norm      avgt   10      77916.125 ±     46270.096    B/op
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·gc.churn.G1_Survivor_Space       avgt   10          0.057 ±         0.139  MB/sec
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·gc.churn.G1_Survivor_Space.norm  avgt   10        822.790 ±      2003.598    B/op
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·gc.count                         avgt   10         14.000                  counts
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·gc.time                          avgt   10        111.000                      ms
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·heap.total.after                 avgt   10  229428428.800 ± 133367802.800   bytes
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·heap.total.before                avgt   10  115133644.800 ±  47721866.371   bytes
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·heap.total.change                avgt   10  114294784.000 ± 177573740.280   bytes
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·heap.used.after                  avgt   10   96286686.400 ±  23026009.240   bytes
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·heap.used.before                 avgt   10   31947220.800 ±  11074380.709   bytes
HttpBenchmark.WithOT023ExpAgent.testMakingRequest:·heap.used.change                 avgt   10   64339465.600 ±  27097305.905   bytes
HttpBenchmark.testMakingRequest                                                     avgt   10         12.438 ±         0.567   ms/op
HttpBenchmark.testMakingRequest:·gc.alloc.rate                                      avgt   10          4.082 ±         0.188  MB/sec
HttpBenchmark.testMakingRequest:·gc.alloc.rate.norm                                 avgt   10      55927.110 ±       220.234    B/op
HttpBenchmark.testMakingRequest:·gc.churn.G1_Eden_Space                             avgt   10          4.732 ±         0.392  MB/sec
HttpBenchmark.testMakingRequest:·gc.churn.G1_Eden_Space.norm                        avgt   10      64861.886 ±      5367.398    B/op
HttpBenchmark.testMakingRequest:·gc.churn.G1_Old_Gen                                avgt   10          1.356 ±         0.230  MB/sec
HttpBenchmark.testMakingRequest:·gc.churn.G1_Old_Gen.norm                           avgt   10      18629.961 ±      3734.859    B/op
HttpBenchmark.testMakingRequest:·gc.count                                           avgt   10        119.000                  counts
HttpBenchmark.testMakingRequest:·gc.time                                            avgt   10        191.000                      ms
HttpBenchmark.testMakingRequest:·heap.total.after                                   avgt   10   41313894.400 ±   3007890.117   bytes
HttpBenchmark.testMakingRequest:·heap.total.before                                  avgt   10   41313894.400 ±   3007890.117   bytes
HttpBenchmark.testMakingRequest:·heap.total.change                                  avgt   10            ≈ 0                   bytes
HttpBenchmark.testMakingRequest:·heap.used.after                                    avgt   10   19197616.800 ±   3515717.907   bytes
HttpBenchmark.testMakingRequest:·heap.used.before                                   avgt   10    9826125.600 ±    553095.971   bytes
HttpBenchmark.testMakingRequest:·heap.used.change                                   avgt   10    9371491.200 ±   3630360.420   bytes

trask
trask reviewed Apr 16, 2020
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Looks great! A couple of comments below.

benchmark/src/jmh/java/io/opentelemetry/benchmark/HttpBenchmark.java Outdated Show resolved Hide resolved
benchmark/benchmark.gradle
@@ -25,6 +30,7 @@ jmh {

// profilers = ['stack:lines=5;detailLine=true;period=5;excludePackages=true']
// Use profilers to collect additional data. Supported profilers: [cl, comp, gc, stack, perf, perfnorm, perfasm, xperf, xperfasm, hs_cl, hs_comp, hs_gc, hs_rt, hs_thr]
profilers = ['io.opentelemetry.benchmark.UsedMemoryProfiler', 'gc']
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This is cool, I hadn't seen custom profiler before.

benchmark/src/jmh/java/io/opentelemetry/benchmark/UsedMemoryProfiler.java Outdated Show resolved Hide resolved
benchmark/src/jmh/java/io/opentelemetry/benchmark/UsedMemoryProfiler.java Outdated Show resolved Hide resolved
benchmark/src/jmh/java/io/opentelemetry/benchmark/classes/HttpClass.java Outdated Show resolved Hide resolved
benchmark/src/jmh/java/io/opentelemetry/benchmark/classes/HttpClass.java Outdated Show resolved Hide resolved
benchmark/src/jmh/java/io/opentelemetry/benchmark/classes/HttpClass.java Outdated Show resolved Hide resolved
trask
trask approved these changes Apr 17, 2020
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👍

@trask trask merged commit ddb9988 into open-telemetry:master Apr 17, 2020
@pmm-sumo pmm-sumo mentioned this pull request Jun 6, 2021
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@trask trask trask approved these changes

@jkwatson jkwatson Awaiting requested review from jkwatson

@safris safris Awaiting requested review from safris

@tylerbenson tylerbenson Awaiting requested review from tylerbenson

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@pmm-sumo @trask