Devoxx 2018 - Async-Profiler, le profiler qu’il vous faut !

async-profiler vous surprendra par sa facilité à faire des flamegraph sur une JVM

Transcript

1. #DevoxxFR Async-Profiler, le profiler qu’il vous faut ! 1
2. #DevoxxFR Qui ? 2 “You Build It, You Run It” Nicolas Peters Lead Tech @nicolaspeters https://github.com/npeters
3. #DevoxxFR 3
4. #DevoxxFR 4
5. #DevoxxFR 5
6. #DevoxxFR 6
7. #DevoxxFR 7
8. #DevoxxFR Big Picture async-profiler JVM Classloader Heap Thread Event libasyncProfiler.so profiler.sh Stack JVMTI attach 8
9. #DevoxxFR Le Profiling de CPU 9
10. #DevoxxFR Profiling de CPU: le Sampling 10 AppServerThreadPoolThread.run() Controller.getContents() RepoDAO.readContents() JsonSerialier.json() Jdbc.execute() Jackson.write() MySql.bind() Temps ???
11. #DevoxxFR perf_event à la rescousse ! 11
12. #DevoxxFR perf_event + AsyncGetCallTrace 12
13. #DevoxxFR Flamegraph >./profiler.sh -d 30 -f /tmp/profile.svg jps 13
14. #DevoxxFR Flamegraph >./profiler.sh -d 30 -f /tmp/profile.svg jps 14
15. #DevoxxFR Le Profiling de Mémoire 15
16. #DevoxxFR Outillage classique pour le GC > jstat -gcutil <pid> 1000 > java -XX:+PrintGCDetails -XX:+PrintGCTimeStamps … 16 > jmap -histo <pid> ou jmap -dump:live,format=b,file=heap.bin
17. #DevoxxFR Async-profiler -e alloc >./profiler.sh -e alloc -d 30 -f /tmp/profile-alloc.svg jps 17
18. #DevoxxFR Le Profiling des points synchronisation 18
19. #DevoxxFR 19
20. #DevoxxFR Async-profiler -e lock >./profiler.sh -e lock -d 30 -f /tmp/profile-lock.svg jps 2 0
21. #DevoxxFR Microbenchmark 21
22. #DevoxxFR Microbenchmark 22 JMH
23. #DevoxxFR JMH > mvn archetype:generate \ -DinteractiveMode=false \ -DarchetypeGroupId=org.openjdk.jmh \ -DarchetypeArtifactId=jmh-java-benchmark-archetype \ -DgroupId=org.sample \ -DartifactId=test \ -Dversion=1.0 23
24. #DevoxxFR JMH public class MyBenchmark { @Benchmark public int testMethod() { ThreadLocalRandom random = ThreadLocalRandom.current(); return random.nextInt() + random.nextInt(); } } > mvn clean install ... > java -jar target/benchmarks.jar -tu ms -prof stack 24
25. #DevoxxFR JMH public class MyBenchmark { @Benchmark public int testMethod() { ThreadLocalRandom random = ThreadLocalRandom.current(); return random.nextInt() + random.nextInt(); } } > mvn clean install ... > java -jar target/benchmarks.jar -tu ms -prof stack 25
26. #DevoxxFR JMH et Async-profiler <dependency> <groupId>pl.project13.scala</groupId> <artifactId>sbt-jmh-extras</artifactId> <version>0.3.2</version> </dependency> > mvn clean install ... > java -jar target/benchmarks.jar -tu ms -prof jmh.extras.Async Konrad Malawski 26
27. #DevoxxFR 27
28. #DevoxxFR 28
29. #DevoxxFR Références 29 • Playlist Youtube https://www.youtube.com/playlist?list=PLTT7JEJqc07b-Bx_GbSy7AU2HRu CmBEBc • The Art of JVM Profiling https://assets.ctfassets.net/oxjq45e8ilak/4mfbX5FJuw0A8M00UK4uKa/ce6 0f2cab12408e01ce927e90ebb2f7a/Andrey_Pangin__Vadim_Tsesko._The_Ar t_of_JVM_Profiling.pdf • Container performance JVM https://www.dropbox.com/s/kp4m0mjr3uo4f54/Container-performance-J VM.pptx?dl=0 • Lightbend https://developer.lightbend.com/blog/2018-04-09-profiling-JVM-applicatio ns/ • Nitsan Wakart http://psy-lob-saw.blogspot.fr/ • Sasha Goldshtein http://blogs.microsoft.co.il/sasha/ • sbt-jmh https://github.com/ktoso/sbt-jmh
30. #DevoxxFR 30 100 Bullets
31. #DevoxxFR Merci / Question 31
32. #DevoxxFR 32
33. #DevoxxFR Overhead 33 The Art of JVM Profiling
34. #DevoxxFR Overhead 34 The Art of JVM Profiling
35. #DevoxxFR Perf vs Async-profiler 35 Container performance JVM
36. #DevoxxFR FlameScope 36
37. #DevoxxFR 3 7