[ovirt-devel] Introducing engine micro-benchmarks

Lately we came across an interesting case where multi-host+mult-networks resulted editing a host to conclude in minutes. One assumption that was raised which we wanted to eliminate was that the decryption we perform on a fence agent password might be taking too long. So these days it's an easy task thanks to JMH[1], supplied by the jdk itself. I kickstarted [2] and added a 'DecryptionBenchmark', see the output as an example[3] Although The JMH project recommends to create a separate project I find it would be less trivial to people to contribute benchmarks let alone just playing around with current code they want to test. - So, (when it will be merged) you add your benchmark under backend/manager/modules/benchmarks/MyBenchmark.java - run it from intellij using the jmh plugin exactly like a unit-test OR - mvn test -P benchmarks -pl org.ovirt.engine:benchmarks OR - java -jar benchmarks.jar I hope this would serve all of us well, please review and add your benchmarks. PS - this will not run in the CI atm. [1] http://openjdk.java.net/projects/code-tools/jmh/ [2] https://gerrit.ovirt.org/74537 microbenchmarks: Introduce microbenchmarks using JMH [3] DecryptionBenchmark output (short version): # Run complete. Total time: 00:09:06 Benchmark Mode Samples Score Score error Units b.DecryptionBenchmark.decryption thrpt 50 101.258 1.270 ops/s b.DecryptionBenchmark.encryption thrpt 50 238.587 4.667 ops/s b.DecryptionBenchmark.decryption avgt 50 0.010 0.000 s/op b.DecryptionBenchmark.encryption avgt 50 0.004 0.000 s/op b.DecryptionBenchmark.decryption sample 5544 0.010 0.000 s/op b.DecryptionBenchmark.encryption sample 13067 0.004 0.000 s/op b.DecryptionBenchmark.decryption ss 50 0.014 0.001 s b.DecryptionBenchmark.encryption ss 50 0.009 0.001 s Process finished with exit code 0