Re: [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

b.DecryptionBenchmark.decryption thrpt 50 101.258

b.DecryptionBenchmark.encryption thrpt 50 238.587

b.DecryptionBenchmark.decryption avgt 50 0.010

b.DecryptionBenchmark.encryption avgt 50 0.004

b.DecryptionBenchmark.decryption sample 5544 0.010

b.DecryptionBenchmark.encryption sample 13067 0.004

b.DecryptionBenchmark.decryption ss 50 0.014

b.DecryptionBenchmark.encryption ss 50 0.009

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