[ovirt-devel] Introducing engine micro-benchmarks

[Martin Sivak]

Hi,

I am just wondering whether you tried Roman's Hystrix integration to
see what command was so slow?

Martin

On Thu, Mar 23, 2017 at 11:05 AM, Roy Golan <rgolan at redhat.com> wrote:
> 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
>
>
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