On Thu, 10 Mar 2022 14:29:36 GMT, Joe Darcy <da...@openjdk.org> wrote:
>> Hi @jddarcy , >> >> Test has been modified on the same lines using generic options which >> manipulate compilation thresholds and agnostic to target platforms. >> >> * @run main/othervm -XX:Tier3CompileThreshold=100 >> -XX:CompileThresholdScaling=0.01 -XX:+TieredCompilation RoundTests >> >> Verified that RoundTests::test* methods gets compiled by c2. >> Test execution time with and without change is almost same ~7.80sec over >> Skylake-server. >> >> Regards > > To be more explicit, the existing RoundTests.java test runs in a fraction of > a second. The updated test runs many times slower, even if now under 10 > second, at least on some platforms. > > Can something closer to the original performance be restored? > > As a tier 1 library test, these tests are run quite frequently. Hi @jddarcy , Earlier none of the test methods in RoundTests.java were compiled on account of low invocation count, a loop with 2000 iterations under the influence controlled compilation threshold now triggers tier4 compilation of test points. I did several runs in Skylake machine with patch and without patch and could see no perceptible difference in runtime due to modification. I have further reduced the invocation count and compile threshold. Thanks ------------- PR: https://git.openjdk.java.net/jdk/pull/7094
