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eclipse-openj9 / openj9

Eclipse OpenJ9: A Java Virtual Machine for OpenJDK that's optimized for small footprint, fast start-up, and high throughput. Builds on Eclipse OMR (https://github.com/eclipse/omr) and combines with the Extensions for OpenJDK for OpenJ9 repo.
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High rate of compilation requests after caches full #20618

Open JamesKingdon opened 2 hours ago

JamesKingdon commented 2 hours ago

Version: reproduced with 17.0.12.1 on Power, but likely applies to all versions and platforms.

While working on https://github.com/eclipse-openj9/openj9/issues/20615 I noticed that after the code caches are marked full performance is degraded well below the rate seen with -Xint, and a possible explanation is that there is a very high rate of compilation request/compilation failure messages generated that show no sign of slowing down. Using verbose option compile* generated just under one million failure messages in a little over 1 minute of runtime:

tail failures.txt
#FAILURE:  t=68025 <WARNING: JIT Compilations are suspended>
#FAILURE:  t=68025 <WARNING: JIT Compilations are suspended>
#FAILURE:  t=68025 <WARNING: JIT Compilations are suspended>
#FAILURE:  t=68025 <WARNING: JIT Compilations are suspended>
#FAILURE:  t=68025 <WARNING: JIT Compilations are suspended>
#FAILURE:  t=68025 <WARNING: JIT Compilations are suspended>
#FAILURE:  t=68025 <WARNING: JIT Compilations are suspended>
#FAILURE:  t=68025 <WARNING: JIT Compilations are suspended>
#FAILURE:  t=68025 <WARNING: JIT Compilations are suspended>
github-actions[bot] commented 2 hours ago

Issue Number: 20618 Status: Open Recommended Components: comp:vm, comp:build, comp:gc