JDK-8134607 : Remove per-compiler performance counters
- Type: Enhancement
- Component: hotspot
- Sub-Component: compiler
- Affected Version: 9
- Priority: P4
- Status: Resolved
- Resolution: Fixed
- OS: generic
- CPU: generic
- Submitted: 2015-08-27
- Updated: 2017-05-17
- Resolved: 2015-10-12
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| JDK 9 |
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9 b89Fixed  |
Sub Tasks
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JDK-8177126 :
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Description
The per-thread performance counters for compiler threads have relatively little value in the presence of more fine-grained and precise compilation events and should be considered for removal. A quick survey indicates there is little or no usage of these counters: sun.ci.compilerThread.#.compiles sun.ci.compilerThread.#.method sun.ci.compilerThread.#.time sun.ci.compilerThread.#.type Removing these counters would ensure that the number of perf counters which write to the PerfData memory buffer is invariant with JVM scale factors (#CPU, #threads etc)
Comments
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