JDK-8231153 : Improve concurrent refinement statistics
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: gc
  • Affected Version: 14
  • Priority: P4
  • Status: Resolved
  • Resolution: Fixed
  • Submitted: 2019-09-17
  • Updated: 2020-02-14
  • Resolved: 2019-10-08
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JDK 14
14 b18Fixed
Related Reports
Relates :  
JDK-8234208 - Logging reports zero total refined cards under "Before GC RS summary"
Relates :  
JDK-8224169 - Cleanup G1DirtyCardQueueSet::num_processed_xxx
Relates :  
JDK-8137022 - Concurrent refinement thread adjustment and (de-)activation suboptimal
Relates :  
JDK-8232232 - G1RemSetSummary::_rs_threads_vtimes is not initialized to zero
Description
Better concurrent refinement statistics are needed in order to improve the control of the concurrent refinement threads and the mutator thread processing of dirty card buffers.  We need estimated card logging rates rates and estimated logged card concurrent processing rates.

Currently the nearest we have is DCQS::processed_buffers_mut, which is not at all sufficient.  And once we have sufficient information, that buffer count should be replaced.
Comments
URL: https://hg.openjdk.java.net/jdk/jdk/rev/d6058bd73982 User: kbarrett Date: 2019-10-08 19:42:30 +0000
08-10-2019