JDK-8156206 : Use flags fields for JVMCI specific bool fields in JavaThread
  • Type: Enhancement
  • Component: hotspot
  • Sub-Component: compiler
  • Affected Version: 9,10
  • Priority: P4
  • Status: Closed
  • Resolution: Not an Issue
  • Submitted: 2016-05-06
  • Updated: 2022-11-10
  • Resolved: 2022-11-10
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Other
tbdResolved
Related Reports
Blocks :  
JDK-8152311 - [JVMCI] allow JVMCI compiler to change the compilation policy for a method
Relates :  
JDK-8137018 - [JVMCI] Encapsulate new Thread fields for JVMCI
Relates :  
JDK-8219403 - JVMCIRuntime::adjust_comp_level should be replaced
Description
JDK-8152311 adds an extra JVMCI-specific bool field (i.e., _adjusting_comp_level) to JavaThread. This brings the total number of JVMCI-specific bool fields to 3. Up to 16 bytes could be saved (depending on layout used by C++ compiler) per thread if a byte sized _flags field is used instead for these bool fields.
Comments
The _adjusting_comp_level field was removed by JDK-8219403.
10-11-2022
[~dnsimon] JVMCI issue.
10-11-2022