Bug ID: JDK-8078555 GC: implement ranges (optionally constraints) for those flags that have them missing

JDK-8078555 : GC: implement ranges (optionally constraints) for those flags that have them missing

Type: Sub-task
Component: hotspot
Sub-Component: gc
Affected Version: 9

Priority: P2
Status: Resolved
Resolution: Fixed

Submitted: 2015-04-23
Updated: 2016-08-22
Resolved: 2015-09-01

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JDK 9
9 b83Fixed

Related Reports

Blocks :	JDK-8130459 - Add additional validation after heap creation
Cloners :	JDK-8134995 - [REDO] GC: implement ranges (optionally constraints) for those flags that have them missing
Duplicate :	JDK-8071863 - Validate G1 options that are expressed as percentages
Duplicate :	JDK-8029527 - GC specific flag verification happens before we decide which GC to use
Relates :	JDK-8134856 - Incorrect use of PLAB::min_size() in MaxPLABSizeBounds
Relates :	JDK-8134857 - Inconsistency in maximum TLAB/PLAB size and humonguous object size
Relates :	JDK-8134858 - Remove G1 specific checking of Young/OldPLABSize in G1CollectorPolicy constructor
Relates :	JDK-8142341 - GC: current flags need ranges to be implemented
Relates :	JDK-8133565 - GC - 2nd followup to JDK-8059557
Relates :	JDK-8134972 - [BACKOUT] GC: implement ranges (optionally constraints) for those flags that have them missing
Relates :	JDK-8133564 - Runtime - 2nd followup to Validate JVM Command-Line Flag Arguments
Relates :	JDK-8141641 - Runtime: implement range for ErrorLogTimeout
Relates :	JDK-8059557 - JEP 245: Validate JVM Command-Line Flag Arguments

Description

JDK-8059557 (P1) added a new feature that automatically checks ranges for those flags that can take a value between ranges. Need to implement ranges (and optionally constraints) for those flags that need them.

Comments

Currently there is a workaround in place for "java -XX:+UseConcMarkSweepGC" which sets InitialTenuringThreshold to 7 but leaves MaxTenuringThreshold remaining at 6 and therefore invalidates the constraints. Please see "UseConcMarkSweepGCWorkaroundIfNeeded" in constraintFunctions.cpp for the workaround and kindly remove it once the issue is fixed.

24-04-2015