Bug ID: JDK-8136681 Factor out IHOP calculation from G1CollectorPolicy

JDK-8136681 : Factor out IHOP calculation from G1CollectorPolicy

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

Priority: P4
Status: Resolved
Resolution: Fixed

Submitted: 2015-09-17
Updated: 2015-12-10
Resolved: 2015-11-25

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JDK 9
9 b96Fixed

Related Reports

Blocks :	JDK-8136678 - Implement adaptive sizing algorithm for IHOP
Relates :	JDK-8137082 - Factor out G1 prediction code from G1CollectorPolicy and clean up
Relates :	JDK-8143210 - Clean up G1CollectorPolicy using G1CollectorPolicy::PauseKind
Relates :	JDK-8136677 - Adaptive sizing for IHOP in G1

Description

Need to factor out the existing IHOP threshold calculation into a separate class to allow more complex (adaptive) algorithms on demand.

Collect data needed for IHOP calculation and feed it to this class.

Refactor young list target length calculation for G1CollectorPolicy to use less global state.

This is required to accomodate dIHOP changes.

Comments

Will fix as part of the main change. This change does not make sense without the other one.

22-10-2015