Bug ID: JDK-8315605 G1: Add number of nmethods in code roots scanning statistics

Type: Enhancement
Component: hotspot
Sub-Component: gc
Affected Version: 22

Priority: P4
Status: Resolved
Resolution: Fixed

Submitted: 2023-09-04
Updated: 2024-04-04
Resolved: 2023-09-08

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JDK 21	JDK 22
21.0.4-oracleFixed	22 b15Fixed

To gauge performance of code root scanning, it is required to have an idea how many code roots from the code roots remsets were scanned during gc.

Fix request [21u] I backport this for parity with 21.0.4-oracle. Medium risk, adding tracing, but in a central component. Clean backport. SAP nightly testing passed.
01-04-2024
A pull request was submitted for review. URL: https://git.openjdk.org/jdk21u-dev/pull/425 Date: 2024-03-29 21:25:33 +0000
29-03-2024
Changeset: 7ef059a7 Author: Thomas Schatzl <tschatzl@openjdk.org> Date: 2023-09-08 08:44:22 +0000 URL: https://git.openjdk.org/jdk/commit/7ef059a75cdd2e96421a165ea1dd8391381bd7b5
08-09-2023
A pull request was submitted for review. URL: https://git.openjdk.org/jdk/pull/15610 Date: 2023-09-07 07:55:29 +0000
07-09-2023

Blocks :	JDK-8030815 - Code roots are not accounted for in region prediction
Relates :	JDK-8326092 - Pause Remark sometimes has extremely long pause times on class unloading
Relates :	JDK-8316428 - G1: Nmethod count statistics only count last code root set iterated