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Type: Bug
Resolution: Fixed
Priority: P3
Fix Version/s: 22
Affects Version/s: 17.0.9, 21.0.1, 22
Component/s: hotspot
Labels:

Subcomponent:
runtime
Introduced In Build:
b11
Resolved In Build:
b27

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8326985	21.0.4-oracle	Calvin Cheung	P3	Resolved	Fixed	b01
JDK-8328502	21.0.4	Oli Gillespie	P3	Resolved	Fixed	b01
JDK-8333441	17.0.13	Oli Gillespie	P3	Resolved	Fixed	b01

Dacapo pmd benchmark (`java -jar dacapo-9.12-MR1.jar --size large --iterations 20 pmd`) regressed 5-20% on all platforms.

This is caused by ~~JDK-8313678~~, which fixed a symbol leak, but the leak was actually beneficial to performance in some cases as it allowed cheap temp symbol re-use instead of churning symbols with the associated cleanup and recreation cost.

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8315559-flame-comparison.png
264 kB
2023-10-12 08:56
symbol-delay-queue.patch
5 kB
2023-10-26 03:00

backported by

JDK-8326985 Delay TempSymbol cleanup to avoid symbol table churn

Resolved

JDK-8328502 Delay TempSymbol cleanup to avoid symbol table churn

Resolved

JDK-8333441 Delay TempSymbol cleanup to avoid symbol table churn

Resolved

relates to

JDK-8313678 SymbolTable can leak Symbols during cleanup

Resolved

JDK-8321276 runtime/cds/appcds/dynamicArchive/DynamicSharedSymbols.java failed with "'17 2: jdk/test/lib/apps ' missing from stdout/stderr"

Closed

links to

Commit openjdk/jdk17u-dev/1b807f91

Commit openjdk/jdk21u-dev/06e4cf37

Commit openjdk/jdk/d23f4f12

Review openjdk/jdk17u-dev/2424

Review openjdk/jdk21u-dev/154

Review openjdk/jdk/16398

(6 links to)

Assignee:: Oli Gillespie

Reporter:: Eric Caspole

Votes:: 0 Vote for this issue

Watchers:: 9 Start watching this issue

Created:: 2023-09-01 12:27

Updated:: 2024-06-03 07:34

Resolved:: 2023-12-04 04:27

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