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Type: Enhancement
Resolution: Fixed
Priority: P4
Fix Version/s: 23
Affects Version/s: 17, 21, 22, 23
Component/s: hotspot
Labels:

Subcomponent:
compiler
Introduced In Version:

22
Resolved In Build:
b06
CPU:

aarch64

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8334219	21.0.5	Dmitry Chuyko	P4	Resolved	Fixed	b01
JDK-8337271	17.0.13	Dmitry Chuyko	P4	Resolved	Fixed	b01

Since ~~JDK-8307352~~, itable stub size has grown by 20 bytes on linux-aarch64. In particular, the "slop-counted" code increases from 100->120 bytes, where the current estimate is 124 bytes. I haven't found a case where it exceeds the estimate. For now this size is stable across the few linux-aarch64 configurations I ran with. It doesn't vary (for example) by different klass decoding schemes. But I think the idea of the estimate is that we can never know. I propose we increase the estimate to be safe.

backported by

JDK-8334219 AArch64: Increase itable stub size estimate

Resolved

JDK-8337271 AArch64: Increase itable stub size estimate

Resolved

relates to

JDK-8207343 Automate vtable/itable stub size calculation

Resolved

JDK-8307352 AARCH64: Improve itable_stub

Resolved

JDK-8323741 Improve automated vtable/itable stub size calculation

Open

links to

Commit openjdk/jdk21u-dev/1831a953

Commit openjdk/jdk/36f4b34f

Commit(master) openjdk/jdk17u-dev/77cb961c

Review openjdk/jdk21u-dev/711

Review openjdk/jdk/17336

Review(master) openjdk/jdk17u-dev/2744

(6 links to)

Assignee:: Yude Lin

Reporter:: Yude Lin

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Created:: 2024-01-07 23:03

Updated:: 2024-08-14 23:56

Resolved:: 2024-01-15 21:17

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