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Type: Bug
Resolution: Fixed
Priority: P3
Fix Version/s: 17
Affects Version/s: 8-shenandoah, 11.0.9, 16, 17
Component/s: hotspot
Labels:

Subcomponent:
gc
Resolved In Build:
b22

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8267779	16u-cpu	Zhengyu Gu	P3	Resolved	Fixed	master
JDK-8267560	16.0.2	Zhengyu Gu	P3	Resolved	Fixed	b06
JDK-8267499	11.0.12	Aleksey Shipilev	P3	Resolved	Fixed	b04

Since ~~JDK-8265239~~, runtime/os/TestTracePageSizes.java fails with Shenandoah like this:

# Internal Error (/home/buildbot/worker/test-jdkX-linux/build/src/hotspot/share/gc/shenandoah/shenandoahHeap.cpp:156), pid=55712, tid=55720
# assert(_num_regions == (max_byte_size / reg_size_bytes)) failed: Must match

This is because Shenandoah region sizes are rounded up to page size only when ShenandoahUncommit is true. In that test configuration, ShenandoahUncommit is false, because Xmx == Xms.

backported by

JDK-8267499 Shenandoah: Round up region size to page size unconditionally

Resolved

JDK-8267560 Shenandoah: Round up region size to page size unconditionally

Resolved

JDK-8267779 Shenandoah: Round up region size to page size unconditionally

Resolved

duplicates

JDK-8266740 Shenandoah: Heap region count calculation still wrong after JDK-8265239

Closed

relates to

JDK-8265239 Shenandoah: Shenandoah heap region count could be off by 1

Resolved

JDK-8268127 Shenandoah: Heap size may be too small for region to align to large page size

Resolved

links to

Commit openjdk/jdk16u/e0060a32

Commit openjdk/jdk/e5d3ee39

Review openjdk/jdk16u/120

Review openjdk/jdk/3945

(1 relates to, 4 links to)

Assignee:: Aleksey Shipilev

Reporter:: Aleksey Shipilev

Votes:: 0 Vote for this issue

Watchers:: 4 Start watching this issue

Created:: 2021-05-10 01:30

Updated:: 2025-01-24 11:09

Resolved:: 2021-05-10 13:29

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