Bug ID: JDK-8352251 Implement JEP 518: JFR Cooperative Sampling

JDK-8352251 : Implement JEP 518: JFR Cooperative Sampling

Type: Sub-task
Component: hotspot
Sub-Component: jfr

Priority: P2
Status: Resolved
Resolution: Fixed

Submitted: 2025-03-18
Updated: 2025-09-29
Resolved: 2025-05-26

Versions (Unresolved/Resolved/Fixed)

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Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.

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JDK 25
25 b25Fixed

Related Reports

Blocks :	JDK-8316239 - JFR: fatal error: refcount has gone to zero
Blocks :	JDK-8302350 - JfrThreadSampler failed with "assert((is_native() && bci == 0) \|\| (!is_native() && 0 <= bci && bci < code_size())) failed: illegal bci: 0 for non-native method"
Blocks :	JDK-8343003 - assert(lower->pc_offset() < pc_offset) failed: sanity
Blocks :	JDK-8321822 - ZGC: SIGSEGV in "JFR Recorder Thread"
Causes :	JDK-8360306 - RISC-V: Cross build fails due to GCC13 warning stringop-overflow after JDK-8352251
Causes :	JDK-8357829 - Commented out sample limit in JfrSamplerThread::task_stacktrace
Causes :	JDK-8357830 - JfrVframeStream::_cont_entry shadows super-class field
Causes :	JDK-8360312 - Serviceability Agent tests fail with JFR enabled due to unknown thread type JfrRecorderThread
Causes :	JDK-8357832 - Shenandoah: Fill out JfrVframeStream walk_continuation comment
Causes :	JDK-8360201 - JFR: Initialize JfrThreadLocal::_sampling_critical_section
Duplicate :	JDK-8316239 - JFR: fatal error: refcount has gone to zero
Duplicate :	JDK-8321822 - ZGC: SIGSEGV in "JFR Recorder Thread"
Duplicate :	JDK-8302350 - JfrThreadSampler failed with "assert((is_native() && bci == 0) \|\| (!is_native() && 0 <= bci && bci < code_size())) failed: illegal bci: 0 for non-native method"
Duplicate :	JDK-8321098 - Cooperative JFR Sampling
Duplicate :	JDK-8150425 - Deadlock potential when sampling suspended threads
Duplicate :	JDK-8343003 - assert(lower->pc_offset() < pc_offset) failed: sanity
Duplicate :	JDK-8357087 - JfrThreadSampler crash: SEGV in PcDescCache::find_pc_desc
Duplicate :	JDK-8357087 - JfrThreadSampler crash: SEGV in PcDescCache::find_pc_desc
Relates :	JDK-8168445 - make pd_get_top_frame_for_profiling more robust
Relates :	JDK-8356587 - Missing object ID X in pool jdk.types.Method
Relates :	JDK-8358429 - JFR: minimize the time the Threads_lock is held for sampling
Relates :	JDK-8368844 - JFR: Improve sampling accuracy
Relates :	JDK-8357810 - [s390x] Port JEP 518 - JFR Cooperative Sampling

Description

See JDK-8350338 and the attached document.

Comments

Changeset: bbceab07 Branch: master Author: Markus Grönlund <mgronlun@openjdk.org> Date: 2025-05-26 18:37:55 +0000 URL: https://git.openjdk.org/jdk/commit/bbceab072555d5e2f5d3e99ae07a5ca5e909d7dc

26-05-2025

A pull request was submitted for review. Branch: master URL: https://git.openjdk.org/jdk/pull/24296 Date: 2025-03-28 15:38:59 +0000

28-03-2025