Integrated: 8338202: Shenandoah: Improve handshake closure labels

[Aleksey Shipilev]

On Mon, 12 Aug 2024 13:47:28 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Currently, Shenandoah has a few handshakes that have not very clear names, "ShenandoahRendezvous". Would be good to make them more explicit.
> 
> Before:
> 
> 
> Event: 2.593 Executing VM operation: Shenandoah Init Marking
> Event: 2.594 Executing VM operation: Shenandoah Init Marking done
> Event: 2.599 Executing VM operation: HandshakeAllThreads (Shenandoah Flush SATB Handshake)
> Event: 2.599 Executing VM operation: HandshakeAllThreads (Shenandoah Flush SATB Handshake) done
> Event: 2.599 Executing VM operation: HandshakeAllThreads (Shenandoah Flush SATB Handshake)
> Event: 2.599 Executing VM operation: HandshakeAllThreads (Shenandoah Flush SATB Handshake) done
> Event: 2.599 Executing VM operation: Shenandoah Final Mark and Start Evacuation
> Event: 2.600 Executing VM operation: Shenandoah Final Mark and Start Evacuation done
> Event: 2.600 Executing VM operation: HandshakeAllThreads (ShenandoahRendezvous)
> Event: 2.600 Executing VM operation: HandshakeAllThreads (ShenandoahRendezvous) done
> Event: 2.604 Executing VM operation: HandshakeAllThreads (ShenandoahRendezvous)
> Event: 2.604 Executing VM operation: HandshakeAllThreads (ShenandoahRendezvous) done
> Event: 2.605 Executing VM operation: CleanClassLoaderDataMetaspaces
> Event: 2.606 Executing VM operation: CleanClassLoaderDataMetaspaces done
> Event: 2.606 Executing VM operation: Shenandoah Init Update References
> Event: 2.606 Executing VM operation: Shenandoah Init Update References done
> Event: 2.611 Executing VM operation: HandshakeAllThreads (Shenandoah Update Thread Roots)
> Event: 2.611 Executing VM operation: HandshakeAllThreads (Shenandoah Update Thread Roots) done
> Event: 2.611 Executing VM operation: Shenandoah Final Update References
> Event: 2.611 Executing VM operation: Shenandoah Final Update References done 
> 
> 
> After:
> 
> 
> Event: 1.043 Executing VM operation: Shenandoah Init Marking        
> Event: 1.044 Executing VM operation: Shenandoah Init Marking done
> Event: 1.050 Executing VM operation: HandshakeAllThreads (Shenandoah Flush SATB)
> Event: 1.050 Executing VM operation: HandshakeAllThreads (Shenandoah Flush SATB) done
> Event: 1.050 Executing VM operation: HandshakeAllThreads (Shenandoah Flush SATB)
> Event: 1.050 Executing VM operation: HandshakeAllThreads (Shenandoah Flush SATB) done
> Event: 1.050 Executing VM operation: Shenandoah Final Mark and Start Evacuation
> Event: 1.050 Executing VM operation: Shenandoah Final Mark and Start Evacuation done
> Event: 1.051 Executing VM operation: HandshakeAllThreads (Shenandoah Concurrent Weak...

This pull request has now been integrated.

Changeset: ba69ed7c
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/ba69ed7c58fcf99ed18dfd8840125ddcac9460bb
Stats:     7 lines in 5 files changed: 0 ins; 0 del; 7 mod

8338202: Shenandoah: Improve handshake closure labels

Reviewed-by: rkennke, ysr, wkemper

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PR: https://git.openjdk.org/jdk/pull/20549