hg: jdk/jdk15: 8248485: Poor scalability in JfrCheckpointManager when using many threads after JDK-8242008

[markus.gronlund at oracle.com]

Changeset: 578b4bec06e7
Author:    mgronlun
Date:      2020-06-30 19:00 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk15/rev/578b4bec06e7

8248485: Poor scalability in JfrCheckpointManager when using many threads after JDK-8242008
Reviewed-by: egahlin

! src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointManager.cpp
! src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointManager.hpp
! src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointWriter.cpp
! src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointWriter.hpp
! src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeManager.cpp
! src/hotspot/share/jfr/recorder/storage/jfrBuffer.cpp
! src/hotspot/share/jfr/recorder/storage/jfrBuffer.hpp
! src/hotspot/share/jfr/recorder/storage/jfrEpochStorage.hpp
! src/hotspot/share/jfr/recorder/storage/jfrEpochStorage.inline.hpp
! src/hotspot/share/jfr/recorder/storage/jfrMemorySpace.inline.hpp
! src/hotspot/share/jfr/recorder/stringpool/jfrStringPool.cpp
! src/hotspot/share/jfr/utilities/jfrConcurrentLinkedListHost.inline.hpp