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belliottsmith pushed a change to branch cassandra-6.0
in repository https://gitbox.apache.org/repos/asf/cassandra.git


    from c9d60a61e3 Offline tool for working with cluster metadata dump files
     add a0dc6f857b Introduce AccordExecutorSignalLoop that aims to reduce lock 
contention:  - consumer and producer threads wait signal without acquiring the 
lock first  - lock owners may prepare more work than they need, moving some 
dynamically-adjusted portion of the work from the prioritised lock-managed 
structures onto a non-blocking queue, so that other threads may consume work 
from there; the portion is continually micro-adjusted to target some available 
work whenever the lock is a [...]

No new revisions were added by this update.

Summary of changes:
 .build/checkstyle.xml                              |   6 +
 modules/accord                                     |   2 +-
 .../org/apache/cassandra/config/AccordConfig.java  |  39 +
 src/java/org/apache/cassandra/config/Config.java   |   1 -
 .../cassandra/config/DatabaseDescriptor.java       |  46 +-
 .../service/accord/AccordCommandStore.java         |  40 +-
 .../service/accord/AccordCommandStores.java        |  61 +-
 .../cassandra/service/accord/AccordExecutor.java   | 231 +++---
 .../accord/AccordExecutorAbstractLockLoop.java     |  62 +-
 .../service/accord/AccordExecutorAbstractLoop.java | 139 ++++
 .../AccordExecutorAbstractSemiSyncSubmit.java      |   4 +-
 .../service/accord/AccordExecutorAsyncSubmit.java  |   4 +-
 .../service/accord/AccordExecutorLoops.java        |   6 +-
 .../accord/AccordExecutorSemiSyncSubmit.java       |   4 +-
 .../service/accord/AccordExecutorSignalLoop.java   | 472 ++++++++++++
 .../service/accord/AccordExecutorSimple.java       |  10 +-
 .../service/accord/AccordExecutorSyncSubmit.java   |   8 +-
 .../service/accord/AccordObjectSizes.java          |  44 +-
 .../cassandra/service/accord/AccordResult.java     |  20 +-
 .../cassandra/service/accord/AccordService.java    |  12 +-
 .../cassandra/service/accord/AccordTask.java       |  24 +-
 .../service/accord/debug/DebugExecution.java       |  99 ++-
 .../service/accord/interop/AccordInteropApply.java |  10 +-
 .../accord/interop/AccordInteropPersist.java       |   2 +-
 .../accord/serializers/ApplySerializers.java       |   6 +-
 .../accord/serializers/CheckStatusSerializers.java |   4 +-
 .../accord/serializers/ResultSerializers.java      |  12 +-
 .../cassandra/service/accord/txn/TxnData.java      |   2 +-
 .../cassandra/service/accord/txn/TxnResult.java    |   8 +
 .../cassandra/utils/concurrent/SignalLock.java     | 798 +++++++++++++++++++++
 .../distributed/test/accord/AccordLoadTest.java    | 243 ++++++-
 .../fuzz/topology/AccordBootstrapTest.java         |   2 +-
 .../fuzz/topology/AccordTopologyMixupTest.java     |   2 +-
 .../topology/HarryOnAccordTopologyMixupTest.java   |   2 +-
 .../simulator/test/AccordExecutorTest.java         | 164 +++++
 .../db/virtual/AccordDebugKeyspaceTest.java        |   2 +-
 .../apache/cassandra/hints/HintsServiceTest.java   |   2 +-
 .../service/accord/AccordCommandStoreTest.java     |   4 +-
 .../cassandra/service/accord/AccordTestUtils.java  |   9 +-
 .../cassandra/service/accord/EpochSyncTest.java    |   4 +-
 .../serializers/CommandsForKeySerializerTest.java  |   3 +-
 .../apache/cassandra/utils/AccordGenerators.java   |   4 +-
 42 files changed, 2244 insertions(+), 373 deletions(-)
 create mode 100644 
src/java/org/apache/cassandra/service/accord/AccordExecutorAbstractLoop.java
 create mode 100644 
src/java/org/apache/cassandra/service/accord/AccordExecutorSignalLoop.java
 create mode 100644 
src/java/org/apache/cassandra/utils/concurrent/SignalLock.java
 create mode 100644 
test/simulator/test/org/apache/cassandra/simulator/test/AccordExecutorTest.java


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