STMBench7 implementation on ScalaSTM

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Feb 2, 2013, 7:23:13 PM2/2/13

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Hi,

I am try to implement STMBench7 on ScalaSTM, I am using the codes that you provided https://github.com/nbronson/scala-stm/tree/master/src/test/scala/stmbench7/scalastm.

And the command I typed is as follow:

scala -cp lib/stmbench7-VELOX-1.2.jar:target/scala-2.10/classes:target/scala-2.10/test-classes stmbench7.Benchmark -s stmbench7.scalastm.ScalaSTMInitializer -t 16 -l 60 -w r --no-traversals -g stm

However, I got some error messages when I ran it.

-------------------------Here is the error message I got.-------------------------------------------------

MacBook-Air:scala-stm user$ JAVA_OPTS="-Xmx2059M" scala -cp lib/stmbench7-VELOX-1.2.jar:target/scala-2.10/classes:target/scala-2.10/test-classes stmbench7.Benchmark -s stmbench7.scalastm.ScalaSTMInitializer -t 16 -l 60 -w r --no-traversals -g stm
===============================================================================
The STMBench7 Benchmark (Java version)
A benchmark for comparing synchronization techniques
Version: 1.0(15.02.2011)
More information: http://lpd.epfl.ch/site/research/tmeval
Copyright (C) 2006-2008 LPD, I&C, EPFL (http://lpd.epfl.ch)
Implemented by Michal Kapalka (http://kapalka.eu)
Updated by Vincent Gramoli for compliance with the VELOX stack
===============================================================================

-------------------------------------------------------------------------------
Benchmark parameters
-------------------------------------------------------------------------------
Number of threads: 16
Length: 60 s
Workload: READ_DOMINATED
Synchronization method: STM
Long traversals disabled
Structural modification operations enabled
DesignObjFactory: stmbench7.scalastm.ScalaSTMInitializer$$anon$4
BackendFactory: stmbench7.scalastm.ScalaSTMInitializer$$anon$3
OperationExecutorFactory: stmbench7.scalastm.ScalaSTMInitializer$$anon$1
ThreadFactory: stmbench7.scalastm.ScalaSTMInitializer$$anon$5
Sequential replay disabled
STM-specific parameters: none

Operation ratios [%]:
              TRAVERSAL: 0.00
           TRAVERSAL_RO: 0.00
        SHORT_TRAVERSAL: 4.65
     SHORT_TRAVERSAL_RO: 41.86
              OPERATION: 5.23
           OPERATION_RO: 47.09
STRUCTURAL_MODIFICATION: 1.16

Setup start...
Setting up the design library:
Component 500 of 500
Setting up the module:
Exception in thread "Thread-1" java.lang.ClassCastException: scala.collection.immutable.RedBlackTree$BlackTree cannot be cast to scala.collection.immutable.RedBlack$Tree
	at stmbench7.scalastm.IndexImpl$BoxedImmutable.stmbench7$scalastm$IndexImpl$BoxedImmutable$$makeValuesIterator(IndexImpl.scala:45)
	at stmbench7.scalastm.IndexImpl$BoxedImmutable.iterator(IndexImpl.scala:33)
	at stmbench7.operations.SetupDataStructure.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.OperationExecutorFactory$1.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Setup completed.

Benchmark started.
Exception in thread "Thread-2" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-3" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-8" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-7" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-6" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-5" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-14" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-4" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-13" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-12" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-11" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-10" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-9" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-17" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-16" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Exception in thread "Thread-15" java.lang.NullPointerException
	at stmbench7.operations.ShortTraversal1.traverse(Unknown Source)
	at stmbench7.operations.ShortTraversal1.performOperation(Unknown Source)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:21)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2$$anonfun$execute$1.apply(ScalaSTMInitializer.scala:20)
	at scala.concurrent.stm.ccstm.InTxnImpl.runBlock(InTxnImpl.scala:560)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAttempt(InTxnImpl.scala:516)
	at scala.concurrent.stm.ccstm.InTxnImpl.topLevelAtomicImpl(InTxnImpl.scala:387)
	at scala.concurrent.stm.ccstm.InTxnImpl.atomic(InTxnImpl.scala:248)
	at scala.concurrent.stm.ccstm.CCSTMExecutor.apply(CCSTMExecutor.scala:24)
	at stmbench7.scalastm.ScalaSTMInitializer$$anon$1$$anon$2.execute(ScalaSTMInitializer.scala:20)
	at stmbench7.BenchThread.run(Unknown Source)
	at java.lang.Thread.run(Thread.java:680)
Benchmark completed.

-------------------------------------------------------------------------------
Detailed results
-------------------------------------------------------------------------------
Operation   T1:   successful = 0	maxttc = 0	failed = 0
Operation  T2a:   successful = 0	maxttc = 0	failed = 0
Operation  T2b:   successful = 0	maxttc = 0update	failed = 0
Operation  T2c:   successful = 0	maxttc = 0	failed = 0
Operation  T3a:   successful = 0	maxttc = 0	failed = 0
Operation  T3b:   successful = 0	maxttc = 0	failed = 0
Operation  T3c:   successful = 0	maxttc = 0	failed = 0
Operation   T4:   successful = 0	maxttc = 0	failed = 0
Operation   T5:   successful = 0	maxttc = 0	failed = 0
Operation   T6:   successful = 0	maxttc = 0	failed = 0
Operation   Q6:   successful = 0	maxttc = 0	failed = 0
Operation   Q7:   successful = 0	maxttc = 0	failed = 0
Operation  ST1:   successful = 0	maxttc = 0	failed = 0
Operation  ST2:   successful = 0	maxttc = 0	failed = 0
Operation  ST3:   successful = 0	maxttc = 0	failed = 0
Operation  ST4:   successful = 0	maxttc = 0	failed = 0
Operation  ST5:   successful = 0	maxttc = 0	failed = 0
Operation  ST6:   successful = 0	maxttc = 0	failed = 0
Operation  ST7:   successful = 0	maxttc = 0	failed = 0
Operation  ST8:   successful = 0	maxttc = 0	failed = 0
Operation  ST9:   successful = 0	maxttc = 0	failed = 0
Operation ST10:   successful = 0	maxttc = 0	failed = 0
Operation  OP1:   successful = 0	maxttc = 0	failed = 0
Operation  OP2:   successful = 0	maxttc = 0	failed = 0
Operation  OP3:   successful = 0	maxttc = 0	failed = 0
Operation  OP4:   successful = 0	maxttc = 0	failed = 0
Operation  OP5:   successful = 16	maxttc = 1	failed = 0
Operation  OP6:   successful = 0	maxttc = 0	failed = 0
Operation  OP7:   successful = 0	maxttc = 0	failed = 0
Operation  OP8:   successful = 0	maxttc = 0	failed = 0
Operation  OP9:   successful = 0	maxttc = 0	failed = 0
Operation OP10:   successful = 0	maxttc = 0	failed = 0
Operation OP11:   successful = 0	maxttc = 0	failed = 0
Operation OP12:   successful = 0	maxttc = 0	failed = 0
Operation OP13:   successful = 0	maxttc = 0	failed = 0
Operation OP14:   successful = 0	maxttc = 0	failed = 0
Operation OP15:   successful = 0	maxttc = 0	failed = 0
Operation  SM1:   successful = 0	maxttc = 0	failed = 0
Operation  SM2:   successful = 0	maxttc = 0	failed = 0
Operation  SM3:   successful = 0	maxttc = 0	failed = 0
Operation  SM4:   successful = 0	maxttc = 0	failed = 0
Operation  SM5:   successful = 0	maxttc = 0	failed = 0
Operation  SM6:   successful = 0	maxttc = 0	failed = 0
Operation  SM7:   successful = 0	maxttc = 0	failed = 0
Operation  SM8:   successful = 0	maxttc = 0	failed = 0

-------------------------------------------------------------------------------
Sample errors (operation ratios [%])
-------------------------------------------------------------------------------
              TRAVERSAL:  expected = 0.00	successful = 0.00	error = 0.00	(total = 0.00	error = 0.00)
           TRAVERSAL_RO:  expected = 0.00	successful = 0.00	error = 0.00	(total = 0.00	error = 0.00)
        SHORT_TRAVERSAL:  expected = 4.65	successful = 0.00	error = 4.65	(total = 0.00	error = 4.65)
     SHORT_TRAVERSAL_RO:  expected = 41.86	successful = 0.00	error = 41.86	(total = 0.00	error = 41.86)
              OPERATION:  expected = 5.23	successful = 0.00	error = 5.23	(total = 0.00	error = 5.23)
           OPERATION_RO:  expected = 47.09	successful = 100.00	error = 52.91	(total = 100.00	error = 52.91)
STRUCTURAL_MODIFICATION:  expected = 1.16	successful = 0.00	error = 1.16	(total = 0.00	error = 1.16)

-------------------------------------------------------------------------------
Summary results
-------------------------------------------------------------------------------
              TRAVERSAL:  successful = 0	maxttc = 0	failed = 0	total = 0
           TRAVERSAL_RO:  successful = 0	maxttc = 0	failed = 0	total = 0
        SHORT_TRAVERSAL:  successful = 0	maxttc = 0	failed = 0	total = 0
     SHORT_TRAVERSAL_RO:  successful = 0	maxttc = 0	failed = 0	total = 0
              OPERATION:  successful = 0	maxttc = 0	failed = 0	total = 0
           OPERATION_RO:  successful = 16	maxttc = 1	failed = 0	total = 16
STRUCTURAL_MODIFICATION:  successful = 0	maxttc = 0	failed = 0	total = 0

Total sample error: 105.81% (105.81% including failed)
Total throughput: 0.27 op/s (0.27 op/s including failed)
Elapsed time: 60.01 s

Can you tell me how to solve this problem? Thanks.

-Lixing

Nathan Bronson

unread,

Feb 2, 2013, 10:41:00 PM2/2/13

to scala-stm-e...@googlegroups.com

In Scala < 2.10 the immutable.TreeMap's iterator produced a lot of garbage, which substantially impacted the STMBench7 results. I hacked in an array-based iterator sufficient for the benchmark's one use case, but to do that I operated on the internal tree representation (see the ugliness starting at https://github.com/nbronson/scala-stm/blob/master/src/test/scala/stmbench7/scalastm/IndexImpl.scala#L44 ).

Scala 2.10 fixed the perf bug and changed the internal implementation, so the hack now throws an exception.

I've pushed a fix and published a new 0.8-SNAPSHOT release to oss.sonatype.org.

You will probably also need to prefix your command with JAVA_OPTS=-Xmx... to avoid out-of-memory problems. I'm not sure the smallest sufficient value, but -Xmx1500m is enough.

Thanks,

Nathan

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