Roller Coaster Last updated: January 19, 2003

Roller Coaster is a Java implementation of the famous Roller Coaster problem. It is intended to be a highly concurrent benchmarks, suitable for synchronization and concurrency measurements. This instance used a total of 7 passenger threads, and ran for 50 iterations of the main loop (i.e. 50 rides).

Metrics

• base.allocatedBytes.value: 1114104
• base.allocations.value: 8204
• base.executedInstructions.value: 2489349
• base.methods.value: 168021
• base.loadedClasses.value: 388
• memory.byteAllocationDensity.value: 447.548
• memory.objectAllocationDensity.value: 3.296
• memory.averageObjectSize.value: 135.800
• memory.averageObjectSize.bin:
  
  

  From	To	Value
  8	8	0.003
  16	16	0.102
  24	24	0.346
  32	32	0.060
  40	40	0.111
  48	72	0.267
  80	136	0.075
  144	392	0.028
  400	+Inf	0.008

  
  
• polymorphism.callSites.value: 544
• polymorphism.receiverArity.bin:
  
  

  From	To	Value
  1	1	0.974
  2	2	0.020
  3	+Inf	0.006

  
  
• polymorphism.targetArity.bin:
  
  

  From	To	Value
  1	1	0.987
  2	2	0.011
  3	+Inf	0.002

  
  
• polymorphism.receiverArityCalls.bin:
  
  

  From	To	Value
  1	1	0.978
  2	2	0.011
  3	+Inf	0.003

  
  
• polymorphism.targetArityCalls.bin:
  
  

  From	To	Value
  1	1	0.989
  2	2	0.001
  3	+Inf	0.002

  
  
• polymorphism.receiverPolyDensity.value: 0.026
• polymorphism.targetPolyDensity.value: 0.013
• polymorphism.receiverCacheMissRate.value: 0.008
• polymorphism.targetCacheMissRate.value: 0.006
• polymorphism.callSites.value (Application Only): 30
• polymorphism.receiverArity.bin (Application Only):
  
  

  From	To	Value
  1	1	1.000
  2	2	0.000
  3	+Inf	0.000

  
  
• polymorphism.targetArity.bin (Application Only):
  
  

  From	To	Value
  1	1	1.000
  2	2	0.000
  3	+Inf	0.000

  
  
• polymorphism.receiverArityCalls.bin (Application Only):
  
  

  From	To	Value
  1	1	1.000
  2	2	0.000
  3	+Inf	0.000

  
  
• polymorphism.targetArityCalls.bin (Application Only):
  
  

  From	To	Value
  1	1	1.000
  2	2	0.000
  3	+Inf	0.000

  
  
• polymorphism.receiverPolyDensity.value (Application Only): 0.000
• polymorphism.targetPolyDensity.value (Application Only): 0.000
• polymorphism.receiverCacheMissRate.value (Application Only): 0.001
• polymorphism.targetCacheMissRate.value (Application Only): 0.001
• size.load.value: 386
• size.run.value: 311
• size.hot.value: 25
• size.hot.percentile: 0.080
• concurrency.lockDensity.value: 1.548
• concurrency.lockContendedDensity.value: 0.007
• concurrency.lock.percentile: 0.360
• concurrency.lockContended.percentile: 0.875
• data.floatDensity.value: 0.537
• data.arrayDensity.value: 40.940

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