Package com.helix.experiments.jit

Class JitCompilationExperiment

java.lang.Object

com.helix.experiments.jit.JitCompilationExperiment

public class JitCompilationExperiment
extends Object

Experiment demonstrating HotSpot Tiered Compilation progression (Tier 0 -> Tier 1-3 C1 -> Tier 4 C2) and inlining size thresholds.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	DEFAULT_FREQ_INLINE_SIZE
static final int	DEFAULT_MAX_INLINE_SIZE

Constructor Summary

Constructors

Constructor	Description
JitCompilationExperiment()

Method Summary

Modifier and Type	Method	Description
CompilationObserver	getObserver()
JitReport	observeCompilationTiers(String methodName, long iterations)	Executes workload iterations and observes tier progression.
JitReport	testInliningLimits(String methodName, int bytecodeSizeBytes, boolean isHotMethod)	Evaluates whether a target method with given bytecode size will be inlined under HotSpot default limits.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

DEFAULT_MAX_INLINE_SIZE

public static final int DEFAULT_MAX_INLINE_SIZE

See Also:

• Constant Field Values

DEFAULT_FREQ_INLINE_SIZE

public static final int DEFAULT_FREQ_INLINE_SIZE

See Also:

• Constant Field Values

Constructor Details

JitCompilationExperiment

public JitCompilationExperiment()

Method Details

observeCompilationTiers

public JitReport observeCompilationTiers(String methodName,
 long iterations)

Executes workload iterations and observes tier progression.

testInliningLimits

public JitReport testInliningLimits(String methodName,
 int bytecodeSizeBytes,
 boolean isHotMethod)

Evaluates whether a target method with given bytecode size will be inlined under HotSpot default limits.

getObserver

public CompilationObserver getObserver()