Package com.victorvalentim.zividomelive.performance

Enum Class GpuTimerPolicy

java.lang.Object

java.lang.Enum<GpuTimerPolicy>

com.victorvalentim.zividomelive.performance.GpuTimerPolicy

All Implemented Interfaces:

Serializable, Comparable<GpuTimerPolicy>, Constable

public enum GpuTimerPolicy
extends Enum<GpuTimerPolicy>

Policy controlling experimental OpenGL GPU measurement backend selection.

API stability: Experimental.

Since:

2.0.0

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Enum

Enum.EnumDesc<E extends Enum<E>>

Enum Constant Summary

Enum Constants

Enum Constant	Description
ARCHITECTURE_AWARE	Enables the complete capability-driven fallback chain for controlled benchmarks.
SAFE	Uses timestamp pairs only, avoiding ownership of the global elapsed-query target.
TIME_ELAPSED_EXCLUSIVE	Explicitly requests the exclusive elapsed-query backend for controlled diagnostics.

Method Summary

Modifier and Type	Method	Description
boolean	allowsElapsedFallback()
boolean	allowsFenceFallback()
GpuTimerBackend	selectBackend(GpuTimerArchitecture architecture, int timestampCounterBits, int elapsedCounterBits)	Selects the first timer-query candidate from runtime counter capabilities.
static GpuTimerPolicy	valueOf(String name)	Returns the enum constant of this class with the specified name.
static GpuTimerPolicy[]	values()	Returns an array containing the constants of this enum class, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Details

SAFE

public static final GpuTimerPolicy SAFE

Uses timestamp pairs only, avoiding ownership of the global elapsed-query target.

ARCHITECTURE_AWARE

public static final GpuTimerPolicy ARCHITECTURE_AWARE

Enables the complete capability-driven fallback chain for controlled benchmarks.

Selection is capability-driven: timestamp pairs are preferred, elapsed queries are the timer fallback, and the runtime measurement layer may use fence completion when both timer paths are unavailable or fail qualification. GpuTimerArchitecture remains metadata and is not treated as proof that a backend is reliable.

TIME_ELAPSED_EXCLUSIVE

public static final GpuTimerPolicy TIME_ELAPSED_EXCLUSIVE

Explicitly requests the exclusive elapsed-query backend for controlled diagnostics.

Method Details

values

public static GpuTimerPolicy[] values()

Returns an array containing the constants of this enum class, in the order they are declared.

Returns:

an array containing the constants of this enum class, in the order they are declared

valueOf

public static GpuTimerPolicy valueOf(String name)

Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum class has no constant with the specified name

NullPointerException - if the argument is null

selectBackend

public GpuTimerBackend selectBackend(GpuTimerArchitecture architecture,
 int timestampCounterBits,
 int elapsedCounterBits)

Selects the first timer-query candidate from runtime counter capabilities.

This method selects a candidate only. Runtime qualification is responsible for deciding whether the candidate is trustworthy on the active driver/context.

Parameters:

architecture - normalized host architecture recorded as benchmark metadata

timestampCounterBits - counter bits reported for GL_TIMESTAMP

elapsedCounterBits - counter bits reported for GL_TIME_ELAPSED

Returns:

selected timer candidate, or GpuTimerBackend.NONE

allowsElapsedFallback

public boolean allowsElapsedFallback()

Returns:

whether a failed timestamp candidate may fall back to an elapsed query

allowsFenceFallback

public boolean allowsFenceFallback()

Returns:

whether failed/unavailable timer queries may fall back to fence completion