llvm::HardwareUnitInfo Class Reference

HardwareUnitInfo is a wrapper class which maps to some real hardware resource. More...

#include "Target/AMDGPU/AMDGPUCoExecSchedStrategy.h"

Public Member Functions
	HardwareUnitInfo ()
unsigned	size ()
unsigned	getTotalCycles ()
void	setType (unsigned TheType)
AMDGPU::InstructionFlavor	getType () const
bool	producesCoexecWindow () const
void	setProducesCoexecWindow (bool Val)
bool	contains (SUnit *SU) const
SUnit *	getHigherPriority (SUnit *SU, SUnit *Other) const
void	reset ()
SUnit *	getNextTargetSU (bool LookDeep=false) const
void	insert (SUnit *SU, unsigned BlockingCycles)
	Insert the SU into AllSUs and account its BlockingCycles into the TotalCycles.
void	markScheduled (SUnit *SU, unsigned BlockingCycles)
	Update the state for SU being scheduled by removing it from the AllSUs and reducing its BlockingCycles from the TotalCycles.

Detailed Description

HardwareUnitInfo is a wrapper class which maps to some real hardware resource.

This is used to model hardware resource pressure per region, and guide scheduling heuristics.

Definition at line 57 of file AMDGPUCoExecSchedStrategy.h.

Constructor & Destructor Documentation

HardwareUnitInfo()

llvm::HardwareUnitInfo::HardwareUnitInfo ( )

inline

Definition at line 80 of file AMDGPUCoExecSchedStrategy.h.

Member Function Documentation

contains()

bool llvm::HardwareUnitInfo::contains ( SUnit * SU ) const

inline

Definition at line 97 of file AMDGPUCoExecSchedStrategy.h.

Referenced by llvm::CandidateHeuristics::tryCriticalResource().

getHigherPriority()

SUnit * llvm::HardwareUnitInfo::getHigherPriority ( SUnit * SU, SUnit * Other ) const

inline

Returns

the SUnit with higher priority or nullptr if they are the same. This method looks through the PrioritySUs to determine if one SU is more prioritized than the other. If neither are in the PrioritySUs list, then neither have priority over each other.

Definition at line 103 of file AMDGPUCoExecSchedStrategy.h.

References llvm::Other.

Referenced by llvm::CandidateHeuristics::tryCriticalResource().

getNextTargetSU()

SUnit * HardwareUnitInfo::getNextTargetSU

(

bool

LookDeep = false

)

const

Returns

the next SU in PrioritySUs that is not ready. If LookDeep is set, we will look beyond the PrioritySUs (if all the PrioritySUs are ready) to AllSUs to attempt to find a target SU. When looking through AllSUs we sort pick the target SU by minimal depth for top-down scheduling. getNextTargetSU is useful for determining which SU on this HardwareUnit we are trying to schedule - this info helps us determine which dependencies to schedule. LookDeep is useful if the dependencies are long latency (e.g. memory instructions). If we have many long latency dependencies, it is beneficial to enable SUs multiple levels ahead.

Definition at line 87 of file AMDGPUCoExecSchedStrategy.cpp.

Referenced by llvm::CandidateHeuristics::tryCriticalResourceDependency().

getTotalCycles()

unsigned llvm::HardwareUnitInfo::getTotalCycles ( )

inline

Definition at line 84 of file AMDGPUCoExecSchedStrategy.h.

getType()

AMDGPU::InstructionFlavor llvm::HardwareUnitInfo::getType ( ) const

inline

Definition at line 91 of file AMDGPUCoExecSchedStrategy.h.

Referenced by llvm::CandidateHeuristics::tryCriticalResource(), and llvm::CandidateHeuristics::tryCriticalResourceDependency().

insert()

void HardwareUnitInfo::insert	(	SUnit *	SU,
		unsigned	BlockingCycles )

Insert the SU into AllSUs and account its BlockingCycles into the TotalCycles.

This maintains the list of PrioritySUs.

Definition at line 113 of file AMDGPUCoExecSchedStrategy.cpp.

References llvm::SUnit::getDepth(), and llvm_unreachable.

markScheduled()

void HardwareUnitInfo::markScheduled	(	SUnit *	SU,
		unsigned	BlockingCycles )

Update the state for SU being scheduled by removing it from the AllSUs and reducing its BlockingCycles from the TotalCycles.

This maintains the list of PrioritySUs.

Definition at line 138 of file AMDGPUCoExecSchedStrategy.cpp.

References llvm::SUnit::getDepth().

Referenced by llvm::CandidateHeuristics::updateForScheduling().

producesCoexecWindow()

bool llvm::HardwareUnitInfo::producesCoexecWindow ( ) const

inline

Definition at line 93 of file AMDGPUCoExecSchedStrategy.h.

reset()

void llvm::HardwareUnitInfo::reset ( )

inline

Definition at line 114 of file AMDGPUCoExecSchedStrategy.h.

References llvm::AMDGPU::Other.

setProducesCoexecWindow()

void llvm::HardwareUnitInfo::setProducesCoexecWindow ( bool Val )

inline

Definition at line 95 of file AMDGPUCoExecSchedStrategy.h.

setType()

void llvm::HardwareUnitInfo::setType ( unsigned TheType )

inline

Definition at line 86 of file AMDGPUCoExecSchedStrategy.h.

References assert(), and llvm::AMDGPU::NUM_FLAVORS.

size()

unsigned llvm::HardwareUnitInfo::size ( )

inline

Definition at line 82 of file AMDGPUCoExecSchedStrategy.h.

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The documentation for this class was generated from the following files:

• lib/Target/AMDGPU/AMDGPUCoExecSchedStrategy.h
• lib/Target/AMDGPU/AMDGPUCoExecSchedStrategy.cpp