Pattern entry data type, a set of stride and counter entries. More...

#include <signature_path.hh>

Inheritance diagram for gem5::prefetch::SignaturePath::PatternEntry:

Public Member Functions
	PatternEntry (size_t num_strides, unsigned counter_bits, TagExtractor ext)

void	invalidate () override
	Reset the entries to their initial values.

PatternStrideEntry *	findStride (stride_t stride)
	Returns the entry with the desired stride.

PatternStrideEntry &	getStrideEntry (stride_t stride)
	Gets the entry with the provided stride, if there is no entry with the associated stride, it replaces one of them.

Public Member Functions inherited from gem5::TaggedEntry
	TaggedEntry ()

	~TaggedEntry ()=default

void	registerTagExtractor (TagExtractor ext)

virtual bool	isValid () const
	Checks if the entry is valid.

bool	isSecure () const
	Check if this block holds data from the secure memory space.

virtual Addr	getTag () const
	Get tag associated to this block.

bool	match (const KeyType &key) const
	Checks if the given tag information corresponds to this entry's.

virtual void	insert (const KeyType &key)
	Insert the block by assigning it a tag and marking it valid.

std::string	print () const override
	Prints relevant information about this entry.

Public Member Functions inherited from gem5::ReplaceableEntry
	ReplaceableEntry ()

virtual	~ReplaceableEntry ()=default

virtual void	setPosition (const uint32_t set, const uint32_t way)
	Set both the set and way.

uint32_t	getSet () const
	Get set number.

uint32_t	getWay () const
	Get way number.

Public Attributes
std::vector< PatternStrideEntry >	strideEntries
	group of stides

SatCounter8	counter
	use counter, used by SPPv2

Public Attributes inherited from gem5::ReplaceableEntry
std::shared_ptr< replacement_policy::ReplacementData >	replacementData
	Replacement data associated to this entry.

Additional Inherited Members
Public Types inherited from gem5::TaggedEntry
using	KeyType = TaggedTypes::KeyType

using	IndexingPolicy = TaggedIndexingPolicy

using	TagExtractor = std::function<Addr(Addr)>

Protected Member Functions inherited from gem5::TaggedEntry
virtual void	setTag (Addr tag)
	Set tag associated to this block.

virtual void	setSecure ()
	Set secure bit.

void	clearSecure ()
	Clear secure bit.

virtual void	setValid ()
	Set valid bit.

Protected Attributes inherited from gem5::TaggedEntry
TagExtractor	extractTag
	Callback used to extract the tag from the entry.

Protected Attributes inherited from gem5::ReplaceableEntry
uint32_t	_set
	Set to which this entry belongs.

uint32_t	_way
	Way (relative position within the set) to which this entry belongs.

Detailed Description

Pattern entry data type, a set of stride and counter entries.

Definition at line 103 of file signature_path.hh.

Constructor & Destructor Documentation

◆ PatternEntry()

gem5::prefetch::SignaturePath::PatternEntry::PatternEntry	(	size_t	num_strides,
		unsigned	counter_bits,
		TagExtractor	ext )

inline

Definition at line 109 of file signature_path.hh.

References counter, gem5::ArmISA::ext, gem5::TaggedEntry::registerTagExtractor(), strideEntries, and gem5::TaggedEntry::TaggedEntry().

Member Function Documentation

◆ findStride()

PatternStrideEntry * gem5::prefetch::SignaturePath::PatternEntry::findStride ( stride_t stride )

inline

Returns the entry with the desired stride.

Parameters

stride the stride to find

Returns: a pointer to the entry, if the stride was found, or nullptr, if the stride was not found

Definition at line 135 of file signature_path.hh.

References gem5::ArmISA::stride, and strideEntries.

Referenced by getStrideEntry().

◆ getStrideEntry()

SignaturePath::PatternStrideEntry & gem5::prefetch::SignaturePath::PatternEntry::getStrideEntry ( stride_t stride )

Gets the entry with the provided stride, if there is no entry with the associated stride, it replaces one of them.

Parameters

stride the stride to find

Returns: reference to the selected entry

Definition at line 75 of file signature_path.cc.

References gem5::prefetch::SignaturePath::PatternStrideEntry::counter, findStride(), gem5::GenericSatCounter< T >::reset(), gem5::ArmISA::stride, gem5::prefetch::SignaturePath::PatternStrideEntry::stride, and strideEntries.

Referenced by gem5::prefetch::SignaturePath::updatePatternTable().

◆ invalidate()

void gem5::prefetch::SignaturePath::PatternEntry::invalidate ( )

inlineoverridevirtual

Reset the entries to their initial values.

Reimplemented from gem5::TaggedEntry.

Definition at line 119 of file signature_path.hh.

References counter, gem5::TaggedEntry::invalidate(), and strideEntries.

Member Data Documentation

◆ counter

SatCounter8 gem5::prefetch::SignaturePath::PatternEntry::counter

use counter, used by SPPv2

Definition at line 108 of file signature_path.hh.

Referenced by gem5::prefetch::SignaturePathV2::calculateLookaheadConfidence(), gem5::prefetch::SignaturePathV2::calculatePrefetchConfidence(), gem5::prefetch::SignaturePathV2::increasePatternEntryCounter(), invalidate(), and PatternEntry().

◆ strideEntries

std::vector<PatternStrideEntry> gem5::prefetch::SignaturePath::PatternEntry::strideEntries

group of stides

Definition at line 106 of file signature_path.hh.

Referenced by gem5::prefetch::SignaturePath::calculatePrefetch(), findStride(), getStrideEntry(), gem5::prefetch::SignaturePathV2::increasePatternEntryCounter(), invalidate(), and PatternEntry().

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

mem/cache/prefetch/signature_path.hh
mem/cache/prefetch/signature_path.cc

Public Member Functions

Public Attributes

Additional Inherited Members