gem5::compression::FrequentValues::VFTEntry Class Reference

Inheritance diagram for gem5::compression::FrequentValues::VFTEntry:

Public Member Functions
	VFTEntry (std::size_t num_bits, TagExtractor ext)
void	invalidate () override
	Invalidate the block.
Public Member Functions inherited from gem5::CacheEntry
	CacheEntry (TagExtractor ext)
	~CacheEntry ()=default
virtual bool	isValid () const
	Checks if the entry is valid.
virtual Addr	getTag () const
	Get tag associated to this block.
virtual bool	match (const Addr addr) const
	Checks if the given tag information corresponds to this entry's.
virtual void	insert (const Addr addr)
	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
uint64_t	value
	The value is stored as a 64 bit entry to accomodate for the uncompressed value.
SatCounter32	counter
	The ideal counter width (in bits) is determined by the maximum number of times a given value appears in the cache (log2(cache_size / chunkSizeBits)).
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::CacheEntry
using	IndexingPolicy = BaseIndexingPolicy
using	KeyType = Addr
using	TagExtractor = std::function<Addr(Addr)>
Protected Member Functions inherited from gem5::CacheEntry
virtual void	setTag (Addr _tag)
	Set tag associated to this block.
virtual void	setValid ()
	Set valid bit.
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

Definition at line 115 of file frequent_values.hh.

Constructor & Destructor Documentation

VFTEntry()

gem5::compression::FrequentValues::VFTEntry::VFTEntry ( std::size_t num_bits, TagExtractor ext )

inline

Definition at line 132 of file frequent_values.hh.

References gem5::CacheEntry::CacheEntry(), counter, gem5::ArmISA::ext, and value.

Member Function Documentation

invalidate()

void gem5::compression::FrequentValues::VFTEntry::invalidate ( )

inlineoverridevirtual

Invalidate the block.

Its contents are no longer valid.

Reimplemented from gem5::CacheEntry.

Definition at line 138 of file frequent_values.hh.

References counter, gem5::CacheEntry::invalidate(), and value.

Member Data Documentation

counter

SatCounter32 gem5::compression::FrequentValues::VFTEntry::counter

The ideal counter width (in bits) is determined by the maximum number of times a given value appears in the cache (log2(cache_size / chunkSizeBits)).

If smaller counters are used their values should be rescaled when saturated.

Definition at line 130 of file frequent_values.hh.

Referenced by invalidate(), gem5::compression::FrequentValues::sampleValues(), and VFTEntry().

value

uint64_t gem5::compression::FrequentValues::VFTEntry::value

The value is stored as a 64 bit entry to accomodate for the uncompressed value.

All real values must be 32 bits.

Definition at line 122 of file frequent_values.hh.

Referenced by invalidate(), gem5::compression::FrequentValues::sampleValues(), and VFTEntry().

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

• mem/cache/compressors/frequent_values.hh