gem5  v22.0.0.1
Classes | Public Member Functions | Protected Types | Protected Member Functions | Protected Attributes | List of all members
gem5::prefetch::SignaturePath Class Reference

#include <signature_path.hh>

Inheritance diagram for gem5::prefetch::SignaturePath:
gem5::prefetch::Queued gem5::prefetch::Base gem5::ClockedObject gem5::SimObject gem5::Clocked gem5::EventManager gem5::Serializable gem5::Drainable gem5::statistics::Group gem5::Named gem5::prefetch::SignaturePathV2

Classes

struct  PatternEntry
 Pattern entry data type, a set of stride and counter entries. More...
 
struct  PatternStrideEntry
 A stride entry with its counter. More...
 
struct  SignatureEntry
 Signature entry data type. More...
 

Public Member Functions

 SignaturePath (const SignaturePathPrefetcherParams &p)
 
 ~SignaturePath ()=default
 
void calculatePrefetch (const PrefetchInfo &pfi, std::vector< AddrPriority > &addresses) override
 
- Public Member Functions inherited from gem5::prefetch::Queued
 Queued (const QueuedPrefetcherParams &p)
 
virtual ~Queued ()
 
void notify (const PacketPtr &pkt, const PrefetchInfo &pfi) override
 Notify prefetcher of cache access (may be any access or just misses, depending on cache parameters.) More...
 
void insert (const PacketPtr &pkt, PrefetchInfo &new_pfi, int32_t priority)
 
PacketPtr getPacket () override
 
Tick nextPrefetchReadyTime () const override
 
void printQueue (const std::list< DeferredPacket > &queue) const
 
- Public Member Functions inherited from gem5::prefetch::Base
 Base (const BasePrefetcherParams &p)
 
virtual ~Base ()=default
 
virtual void setCache (BaseCache *_cache)
 
virtual void notifyFill (const PacketPtr &pkt)
 Notify prefetcher of cache fill. More...
 
void prefetchUnused ()
 
void incrDemandMhsrMisses ()
 
void pfHitInCache ()
 
void pfHitInMSHR ()
 
void pfHitInWB ()
 
void regProbeListeners () override
 Register probe points for this object. More...
 
void probeNotify (const PacketPtr &pkt, bool miss)
 Process a notification event from the ProbeListener. More...
 
void addEventProbe (SimObject *obj, const char *name)
 Add a SimObject and a probe name to listen events from. More...
 
void addTLB (BaseTLB *tlb)
 Add a BaseTLB object to be used whenever a translation is needed. More...
 
- Public Member Functions inherited from gem5::ClockedObject
 ClockedObject (const ClockedObjectParams &p)
 
void serialize (CheckpointOut &cp) const override
 Serialize an object. More...
 
void unserialize (CheckpointIn &cp) override
 Unserialize an object. More...
 
- Public Member Functions inherited from gem5::SimObject
const Paramsparams () const
 
 SimObject (const Params &p)
 
virtual ~SimObject ()
 
virtual void init ()
 init() is called after all C++ SimObjects have been created and all ports are connected. More...
 
virtual void loadState (CheckpointIn &cp)
 loadState() is called on each SimObject when restoring from a checkpoint. More...
 
virtual void initState ()
 initState() is called on each SimObject when not restoring from a checkpoint. More...
 
virtual void regProbePoints ()
 Register probe points for this object. More...
 
ProbeManagergetProbeManager ()
 Get the probe manager for this object. More...
 
virtual PortgetPort (const std::string &if_name, PortID idx=InvalidPortID)
 Get a port with a given name and index. More...
 
virtual void startup ()
 startup() is the final initialization call before simulation. More...
 
DrainState drain () override
 Provide a default implementation of the drain interface for objects that don't need draining. More...
 
virtual void memWriteback ()
 Write back dirty buffers to memory using functional writes. More...
 
virtual void memInvalidate ()
 Invalidate the contents of memory buffers. More...
 
void serialize (CheckpointOut &cp) const override
 Serialize an object. More...
 
void unserialize (CheckpointIn &cp) override
 Unserialize an object. More...
 
- Public Member Functions inherited from gem5::EventManager
EventQueueeventQueue () const
 
void schedule (Event &event, Tick when)
 
void deschedule (Event &event)
 
void reschedule (Event &event, Tick when, bool always=false)
 
void schedule (Event *event, Tick when)
 
void deschedule (Event *event)
 
void reschedule (Event *event, Tick when, bool always=false)
 
void wakeupEventQueue (Tick when=(Tick) -1)
 This function is not needed by the usual gem5 event loop but may be necessary in derived EventQueues which host gem5 on other schedulers. More...
 
void setCurTick (Tick newVal)
 
 EventManager (EventManager &em)
 Event manger manages events in the event queue. More...
 
 EventManager (EventManager *em)
 
 EventManager (EventQueue *eq)
 
- Public Member Functions inherited from gem5::Serializable
 Serializable ()
 
virtual ~Serializable ()
 
void serializeSection (CheckpointOut &cp, const char *name) const
 Serialize an object into a new section. More...
 
void serializeSection (CheckpointOut &cp, const std::string &name) const
 
void unserializeSection (CheckpointIn &cp, const char *name)
 Unserialize an a child object. More...
 
void unserializeSection (CheckpointIn &cp, const std::string &name)
 
- Public Member Functions inherited from gem5::Drainable
DrainState drainState () const
 Return the current drain state of an object. More...
 
virtual void notifyFork ()
 Notify a child process of a fork. More...
 
- Public Member Functions inherited from gem5::statistics::Group
 Group (Group *parent, const char *name=nullptr)
 Construct a new statistics group. More...
 
virtual ~Group ()
 
virtual void regStats ()
 Callback to set stat parameters. More...
 
virtual void resetStats ()
 Callback to reset stats. More...
 
virtual void preDumpStats ()
 Callback before stats are dumped. More...
 
void addStat (statistics::Info *info)
 Register a stat with this group. More...
 
const std::map< std::string, Group * > & getStatGroups () const
 Get all child groups associated with this object. More...
 
const std::vector< Info * > & getStats () const
 Get all stats associated with this object. More...
 
void addStatGroup (const char *name, Group *block)
 Add a stat block as a child of this block. More...
 
const InforesolveStat (std::string name) const
 Resolve a stat by its name within this group. More...
 
void mergeStatGroup (Group *block)
 Merge the contents (stats & children) of a block to this block. More...
 
 Group ()=delete
 
 Group (const Group &)=delete
 
Groupoperator= (const Group &)=delete
 
- Public Member Functions inherited from gem5::Named
 Named (const std::string &name_)
 
virtual ~Named ()=default
 
virtual std::string name () const
 
- Public Member Functions inherited from gem5::Clocked
void updateClockPeriod ()
 Update the tick to the current tick. More...
 
Tick clockEdge (Cycles cycles=Cycles(0)) const
 Determine the tick when a cycle begins, by default the current one, but the argument also enables the caller to determine a future cycle. More...
 
Cycles curCycle () const
 Determine the current cycle, corresponding to a tick aligned to a clock edge. More...
 
Tick nextCycle () const
 Based on the clock of the object, determine the start tick of the first cycle that is at least one cycle in the future. More...
 
uint64_t frequency () const
 
Tick clockPeriod () const
 
double voltage () const
 
Cycles ticksToCycles (Tick t) const
 
Tick cyclesToTicks (Cycles c) const
 

Protected Types

typedef uint16_t signature_t
 Signature type. More...
 
typedef int16_t stride_t
 Stride type. More...
 
- Protected Types inherited from gem5::prefetch::Queued
using const_iterator = std::list< DeferredPacket >::const_iterator
 
using iterator = std::list< DeferredPacket >::iterator
 

Protected Member Functions

signature_t updateSignature (signature_t sig, stride_t str) const
 Generates a new signature from an existing one and a new stride. More...
 
void addPrefetch (Addr ppn, stride_t last_block, stride_t delta, double path_confidence, signature_t signature, bool is_secure, std::vector< AddrPriority > &addresses)
 Generates an address to be prefetched. More...
 
SignatureEntrygetSignatureEntry (Addr ppn, bool is_secure, stride_t block, bool &miss, stride_t &stride, double &initial_confidence)
 Obtains the SignatureEntry of the given page, if the page is not found, it allocates a new one, replacing an existing entry if needed It also provides the stride of the current block and the initial path confidence of the corresponding entry. More...
 
PatternEntrygetPatternEntry (Addr signature)
 Obtains the PatternEntry of the given signature, if the signature is not found, it allocates a new one, replacing an existing entry if needed. More...
 
void updatePatternTable (Addr signature, stride_t stride)
 Updates the pattern table with the provided signature and stride. More...
 
virtual double calculateLookaheadConfidence (PatternEntry const &sig, PatternStrideEntry const &lookahead) const
 Computes the lookahead path confidence of the provided pattern entry. More...
 
virtual double calculatePrefetchConfidence (PatternEntry const &sig, PatternStrideEntry const &entry) const
 Computes the prefetch confidence of the provided pattern entry. More...
 
virtual void increasePatternEntryCounter (PatternEntry &pattern_entry, PatternStrideEntry &pstride_entry)
 Increases the counter of a given PatternEntry/PatternStrideEntry. More...
 
virtual void handleSignatureTableMiss (stride_t current_block, signature_t &new_signature, double &new_conf, stride_t &new_stride)
 Whenever a new SignatureEntry is allocated, it computes the new signature to be used with the new entry, the resulting stride and the initial path confidence of the new entry. More...
 
virtual void auxiliaryPrefetcher (Addr ppn, stride_t current_block, bool is_secure, std::vector< AddrPriority > &addresses)
 Auxiliar prefetch mechanism used at the end of calculatePrefetch. More...
 
virtual void handlePageCrossingLookahead (signature_t signature, stride_t last_offset, stride_t delta, double path_confidence)
 Handles the situation when the lookahead process has crossed the boundaries of the current page. More...
 
- Protected Member Functions inherited from gem5::prefetch::Base
bool observeAccess (const PacketPtr &pkt, bool miss) const
 Determine if this access should be observed. More...
 
bool inCache (Addr addr, bool is_secure) const
 Determine if address is in cache. More...
 
bool inMissQueue (Addr addr, bool is_secure) const
 Determine if address is in cache miss queue. More...
 
bool hasBeenPrefetched (Addr addr, bool is_secure) const
 
bool samePage (Addr a, Addr b) const
 Determine if addresses are on the same page. More...
 
Addr blockAddress (Addr a) const
 Determine the address of the block in which a lays. More...
 
Addr blockIndex (Addr a) const
 Determine the address of a at block granularity. More...
 
Addr pageAddress (Addr a) const
 Determine the address of the page in which a lays. More...
 
Addr pageOffset (Addr a) const
 Determine the page-offset of a
More...
 
Addr pageIthBlockAddress (Addr page, uint32_t i) const
 Build the address of the i-th block inside the page. More...
 
- Protected Member Functions inherited from gem5::Drainable
 Drainable ()
 
virtual ~Drainable ()
 
virtual void drainResume ()
 Resume execution after a successful drain. More...
 
void signalDrainDone () const
 Signal that an object is drained. More...
 
- Protected Member Functions inherited from gem5::Clocked
 Clocked (ClockDomain &clk_domain)
 Create a clocked object and set the clock domain based on the parameters. More...
 
 Clocked (Clocked &)=delete
 
Clockedoperator= (Clocked &)=delete
 
virtual ~Clocked ()
 Virtual destructor due to inheritance. More...
 
void resetClock () const
 Reset the object's clock using the current global tick value. More...
 
virtual void clockPeriodUpdated ()
 A hook subclasses can implement so they can do any extra work that's needed when the clock rate is changed. More...
 

Protected Attributes

const unsigned stridesPerPatternEntry
 Number of strides stored in each pattern entry. More...
 
const uint8_t signatureShift
 Number of bits to shift when generating a new signature. More...
 
const signature_t signatureBits
 Size of the signature, in bits. More...
 
const double prefetchConfidenceThreshold
 Minimum confidence to issue a prefetch. More...
 
const double lookaheadConfidenceThreshold
 Minimum confidence to keep navigating lookahead entries. More...
 
AssociativeSet< SignatureEntrysignatureTable
 Signature table. More...
 
AssociativeSet< PatternEntrypatternTable
 Pattern table. More...
 
- Protected Attributes inherited from gem5::prefetch::Queued
std::list< DeferredPacketpfq
 
std::list< DeferredPacketpfqMissingTranslation
 
const unsigned queueSize
 Maximum size of the prefetch queue. More...
 
const unsigned missingTranslationQueueSize
 Maximum size of the queue holding prefetch requests with missing address translations. More...
 
const Cycles latency
 Cycles after generation when a prefetch can first be issued. More...
 
const bool queueSquash
 Squash queued prefetch if demand access observed. More...
 
const bool queueFilter
 Filter prefetches if already queued. More...
 
const bool cacheSnoop
 Snoop the cache before generating prefetch (cheating basically) More...
 
const bool tagPrefetch
 Tag prefetch with PC of generating access? More...
 
const unsigned int throttleControlPct
 Percentage of requests that can be throttled. More...
 
gem5::prefetch::Queued::QueuedStats statsQueued
 
- Protected Attributes inherited from gem5::prefetch::Base
BaseCachecache
 Pointr to the parent cache. More...
 
unsigned blkSize
 The block size of the parent cache. More...
 
unsigned lBlkSize
 log_2(block size of the parent cache). More...
 
const bool onMiss
 Only consult prefetcher on cache misses? More...
 
const bool onRead
 Consult prefetcher on reads? More...
 
const bool onWrite
 Consult prefetcher on reads? More...
 
const bool onData
 Consult prefetcher on data accesses? More...
 
const bool onInst
 Consult prefetcher on instruction accesses? More...
 
const RequestorID requestorId
 Request id for prefetches. More...
 
const Addr pageBytes
 
const bool prefetchOnAccess
 Prefetch on every access, not just misses. More...
 
const bool prefetchOnPfHit
 Prefetch on hit on prefetched lines. More...
 
const bool useVirtualAddresses
 Use Virtual Addresses for prefetching. More...
 
gem5::prefetch::Base::StatGroup prefetchStats
 
uint64_t issuedPrefetches
 Total prefetches issued. More...
 
uint64_t usefulPrefetches
 Total prefetches that has been useful. More...
 
BaseTLBtlb
 Registered tlb for address translations. More...
 
- Protected Attributes inherited from gem5::SimObject
const SimObjectParams & _params
 Cached copy of the object parameters. More...
 
- Protected Attributes inherited from gem5::EventManager
EventQueueeventq
 A pointer to this object's event queue. More...
 

Additional Inherited Members

- Public Types inherited from gem5::prefetch::Queued
using AddrPriority = std::pair< Addr, int32_t >
 
- Public Types inherited from gem5::ClockedObject
using Params = ClockedObjectParams
 Parameters of ClockedObject. More...
 
- Public Types inherited from gem5::SimObject
typedef SimObjectParams Params
 
- Static Public Member Functions inherited from gem5::SimObject
static void serializeAll (const std::string &cpt_dir)
 Create a checkpoint by serializing all SimObjects in the system. More...
 
static SimObjectfind (const char *name)
 Find the SimObject with the given name and return a pointer to it. More...
 
static void setSimObjectResolver (SimObjectResolver *resolver)
 There is a single object name resolver, and it is only set when simulation is restoring from checkpoints. More...
 
static SimObjectResolvergetSimObjectResolver ()
 There is a single object name resolver, and it is only set when simulation is restoring from checkpoints. More...
 
- Static Public Member Functions inherited from gem5::Serializable
static const std::string & currentSection ()
 Gets the fully-qualified name of the active section. More...
 
static void generateCheckpointOut (const std::string &cpt_dir, std::ofstream &outstream)
 Generate a checkpoint file so that the serialization can be routed to it. More...
 
- Public Attributes inherited from gem5::ClockedObject
PowerStatepowerState
 

Detailed Description

Definition at line 57 of file signature_path.hh.

Member Typedef Documentation

◆ signature_t

typedef uint16_t gem5::prefetch::SignaturePath::signature_t
protected

Signature type.

Definition at line 61 of file signature_path.hh.

◆ stride_t

typedef int16_t gem5::prefetch::SignaturePath::stride_t
protected

Stride type.

Definition at line 63 of file signature_path.hh.

Constructor & Destructor Documentation

◆ SignaturePath()

gem5::prefetch::SignaturePath::SignaturePath ( const SignaturePathPrefetcherParams &  p)

◆ ~SignaturePath()

gem5::prefetch::SignaturePath::~SignaturePath ( )
default

Member Function Documentation

◆ addPrefetch()

void gem5::prefetch::SignaturePath::addPrefetch ( Addr  ppn,
stride_t  last_block,
stride_t  delta,
double  path_confidence,
signature_t  signature,
bool  is_secure,
std::vector< AddrPriority > &  addresses 
)
protected

Generates an address to be prefetched.

Parameters
ppnpage number to prefetch from
last_blocklast accessed block within the page ppn
deltadifference, in number of blocks, from the last_block accessed to the block to prefetch. The block to prefetch is computed by this formula: ppn * pageBytes + (last_block + delta) * blkSize This value can be negative.
path_confidencethe confidence factor of this prefetch
signaturethe current path signature
is_securewhether this page is inside the secure memory area
addressesaddresses to prefetch will be added to this vector

Definition at line 98 of file signature_path.cc.

References gem5::prefetch::Base::blkSize, DPRINTF, handlePageCrossingLookahead(), gem5::MaxAddr, gem5::prefetch::Base::pageBytes, and gem5::VegaISA::ppn.

Referenced by auxiliaryPrefetcher(), and calculatePrefetch().

◆ auxiliaryPrefetcher()

void gem5::prefetch::SignaturePath::auxiliaryPrefetcher ( Addr  ppn,
stride_t  current_block,
bool  is_secure,
std::vector< AddrPriority > &  addresses 
)
protectedvirtual

Auxiliar prefetch mechanism used at the end of calculatePrefetch.

This prefetcher uses this to activate the next line prefetcher if no prefetch candidates have been found.

Parameters
ppnphysical page number of the current accessed page
current_blocklast accessed block within the page ppn
is_securewhether this page is inside the secure memory area
addressesthe addresses to be prefetched are added to this vector
updated_filter_entriesset of addresses containing these that their filter has been updated, if this call updates a new entry

Reimplemented in gem5::prefetch::SignaturePathV2.

Definition at line 314 of file signature_path.cc.

References addPrefetch(), and gem5::VegaISA::ppn.

Referenced by calculatePrefetch().

◆ calculateLookaheadConfidence()

double gem5::prefetch::SignaturePath::calculateLookaheadConfidence ( PatternEntry const &  sig,
PatternStrideEntry const &  lookahead 
) const
protectedvirtual

Computes the lookahead path confidence of the provided pattern entry.

Parameters
sigthe PatternEntry to use
lookaheadPatternStrideEntry within the provided PatternEntry
Returns
the computed confidence factor

maximum confidence is 0.95, guaranteeing that current confidence will eventually fall beyond the threshold

Reimplemented in gem5::prefetch::SignaturePathV2.

Definition at line 214 of file signature_path.cc.

References gem5::GenericSatCounter< T >::calcSaturation(), and gem5::prefetch::SignaturePath::PatternStrideEntry::counter.

Referenced by calculatePrefetch().

◆ calculatePrefetch()

void gem5::prefetch::SignaturePath::calculatePrefetch ( const PrefetchInfo pfi,
std::vector< AddrPriority > &  addresses 
)
overridevirtual

◆ calculatePrefetchConfidence()

double gem5::prefetch::SignaturePath::calculatePrefetchConfidence ( PatternEntry const &  sig,
PatternStrideEntry const &  entry 
) const
protectedvirtual

Computes the prefetch confidence of the provided pattern entry.

Parameters
sigthe PatternEntry to use
entryPatternStrideEntry within the provided PatternEntry
Returns
the computed confidence factor

Reimplemented in gem5::prefetch::SignaturePathV2.

Definition at line 207 of file signature_path.cc.

References gem5::GenericSatCounter< T >::calcSaturation(), and gem5::prefetch::SignaturePath::PatternStrideEntry::counter.

Referenced by calculatePrefetch().

◆ getPatternEntry()

SignaturePath::PatternEntry & gem5::prefetch::SignaturePath::getPatternEntry ( Addr  signature)
protected

Obtains the PatternEntry of the given signature, if the signature is not found, it allocates a new one, replacing an existing entry if needed.

Parameters
signaturethe signature of the desired entry
Returns
a reference to the PatternEntry

Definition at line 190 of file signature_path.cc.

References patternTable.

Referenced by updatePatternTable().

◆ getSignatureEntry()

SignaturePath::SignatureEntry & gem5::prefetch::SignaturePath::getSignatureEntry ( Addr  ppn,
bool  is_secure,
stride_t  block,
bool &  miss,
stride_t stride,
double &  initial_confidence 
)
protected

Obtains the SignatureEntry of the given page, if the page is not found, it allocates a new one, replacing an existing entry if needed It also provides the stride of the current block and the initial path confidence of the corresponding entry.

Parameters
ppnphysical page number of the page
is_securewhether this page is inside the secure memory area
blockaccessed block within the page
missif the entry is not found, this will be set to true
strideset to the computed stride
initial_confidenceset to the initial confidence value
Returns
a reference to the SignatureEntry

Definition at line 165 of file signature_path.cc.

References handleSignatureTableMiss(), gem5::prefetch::SignaturePath::SignatureEntry::lastBlock, gem5::VegaISA::ppn, gem5::prefetch::SignaturePath::SignatureEntry::signature, signatureTable, and gem5::ArmISA::stride.

Referenced by calculatePrefetch().

◆ handlePageCrossingLookahead()

virtual void gem5::prefetch::SignaturePath::handlePageCrossingLookahead ( signature_t  signature,
stride_t  last_offset,
stride_t  delta,
double  path_confidence 
)
inlineprotectedvirtual

Handles the situation when the lookahead process has crossed the boundaries of the current page.

This is not fully described in the paper that was used to implement this code, however, the article describing the upgraded version of this prefetcher provides some details. For this prefetcher, there are no specific actions to be done.

Parameters
signaturethe lookahead signature that crossed the page
deltathe current stride that caused it
last_offsetthe last accessed block within the page
path_confidencethe path confidence at the moment of crossing

Reimplemented in gem5::prefetch::SignaturePathV2.

Definition at line 282 of file signature_path.hh.

Referenced by addPrefetch().

◆ handleSignatureTableMiss()

void gem5::prefetch::SignaturePath::handleSignatureTableMiss ( stride_t  current_block,
signature_t new_signature,
double &  new_conf,
stride_t new_stride 
)
protectedvirtual

Whenever a new SignatureEntry is allocated, it computes the new signature to be used with the new entry, the resulting stride and the initial path confidence of the new entry.

Parameters
current_blockaccessed block within the page of the associated entry
new_signaturenew signature of the allocated entry
new_confthe initial path confidence of this entry
new_stridethe resulting current stride

Reimplemented in gem5::prefetch::SignaturePathV2.

Definition at line 139 of file signature_path.cc.

Referenced by getSignatureEntry().

◆ increasePatternEntryCounter()

void gem5::prefetch::SignaturePath::increasePatternEntryCounter ( PatternEntry pattern_entry,
PatternStrideEntry pstride_entry 
)
protectedvirtual

Increases the counter of a given PatternEntry/PatternStrideEntry.

Parameters
pattern_entrythe corresponding PatternEntry
pstride_entrythe PatternStrideEntry within the PatternEntry

Reimplemented in gem5::prefetch::SignaturePathV2.

Definition at line 148 of file signature_path.cc.

References gem5::prefetch::SignaturePath::PatternStrideEntry::counter.

Referenced by updatePatternTable().

◆ updatePatternTable()

void gem5::prefetch::SignaturePath::updatePatternTable ( Addr  signature,
stride_t  stride 
)
protected

Updates the pattern table with the provided signature and stride.

Parameters
signaturethe signature to use to index the pattern table
stridethe stride to use to index the set of strides of the pattern table entry

Definition at line 155 of file signature_path.cc.

References getPatternEntry(), gem5::prefetch::SignaturePath::PatternEntry::getStrideEntry(), increasePatternEntryCounter(), and gem5::ArmISA::stride.

Referenced by calculatePrefetch().

◆ updateSignature()

signature_t gem5::prefetch::SignaturePath::updateSignature ( signature_t  sig,
stride_t  str 
) const
inlineprotected

Generates a new signature from an existing one and a new stride.

Parameters
sigcurrent signature
strstride to add to the new signature
Returns
the new signature

Definition at line 159 of file signature_path.hh.

References gem5::mask(), signatureBits, and signatureShift.

Referenced by calculatePrefetch().

Member Data Documentation

◆ lookaheadConfidenceThreshold

const double gem5::prefetch::SignaturePath::lookaheadConfidenceThreshold
protected

Minimum confidence to keep navigating lookahead entries.

Definition at line 74 of file signature_path.hh.

Referenced by calculatePrefetch(), and SignaturePath().

◆ patternTable

AssociativeSet<PatternEntry> gem5::prefetch::SignaturePath::patternTable
protected

Pattern table.

Definition at line 151 of file signature_path.hh.

Referenced by calculatePrefetch(), and getPatternEntry().

◆ prefetchConfidenceThreshold

const double gem5::prefetch::SignaturePath::prefetchConfidenceThreshold
protected

Minimum confidence to issue a prefetch.

Definition at line 72 of file signature_path.hh.

Referenced by calculatePrefetch(), and SignaturePath().

◆ signatureBits

const signature_t gem5::prefetch::SignaturePath::signatureBits
protected

Size of the signature, in bits.

Definition at line 70 of file signature_path.hh.

Referenced by updateSignature().

◆ signatureShift

const uint8_t gem5::prefetch::SignaturePath::signatureShift
protected

Number of bits to shift when generating a new signature.

Definition at line 68 of file signature_path.hh.

Referenced by updateSignature().

◆ signatureTable

AssociativeSet<SignatureEntry> gem5::prefetch::SignaturePath::signatureTable
protected

Signature table.

Definition at line 87 of file signature_path.hh.

Referenced by getSignatureEntry().

◆ stridesPerPatternEntry

const unsigned gem5::prefetch::SignaturePath::stridesPerPatternEntry
protected

Number of strides stored in each pattern entry.

Definition at line 66 of file signature_path.hh.


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

Generated on Sat Jun 18 2022 08:14:30 for gem5 by doxygen 1.8.17