gem5  v21.1.0.2
Classes | Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
gem5::branch_prediction::StatisticalCorrector Class Referenceabstract

#include <statistical_corrector.hh>

Inheritance diagram for gem5::branch_prediction::StatisticalCorrector:
gem5::SimObject gem5::EventManager gem5::Serializable gem5::Drainable gem5::statistics::Group gem5::Named gem5::branch_prediction::MPP_StatisticalCorrector gem5::branch_prediction::TAGE_SC_L_64KB_StatisticalCorrector gem5::branch_prediction::TAGE_SC_L_8KB_StatisticalCorrector gem5::branch_prediction::MPP_StatisticalCorrector_64KB gem5::branch_prediction::MPP_StatisticalCorrector_8KB

Classes

struct  BranchInfo
 
struct  SCThreadHistory
 
struct  StatisticalCorrectorStats
 

Public Member Functions

 StatisticalCorrector (const StatisticalCorrectorParams &p)
 
virtual BranchInfomakeBranchInfo ()
 
virtual SCThreadHistorymakeThreadHistory ()
 
virtual void initBias ()
 
virtual bool scPredict (ThreadID tid, Addr branch_pc, bool cond_branch, BranchInfo *bi, bool prev_pred_taken, bool bias_bit, bool use_conf_ctr, int8_t conf_ctr, unsigned conf_bits, int hitBank, int altBank, int64_t phist, int init_lsum=0)
 
virtual unsigned getIndBias (Addr branch_pc, BranchInfo *bi, bool b) const
 
virtual unsigned getIndBiasSK (Addr branch_pc, BranchInfo *bi) const
 
virtual unsigned getIndBiasBank (Addr branch_pc, BranchInfo *bi, int hitBank, int altBank) const =0
 
virtual unsigned getIndUpd (Addr branch_pc) const
 
unsigned getIndUpds (Addr branch_pc) const
 
virtual int gPredictions (ThreadID tid, Addr branch_pc, BranchInfo *bi, int &lsum, int64_t phist)=0
 
int64_t gIndex (Addr branch_pc, int64_t bhist, int logs, int nbr, int i)
 
virtual int gIndexLogsSubstr (int nbr, int i)=0
 
int gPredict (Addr branch_pc, int64_t hist, std::vector< int > &length, std::vector< int8_t > *tab, int nbr, int logs, std::vector< int8_t > &w)
 
virtual void gUpdate (Addr branch_pc, bool taken, int64_t hist, std::vector< int > &length, std::vector< int8_t > *tab, int nbr, int logs, std::vector< int8_t > &w, BranchInfo *bi)
 
void initGEHLTable (unsigned numLenghts, std::vector< int > lengths, std::vector< int8_t > *&table, unsigned logNumEntries, std::vector< int8_t > &w, int8_t wInitValue)
 
virtual void scHistoryUpdate (Addr branch_pc, const StaticInstPtr &inst, bool taken, BranchInfo *tage_bi, Addr corrTarget)
 
virtual void gUpdates (ThreadID tid, Addr pc, bool taken, BranchInfo *bi, int64_t phist)=0
 
void init () override
 init() is called after all C++ SimObjects have been created and all ports are connected. More...
 
void updateStats (bool taken, BranchInfo *bi)
 
virtual void condBranchUpdate (ThreadID tid, Addr branch_pc, bool taken, BranchInfo *bi, Addr corrTarget, bool bias_bit, int hitBank, int altBank, int64_t phist)
 
virtual size_t getSizeInBits () const
 
- Public Member Functions inherited from gem5::SimObject
const Paramsparams () const
 
 SimObject (const Params &p)
 
virtual ~SimObject ()
 
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...
 
virtual void regProbeListeners ()
 Register probe listeners 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
 

Protected Member Functions

template<typename T >
void ctrUpdate (T &ctr, bool taken, int nbits)
 
- 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 Attributes

SCThreadHistoryscHistory
 
const unsigned logBias
 
const unsigned logSizeUp
 
const unsigned logSizeUps
 
const unsigned numEntriesFirstLocalHistories
 
const unsigned bwnb
 
const unsigned logBwnb
 
std::vector< int > bwm
 
std::vector< int8_t > * bwgehl
 
std::vector< int8_t > wbw
 
const unsigned lnb
 
const unsigned logLnb
 
std::vector< int > lm
 
std::vector< int8_t > * lgehl
 
std::vector< int8_t > wl
 
const unsigned inb
 
const unsigned logInb
 
std::vector< int > im
 
std::vector< int8_t > * igehl
 
std::vector< int8_t > wi
 
std::vector< int8_t > bias
 
std::vector< int8_t > biasSK
 
std::vector< int8_t > biasBank
 
std::vector< int8_t > wb
 
int updateThreshold
 
std::vector< int > pUpdateThreshold
 
const unsigned chooserConfWidth
 
const unsigned updateThresholdWidth
 
const unsigned pUpdateThresholdWidth
 
const unsigned extraWeightsWidth
 
const unsigned scCountersWidth
 
int8_t firstH
 
int8_t secondH
 
gem5::branch_prediction::StatisticalCorrector::StatisticalCorrectorStats stats
 
- 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::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...
 

Detailed Description

Definition at line 58 of file statistical_corrector.hh.

Constructor & Destructor Documentation

◆ StatisticalCorrector()

gem5::branch_prediction::StatisticalCorrector::StatisticalCorrector ( const StatisticalCorrectorParams &  p)

Member Function Documentation

◆ condBranchUpdate()

void gem5::branch_prediction::StatisticalCorrector::condBranchUpdate ( ThreadID  tid,
Addr  branch_pc,
bool  taken,
BranchInfo bi,
Addr  corrTarget,
bool  bias_bit,
int  hitBank,
int  altBank,
int64_t  phist 
)
virtual

◆ ctrUpdate()

template<typename T >
void gem5::branch_prediction::StatisticalCorrector::ctrUpdate ( T &  ctr,
bool  taken,
int  nbits 
)
inlineprotected

◆ getIndBias()

unsigned gem5::branch_prediction::StatisticalCorrector::getIndBias ( Addr  branch_pc,
BranchInfo bi,
bool  b 
) const
virtual

Reimplemented in gem5::branch_prediction::MPP_StatisticalCorrector.

Definition at line 156 of file statistical_corrector.cc.

References gem5::PowerISA::bi, bias, and logBias.

Referenced by condBranchUpdate(), and scPredict().

◆ getIndBiasBank()

virtual unsigned gem5::branch_prediction::StatisticalCorrector::getIndBiasBank ( Addr  branch_pc,
BranchInfo bi,
int  hitBank,
int  altBank 
) const
pure virtual

◆ getIndBiasSK()

unsigned gem5::branch_prediction::StatisticalCorrector::getIndBiasSK ( Addr  branch_pc,
BranchInfo bi 
) const
virtual

Reimplemented in gem5::branch_prediction::MPP_StatisticalCorrector.

Definition at line 164 of file statistical_corrector.cc.

References gem5::PowerISA::bi, and logBias.

Referenced by condBranchUpdate(), and scPredict().

◆ getIndUpd()

unsigned gem5::branch_prediction::StatisticalCorrector::getIndUpd ( Addr  branch_pc) const
virtual

◆ getIndUpds()

unsigned gem5::branch_prediction::StatisticalCorrector::getIndUpds ( Addr  branch_pc) const

◆ getSizeInBits()

size_t gem5::branch_prediction::StatisticalCorrector::getSizeInBits ( ) const
virtual

◆ gIndex()

int64_t gem5::branch_prediction::StatisticalCorrector::gIndex ( Addr  branch_pc,
int64_t  bhist,
int  logs,
int  nbr,
int  i 
)

◆ gIndexLogsSubstr()

virtual int gem5::branch_prediction::StatisticalCorrector::gIndexLogsSubstr ( int  nbr,
int  i 
)
pure virtual

◆ gPredict()

int gem5::branch_prediction::StatisticalCorrector::gPredict ( Addr  branch_pc,
int64_t  hist,
std::vector< int > &  length,
std::vector< int8_t > *  tab,
int  nbr,
int  logs,
std::vector< int8_t > &  w 
)

◆ gPredictions()

virtual int gem5::branch_prediction::StatisticalCorrector::gPredictions ( ThreadID  tid,
Addr  branch_pc,
BranchInfo bi,
int &  lsum,
int64_t  phist 
)
pure virtual

◆ gUpdate()

void gem5::branch_prediction::StatisticalCorrector::gUpdate ( Addr  branch_pc,
bool  taken,
int64_t  hist,
std::vector< int > &  length,
std::vector< int8_t > *  tab,
int  nbr,
int  logs,
std::vector< int8_t > &  w,
BranchInfo bi 
)
virtual

◆ gUpdates()

virtual void gem5::branch_prediction::StatisticalCorrector::gUpdates ( ThreadID  tid,
Addr  pc,
bool  taken,
BranchInfo bi,
int64_t  phist 
)
pure virtual

◆ init()

void gem5::branch_prediction::StatisticalCorrector::init ( )
overridevirtual

init() is called after all C++ SimObjects have been created and all ports are connected.

Initializations that are independent of unserialization but rely on a fully instantiated and connected SimObject graph should be done here.

Reimplemented from gem5::SimObject.

Definition at line 393 of file statistical_corrector.cc.

References initBias(), makeThreadHistory(), and scHistory.

◆ initBias()

void gem5::branch_prediction::StatisticalCorrector::initBias ( )
virtual

Reimplemented in gem5::branch_prediction::MPP_StatisticalCorrector.

Definition at line 105 of file statistical_corrector.cc.

References bias, biasBank, biasSK, gem5::ArmISA::j, and logBias.

Referenced by init().

◆ initGEHLTable()

void gem5::branch_prediction::StatisticalCorrector::initGEHLTable ( unsigned  numLenghts,
std::vector< int >  lengths,
std::vector< int8_t > *&  table,
unsigned  logNumEntries,
std::vector< int8_t > &  w,
int8_t  wInitValue 
)

◆ makeBranchInfo()

StatisticalCorrector::BranchInfo * gem5::branch_prediction::StatisticalCorrector::makeBranchInfo ( )
virtual

Definition at line 93 of file statistical_corrector.cc.

◆ makeThreadHistory()

StatisticalCorrector::SCThreadHistory * gem5::branch_prediction::StatisticalCorrector::makeThreadHistory ( )
virtual

◆ scHistoryUpdate()

void gem5::branch_prediction::StatisticalCorrector::scHistoryUpdate ( Addr  branch_pc,
const StaticInstPtr inst,
bool  taken,
BranchInfo tage_bi,
Addr  corrTarget 
)
virtual

◆ scPredict()

bool gem5::branch_prediction::StatisticalCorrector::scPredict ( ThreadID  tid,
Addr  branch_pc,
bool  cond_branch,
BranchInfo bi,
bool  prev_pred_taken,
bool  bias_bit,
bool  use_conf_ctr,
int8_t  conf_ctr,
unsigned  conf_bits,
int  hitBank,
int  altBank,
int64_t  phist,
int  init_lsum = 0 
)
virtual

◆ updateStats()

void gem5::branch_prediction::StatisticalCorrector::updateStats ( bool  taken,
BranchInfo bi 
)

Member Data Documentation

◆ bias

std::vector<int8_t> gem5::branch_prediction::StatisticalCorrector::bias
protected

◆ biasBank

std::vector<int8_t> gem5::branch_prediction::StatisticalCorrector::biasBank
protected

◆ biasSK

std::vector<int8_t> gem5::branch_prediction::StatisticalCorrector::biasSK
protected

◆ bwgehl

std::vector<int8_t>* gem5::branch_prediction::StatisticalCorrector::bwgehl
protected

◆ bwm

std::vector<int> gem5::branch_prediction::StatisticalCorrector::bwm
protected

◆ bwnb

const unsigned gem5::branch_prediction::StatisticalCorrector::bwnb
protected

◆ chooserConfWidth

const unsigned gem5::branch_prediction::StatisticalCorrector::chooserConfWidth
protected

◆ extraWeightsWidth

const unsigned gem5::branch_prediction::StatisticalCorrector::extraWeightsWidth
protected

Definition at line 185 of file statistical_corrector.hh.

Referenced by condBranchUpdate(), and gUpdate().

◆ firstH

int8_t gem5::branch_prediction::StatisticalCorrector::firstH
protected

◆ igehl

std::vector<int8_t>* gem5::branch_prediction::StatisticalCorrector::igehl
protected

◆ im

std::vector<int> gem5::branch_prediction::StatisticalCorrector::im
protected

◆ inb

const unsigned gem5::branch_prediction::StatisticalCorrector::inb
protected

◆ lgehl

std::vector<int8_t>* gem5::branch_prediction::StatisticalCorrector::lgehl
protected

◆ lm

std::vector<int> gem5::branch_prediction::StatisticalCorrector::lm
protected

◆ lnb

const unsigned gem5::branch_prediction::StatisticalCorrector::lnb
protected

◆ logBias

const unsigned gem5::branch_prediction::StatisticalCorrector::logBias
protected

◆ logBwnb

const unsigned gem5::branch_prediction::StatisticalCorrector::logBwnb
protected

◆ logInb

const unsigned gem5::branch_prediction::StatisticalCorrector::logInb
protected

◆ logLnb

const unsigned gem5::branch_prediction::StatisticalCorrector::logLnb
protected

◆ logSizeUp

const unsigned gem5::branch_prediction::StatisticalCorrector::logSizeUp
protected

◆ logSizeUps

const unsigned gem5::branch_prediction::StatisticalCorrector::logSizeUps
protected

Definition at line 144 of file statistical_corrector.hh.

Referenced by getIndUpds(), initGEHLTable(), and StatisticalCorrector().

◆ numEntriesFirstLocalHistories

const unsigned gem5::branch_prediction::StatisticalCorrector::numEntriesFirstLocalHistories
protected

◆ pUpdateThreshold

std::vector<int> gem5::branch_prediction::StatisticalCorrector::pUpdateThreshold
protected

◆ pUpdateThresholdWidth

const unsigned gem5::branch_prediction::StatisticalCorrector::pUpdateThresholdWidth
protected

◆ scCountersWidth

const unsigned gem5::branch_prediction::StatisticalCorrector::scCountersWidth
protected

◆ scHistory

SCThreadHistory* gem5::branch_prediction::StatisticalCorrector::scHistory
protected

◆ secondH

int8_t gem5::branch_prediction::StatisticalCorrector::secondH
protected

◆ stats

gem5::branch_prediction::StatisticalCorrector::StatisticalCorrectorStats gem5::branch_prediction::StatisticalCorrector::stats
protected

Referenced by updateStats().

◆ updateThreshold

int gem5::branch_prediction::StatisticalCorrector::updateThreshold
protected

◆ updateThresholdWidth

const unsigned gem5::branch_prediction::StatisticalCorrector::updateThresholdWidth
protected

Definition at line 182 of file statistical_corrector.hh.

Referenced by condBranchUpdate().

◆ wb

std::vector<int8_t> gem5::branch_prediction::StatisticalCorrector::wb
protected

◆ wbw

std::vector<int8_t> gem5::branch_prediction::StatisticalCorrector::wbw
protected

◆ wi

std::vector<int8_t> gem5::branch_prediction::StatisticalCorrector::wi
protected

◆ wl

std::vector<int8_t> gem5::branch_prediction::StatisticalCorrector::wl
protected

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

Generated on Tue Sep 21 2021 12:28:49 for gem5 by doxygen 1.8.17