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StridePrefetcher Class Reference

#include <stride.hh>

Inheritance diagram for StridePrefetcher:
QueuedPrefetcher BasePrefetcher ClockedObject SimObject Clocked EventManager Serializable Drainable

Classes

class  PCTable
 
struct  StrideEntry
 

Public Member Functions

 StridePrefetcher (const StridePrefetcherParams *p)
 
void calculatePrefetch (const PacketPtr &pkt, std::vector< AddrPriority > &addresses)
 
- Public Member Functions inherited from QueuedPrefetcher
 QueuedPrefetcher (const QueuedPrefetcherParams *p)
 
virtual ~QueuedPrefetcher ()
 
Tick notify (const PacketPtr &pkt)
 Notify prefetcher of cache access (may be any access or just misses, depending on cache parameters.) More...
 
PacketPtr insert (AddrPriority &info, bool is_secure)
 
PacketPtr getPacket ()
 
Tick nextPrefetchReadyTime () const
 
void regStats ()
 Register statistics for this object. More...
 
- Public Member Functions inherited from BasePrefetcher
 BasePrefetcher (const BasePrefetcherParams *p)
 
virtual ~BasePrefetcher ()
 
void setCache (BaseCache *_cache)
 
- Public Member Functions inherited from ClockedObject
 ClockedObject (const ClockedObjectParams *p)
 
const Paramsparams () const
 
void serialize (CheckpointOut &cp) const override
 Serialize an object. More...
 
void unserialize (CheckpointIn &cp) override
 Unserialize an object. More...
 
Enums::PwrState pwrState () const
 
std::string pwrStateName () const
 
std::vector< double > pwrStateWeights () const
 Returns the percentage residency for each power state. More...
 
void computeStats ()
 Record stats values like state residency by computing the time difference from previous update. More...
 
void pwrState (Enums::PwrState)
 
void regStats () override
 Register statistics for this object. More...
 
- Public Member Functions inherited from SimObject
const Paramsparams () const
 
 SimObject (const Params *_params)
 
virtual ~SimObject ()
 
virtual const std::string name () const
 
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 resetStats ()
 Reset statistics associated with this object. 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 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 EventManager
 EventManager (EventManager &em)
 
 EventManager (EventManager *em)
 
 EventManager (EventQueue *eq)
 
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)
 
void setCurTick (Tick newVal)
 
- Public Member Functions inherited from 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 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 Clocked
void updateClockPeriod () const
 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 Member Functions

bool pcTableHit (Addr pc, bool is_secure, int master_id, StrideEntry *&entry)
 
StrideEntrypcTableVictim (Addr pc, int master_id)
 
Addr pcHash (Addr pc) const
 
- Protected Member Functions inherited from QueuedPrefetcher
std::list< DeferredPacket >
::const_iterator 
inPrefetch (Addr address, bool is_secure) const
 
std::list< DeferredPacket >
::iterator 
inPrefetch (Addr address, bool is_secure)
 
- Protected Member Functions inherited from BasePrefetcher
bool observeAccess (const PacketPtr &pkt) 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 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 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 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...
 

Protected Attributes

const int maxConf
 
const int threshConf
 
const int minConf
 
const int startConf
 
const int pcTableAssoc
 
const int pcTableSets
 
const bool useMasterId
 
const int degree
 
PCTable pcTable
 
- Protected Attributes inherited from QueuedPrefetcher
std::list< DeferredPacketpfq
 
const unsigned queueSize
 Maximum size of the prefetch queue. 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...
 
Stats::Scalar pfIdentified
 
Stats::Scalar pfBufferHit
 
Stats::Scalar pfInCache
 
Stats::Scalar pfRemovedFull
 
Stats::Scalar pfSpanPage
 
- Protected Attributes inherited from BasePrefetcher
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...
 
Systemsystem
 System we belong to. More...
 
bool onMiss
 Only consult prefetcher on cache misses? More...
 
bool onRead
 Consult prefetcher on reads? More...
 
bool onWrite
 Consult prefetcher on reads? More...
 
bool onData
 Consult prefetcher on data accesses? More...
 
bool onInst
 Consult prefetcher on instruction accesses? More...
 
MasterID masterId
 Request id for prefetches. More...
 
const Addr pageBytes
 
Stats::Scalar pfIssued
 
- Protected Attributes inherited from ClockedObject
Enums::PwrState _currPwrState
 To keep track of the current power state. More...
 
Tick prvEvalTick
 
Stats::Scalar numPwrStateTransitions
 
Stats::Distribution pwrStateClkGateDist
 
Stats::Vector pwrStateResidencyTicks
 
- Protected Attributes inherited from SimObject
const SimObjectParams * _params
 Cached copy of the object parameters. More...
 
- Protected Attributes inherited from EventManager
EventQueueeventq
 A pointer to this object's event queue. More...
 

Additional Inherited Members

- Public Types inherited from ClockedObject
typedef ClockedObjectParams Params
 Parameters of ClockedObject. More...
 
- Public Types inherited from SimObject
typedef SimObjectParams Params
 
- Static Public Member Functions inherited from SimObject
static void serializeAll (CheckpointOut &cp)
 Serialize 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 Public Member Functions inherited from Serializable
static const std::string & currentSection ()
 Get the fully-qualified name of the active section. More...
 
static void serializeAll (const std::string &cpt_dir)
 
static void unserializeGlobals (CheckpointIn &cp)
 
- Static Public Attributes inherited from Serializable
static int ckptCount = 0
 
static int ckptMaxCount = 0
 
static int ckptPrevCount = -1
 
- Protected Types inherited from QueuedPrefetcher
using AddrPriority = std::pair< Addr, int32_t >
 
using const_iterator = std::list< DeferredPacket >::const_iterator
 
using iterator = std::list< DeferredPacket >::iterator
 

Detailed Description

Definition at line 56 of file stride.hh.

Constructor & Destructor Documentation

StridePrefetcher::StridePrefetcher ( const StridePrefetcherParams *  p)

Definition at line 55 of file stride.cc.

References isPowerOf2(), BasePrefetcher::onInst, and pcTableSets.

Member Function Documentation

void StridePrefetcher::calculatePrefetch ( const PacketPtr pkt,
std::vector< AddrPriority > &  addresses 
)
virtual
Addr StridePrefetcher::pcHash ( Addr  pc) const
inlineprotected

Definition at line 181 of file stride.cc.

References floorLog2(), and pcTableSets.

Referenced by pcTableHit(), and pcTableVictim().

bool StridePrefetcher::pcTableHit ( Addr  pc,
bool  is_secure,
int  master_id,
StrideEntry *&  entry 
)
inlineprotected

Definition at line 200 of file stride.cc.

References DPRINTF, pcHash(), pcTable, and pcTableAssoc.

Referenced by calculatePrefetch().

StridePrefetcher::StrideEntry * StridePrefetcher::pcTableVictim ( Addr  pc,
int  master_id 
)
inlineprotected

Definition at line 189 of file stride.cc.

References DPRINTF, pcHash(), pcTable, pcTableAssoc, Random::random(), and random_mt.

Referenced by calculatePrefetch().

Member Data Documentation

const int StridePrefetcher::degree
protected

Definition at line 69 of file stride.hh.

Referenced by calculatePrefetch().

const int StridePrefetcher::maxConf
protected

Definition at line 59 of file stride.hh.

Referenced by calculatePrefetch().

const int StridePrefetcher::minConf
protected

Definition at line 61 of file stride.hh.

Referenced by calculatePrefetch().

PCTable StridePrefetcher::pcTable
protected

Definition at line 107 of file stride.hh.

Referenced by pcTableHit(), and pcTableVictim().

const int StridePrefetcher::pcTableAssoc
protected

Definition at line 64 of file stride.hh.

Referenced by pcTableHit(), and pcTableVictim().

const int StridePrefetcher::pcTableSets
protected

Definition at line 65 of file stride.hh.

Referenced by pcHash(), StridePrefetcher(), and StridePrefetcher::PCTable::~PCTable().

const int StridePrefetcher::startConf
protected

Definition at line 62 of file stride.hh.

Referenced by calculatePrefetch().

const int StridePrefetcher::threshConf
protected

Definition at line 60 of file stride.hh.

Referenced by calculatePrefetch().

const bool StridePrefetcher::useMasterId
protected

Definition at line 67 of file stride.hh.

Referenced by calculatePrefetch().


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

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