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gem5
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gem5
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#include <lru.hh>
Public Types | |
| typedef LRUParams | Params |
| Convenience typedef. More... | |
 Public Types inherited from BaseSetAssoc | |
| typedef CacheBlk | BlkType |
| Typedef the block type used in this tag store. More... | |
| typedef CacheSet< CacheBlk > | SetType |
| Typedef the set type used in this tag store. More... | |
| typedef BaseSetAssocParams | Params |
| Convenience typedef. More... | |
| Public Types inherited from BaseTags | |
| typedef BaseTagsParams | Params |
| Public Types inherited from ClockedObject | |
| typedef ClockedObjectParams | Params |
| Parameters of ClockedObject. More... | |
| Public Types inherited from SimObject | |
| typedef SimObjectParams | Params |
Public Member Functions | |
| LRU (const Params *p) | |
| Construct and initialize this tag store. More... | |
| ~LRU () | |
| Destructor. More... | |
| CacheBlk * | accessBlock (Addr addr, bool is_secure, Cycles &lat) |
| Access block and update replacement data. More... | |
| CacheBlk * | findVictim (Addr addr) |
| Find an invalid block to evict for the address provided. More... | |
| void | insertBlock (PacketPtr pkt, BlkType *blk) |
| Insert the new block into the cache. More... | |
| void | invalidate (CacheBlk *blk) |
| Invalidate the given block. More... | |
| Public Member Functions inherited from BaseSetAssoc | |
| BaseSetAssoc (const Params *p) | |
| Construct and initialize this tag store. More... | |
| virtual | ~BaseSetAssoc () |
| Destructor. More... | |
| CacheBlk * | findBlockBySetAndWay (int set, int way) const override |
| Find the cache block given set and way. More... | |
| CacheBlk * | findBlock (Addr addr, bool is_secure) const override |
| Finds the given address in the cache, do not update replacement data. More... | |
| virtual void | setWayAllocationMax (int ways) override |
| Limit the allocation for the cache ways. More... | |
| virtual int | getWayAllocationMax () const override |
| Get the way allocation mask limit. More... | |
| Addr | extractTag (Addr addr) const override |
| Generate the tag from the given address. More... | |
| int | extractSet (Addr addr) const override |
| Calculate the set index from the address. More... | |
| Addr | regenerateBlkAddr (Addr tag, unsigned set) const override |
| Regenerate the block address from the tag. More... | |
| void | cleanupRefs () override |
| Called at end of simulation to complete average block reference stats. More... | |
| std::string | print () const override |
| Print all tags used. More... | |
| void | computeStats () override |
| Called prior to dumping stats to compute task occupancy. More... | |
| void | forEachBlk (CacheBlkVisitor &visitor) override |
| Visit each block in the tag store and apply a visitor to the block. More... | |
| Public Member Functions inherited from BaseTags | |
| BaseTags (const Params *p) | |
| virtual | ~BaseTags () |
| Destructor. More... | |
| void | setCache (BaseCache *_cache) |
| Set the parent cache back pointer. More... | |
| void | regStats () |
| Register local statistics. More... | |
| Addr | blkAlign (Addr addr) const |
| Align an address to the block size. More... | |
| int | extractBlkOffset (Addr addr) const |
| Calculate the block offset of an address. More... | |
| Public Member Functions inherited from ClockedObject | |
| ClockedObject (const ClockedObjectParams *p) | |
| const Params * | params () 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 Params * | params () 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... | |
| ProbeManager * | getProbeManager () |
| 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) | |
| EventQueue * | eventQueue () 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 |
Additional Inherited Members | |
| Static Public Member Functions inherited from SimObject | |
| static void | serializeAll (CheckpointOut &cp) |
| Serialize all SimObjects in the system. More... | |
| static SimObject * | find (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 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 | |
| Clocked & | operator= (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 inherited from BaseSetAssoc | |
| const unsigned | assoc |
| The associativity of the cache. More... | |
| unsigned | allocAssoc |
| The allocatable associativity of the cache (alloc mask). More... | |
| const unsigned | numSets |
| The number of sets in the cache. More... | |
| const bool | sequentialAccess |
| Whether tags and data are accessed sequentially. More... | |
| SetType * | sets |
| The cache sets. More... | |
| BlkType * | blks |
| The cache blocks. More... | |
| uint8_t * | dataBlks |
| The data blocks, 1 per cache block. More... | |
| int | setShift |
| The amount to shift the address to get the set. More... | |
| int | tagShift |
| The amount to shift the address to get the tag. More... | |
| unsigned | setMask |
| Mask out all bits that aren't part of the set index. More... | |
| Protected Attributes inherited from BaseTags | |
| const unsigned | blkSize |
| The block size of the cache. More... | |
| const Addr | blkMask |
| Mask out all bits that aren't part of the block offset. More... | |
| const unsigned | size |
| The size of the cache. More... | |
| const Cycles | lookupLatency |
| The tag lookup latency of the cache. More... | |
| const Cycles | accessLatency |
| The total access latency of the cache. More... | |
| BaseCache * | cache |
| Pointer to the parent cache. More... | |
| int | warmupBound |
| The number of tags that need to be touched to meet the warmup percentage. More... | |
| bool | warmedUp |
| Marked true when the cache is warmed up. More... | |
| unsigned | numBlocks |
| the number of blocks in the cache More... | |
| Stats::Vector | replacements |
| Number of replacements of valid blocks per thread. More... | |
| Stats::Average | tagsInUse |
| Per cycle average of the number of tags that hold valid data. More... | |
| Stats::Scalar | totalRefs |
| The total number of references to a block before it is replaced. More... | |
| Stats::Scalar | sampledRefs |
| The number of reference counts sampled. More... | |
| Stats::Formula | avgRefs |
| Average number of references to a block before is was replaced. More... | |
| Stats::Scalar | warmupCycle |
| The cycle that the warmup percentage was hit. More... | |
| Stats::AverageVector | occupancies |
| Average occupancy of each requestor using the cache. More... | |
| Stats::Formula | avgOccs |
| Average occ % of each requestor using the cache. More... | |
| Stats::Vector | occupanciesTaskId |
| Occupancy of each context/cpu using the cache. More... | |
| Stats::Vector2d | ageTaskId |
| Occupancy of each context/cpu using the cache. More... | |
| Stats::Formula | percentOccsTaskId |
| Occ % of each context/cpu using the cache. More... | |
| Stats::Scalar | tagAccesses |
| Number of tags consulted over all accesses. More... | |
| Stats::Scalar | dataAccesses |
| Number of data blocks consulted over all accesses. More... | |
| 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 | |
| EventQueue * | eventq |
| A pointer to this object's event queue. More... | |
| typedef LRUParams LRU::Params |
| LRU::LRU | ( | const Params * | p | ) |
Access block and update replacement data.
May not succeed, in which case nullptr is returned. This has all the implications of a cache access and should only be used as such. Returns the access latency as a side effect.
| addr | The address to find. |
| is_secure | True if the target memory space is secure. |
| lat | The access latency. |
Reimplemented from BaseSetAssoc.
Definition at line 59 of file lru.cc.
References BaseSetAssoc::accessBlock(), DPRINTF, CacheSet< Blktype >::moveToHead(), BaseSetAssoc::regenerateBlkAddr(), CacheBlk::set, BaseSetAssoc::sets, and CacheBlk::tag.
Find an invalid block to evict for the address provided.
If there are no invalid blocks, this will return the block in the least-recently-used position.
| addr | The addr to a find a replacement candidate for. |
Reimplemented from BaseSetAssoc.
Definition at line 75 of file lru.cc.
References BaseSetAssoc::allocAssoc, BaseSetAssoc::assoc, ArmISA::b, CacheSet< Blktype >::blks, DPRINTF, BaseSetAssoc::extractSet(), ArmISA::i, CacheBlk::isValid(), BaseSetAssoc::regenerateBlkAddr(), BaseSetAssoc::sets, CacheBlk::tag, and CacheBlk::way.
Insert the new block into the cache.
| pkt | Packet holding the address to update |
| blk | The block to update. |
Reimplemented from BaseSetAssoc.
Definition at line 98 of file lru.cc.
References BaseSetAssoc::extractSet(), Packet::getAddr(), BaseSetAssoc::insertBlock(), CacheSet< Blktype >::moveToHead(), and BaseSetAssoc::sets.
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virtual |
Invalidate the given block.
| blk | The block to invalidate. |
Reimplemented from BaseSetAssoc.
Definition at line 107 of file lru.cc.
References BaseSetAssoc::invalidate(), CacheSet< Blktype >::moveToTail(), CacheBlk::set, and BaseSetAssoc::sets.