gem5
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The TLBCoalescer is a MemObject sitting on the front side (CPUSide) of each TLB. More...
#include <tlb_coalescer.hh>
Classes | |
class | CleanupEvent |
class | CpuSidePort |
class | IssueProbeEvent |
class | MemSidePort |
Public Types | |
typedef TLBCoalescerParams | Params |
typedef std::vector< PacketPtr > | coalescedReq |
typedef std::unordered_map < int64_t, std::vector < coalescedReq > > | CoalescingFIFO |
typedef std::unordered_map < Addr, coalescedReq > | CoalescingTable |
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typedef MemObjectParams | Params |
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typedef ClockedObjectParams | Params |
Parameters of ClockedObject. More... | |
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typedef SimObjectParams | Params |
Public Member Functions | |
TLBCoalescer (const Params *p) | |
~TLBCoalescer () | |
bool | canCoalesce (PacketPtr pkt1, PacketPtr pkt2) |
void | updatePhysAddresses (PacketPtr pkt) |
void | regStats () |
Register statistics for this object. More... | |
Tick | frequency () const |
Tick | ticks (int numCycles) const |
Tick | curCycle () const |
Tick | tickToCycles (Tick val) const |
BaseMasterPort & | getMasterPort (const std::string &if_name, PortID idx) |
Get a master port with a given name and index. More... | |
BaseSlavePort & | getSlavePort (const std::string &if_name, PortID idx) |
Get a slave port with a given name and index. More... | |
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const Params * | params () const |
MemObject (const Params *params) | |
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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... | |
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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... | |
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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) |
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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) |
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DrainState | drainState () const |
Return the current drain state of an object. More... | |
virtual void | notifyFork () |
Notify a child process of a fork. More... | |
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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 Attributes | |
int | clock |
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Enums::PwrState | _currPwrState |
To keep track of the current power state. More... | |
Tick | prvEvalTick |
Stats::Scalar | numPwrStateTransitions |
Stats::Distribution | pwrStateClkGateDist |
Stats::Vector | pwrStateResidencyTicks |
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const SimObjectParams * | _params |
Cached copy of the object parameters. More... | |
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EventQueue * | eventq |
A pointer to this object's event queue. More... | |
Additional Inherited Members | |
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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... | |
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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) |
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static int | ckptCount = 0 |
static int | ckptMaxCount = 0 |
static int | ckptPrevCount = -1 |
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Drainable () | |
virtual | ~Drainable () |
virtual void | drainResume () |
Resume execution after a successful drain. More... | |
void | signalDrainDone () const |
Signal that an object is drained. More... | |
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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... | |
The TLBCoalescer is a MemObject sitting on the front side (CPUSide) of each TLB.
It receives packets and issues coalesced requests to the TLB below it. It controls how requests are coalesced (the rules) and the permitted number of TLB probes per cycle (i.e., how many coalesced requests it feeds the TLB per cycle).
Definition at line 68 of file tlb_coalescer.hh.
Definition at line 91 of file tlb_coalescer.hh.
typedef std::unordered_map<int64_t, std::vector<coalescedReq> > TLBCoalescer::CoalescingFIFO |
Definition at line 110 of file tlb_coalescer.hh.
typedef std::unordered_map<Addr, coalescedReq> TLBCoalescer::CoalescingTable |
Definition at line 123 of file tlb_coalescer.hh.
typedef TLBCoalescerParams TLBCoalescer::Params |
Definition at line 78 of file tlb_coalescer.hh.
TLBCoalescer::TLBCoalescer | ( | const Params * | p | ) |
Definition at line 42 of file tlb_coalescer.cc.
References cpuSidePort, csprintf(), ArmISA::i, memSidePort, and SimObject::name().
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inline |
Definition at line 80 of file tlb_coalescer.hh.
Definition at line 96 of file tlb_coalescer.cc.
References disableCoalescing, Request::getVaddr(), AlphaISA::PageBytes, Packet::req, roundDown(), safe_cast(), and Packet::senderState.
Referenced by TLBCoalescer::CpuSidePort::recvTimingReq().
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inline |
Definition at line 152 of file tlb_coalescer.hh.
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inline |
Definition at line 150 of file tlb_coalescer.hh.
References clock, and SimClock::Frequency.
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virtual |
Get a master port with a given name and index.
This is used at binding time and returns a reference to a protocol-agnostic base master port.
if_name | Port name |
idx | Index in the case of a VectorPort |
Reimplemented from MemObject.
Definition at line 76 of file tlb_coalescer.cc.
References memSidePort, and panic.
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virtual |
Get a slave port with a given name and index.
This is used at binding time and returns a reference to a protocol-agnostic base master port.
if_name | Port name |
idx | Index in the case of a VectorPort |
Reimplemented from MemObject.
Definition at line 62 of file tlb_coalescer.cc.
References cpuSidePort, and panic.
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virtual |
Register statistics for this object.
Reimplemented from SimObject.
Definition at line 547 of file tlb_coalescer.cc.
References coalescedAccesses, Stats::DataWrap< Derived, InfoProxyType >::desc(), localLatency, localqueuingCycles, SimObject::name(), Stats::DataWrap< Derived, InfoProxyType >::name(), queuingCycles, ClockedObject::regStats(), and uncoalescedAccesses.
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inline |
Definition at line 151 of file tlb_coalescer.hh.
References clock.
Referenced by TLBCoalescer::CpuSidePort::recvTimingReq().
Definition at line 153 of file tlb_coalescer.hh.
References clock.
void TLBCoalescer::updatePhysAddresses | ( | PacketPtr | pkt | ) |
Definition at line 141 of file tlb_coalescer.cc.
References cleanupEvent, cleanupQueue, curTick(), DPRINTF, Request::getPaddr(), Request::getVaddr(), ArmISA::i, Packet::isRequest(), issuedTranslationsTable, Packet::makeTimingResponse(), AlphaISA::PageBytes, Packet::req, roundDown(), safe_cast(), EventManager::schedule(), Event::scheduled(), Packet::senderState, SlavePort::sendTimingResp(), Request::setFlags(), Request::setPaddr(), X86ISA::size(), Request::UNCACHEABLE, and X86ISA::uncacheable.
CleanupEvent TLBCoalescer::cleanupEvent |
Definition at line 245 of file tlb_coalescer.hh.
Referenced by updatePhysAddresses().
std::queue<Addr> TLBCoalescer::cleanupQueue |
Definition at line 249 of file tlb_coalescer.hh.
Referenced by updatePhysAddresses().
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protected |
Definition at line 75 of file tlb_coalescer.hh.
Referenced by curCycle(), frequency(), ticks(), and tickToCycles().
Stats::Scalar TLBCoalescer::coalescedAccesses |
Definition at line 130 of file tlb_coalescer.hh.
Referenced by TLBCoalescer::CpuSidePort::recvTimingReq(), and regStats().
CoalescingFIFO TLBCoalescer::coalescerFIFO |
Definition at line 112 of file tlb_coalescer.hh.
Referenced by TLBCoalescer::CpuSidePort::recvTimingReq().
int TLBCoalescer::coalescingWindow |
Definition at line 87 of file tlb_coalescer.hh.
Referenced by TLBCoalescer::CpuSidePort::recvTimingReq().
std::vector<CpuSidePort*> TLBCoalescer::cpuSidePort |
Definition at line 210 of file tlb_coalescer.hh.
Referenced by getSlavePort(), and TLBCoalescer().
bool TLBCoalescer::disableCoalescing |
Definition at line 94 of file tlb_coalescer.hh.
Referenced by canCoalesce().
CoalescingTable TLBCoalescer::issuedTranslationsTable |
Definition at line 125 of file tlb_coalescer.hh.
Referenced by updatePhysAddresses().
Stats::Formula TLBCoalescer::localLatency |
Definition at line 142 of file tlb_coalescer.hh.
Referenced by regStats().
Stats::Scalar TLBCoalescer::localqueuingCycles |
Definition at line 140 of file tlb_coalescer.hh.
Referenced by TLBCoalescer::CpuSidePort::recvTimingReq(), and regStats().
std::vector<MemSidePort*> TLBCoalescer::memSidePort |
Definition at line 212 of file tlb_coalescer.hh.
Referenced by getMasterPort(), and TLBCoalescer().
IssueProbeEvent TLBCoalescer::probeTLBEvent |
Definition at line 229 of file tlb_coalescer.hh.
Referenced by TLBCoalescer::CpuSidePort::recvTimingReq().
Stats::Scalar TLBCoalescer::queuingCycles |
Definition at line 135 of file tlb_coalescer.hh.
Referenced by TLBCoalescer::CpuSidePort::recvTimingReq(), and regStats().
int TLBCoalescer::TLBProbesPerCycle |
Definition at line 83 of file tlb_coalescer.hh.
Stats::Scalar TLBCoalescer::uncoalescedAccesses |
Definition at line 128 of file tlb_coalescer.hh.
Referenced by TLBCoalescer::CpuSidePort::recvTimingReq(), and regStats().