The MemTest class tests a cache coherent memory system by generating false sharing and verifying the read data against a reference updated on the completion of writes. More...

#include <memtest.hh>

Inheritance diagram for MemTest:

Classes
class	CpuPort

Public Types
typedef MemTestParams	Params

Public Types inherited from MemObject
typedef MemObjectParams	Params

Public Types inherited from ClockedObject
typedef ClockedObjectParams	Params
	Parameters of ClockedObject. More...

Public Types inherited from SimObject
typedef SimObjectParams	Params

Public Member Functions
	MemTest (const Params *p)

virtual void	regStats ()
	Register statistics for this object. More...

virtual BaseMasterPort &	getMasterPort (const std::string &if_name, PortID idx=InvalidPortID)
	Get a master port with a given name and index. More...

Public Member Functions inherited from MemObject
const Params *	params () const

	MemObject (const Params *params)

virtual BaseSlavePort &	getSlavePort (const std::string &if_name, PortID idx=InvalidPortID)
	Get a slave port with a given name and index. 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

Protected Member Functions
void	tick ()

void	noRequest ()

void	noResponse ()

Addr	blockAlign (Addr addr) const
	Get the block aligned address. More...

void	completeRequest (PacketPtr pkt, bool functional=false)
	Complete a request by checking the response. More...

bool	sendPkt (PacketPtr pkt)

void	recvRetry ()

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
EventWrapper< MemTest,&MemTest::tick >	tickEvent

EventWrapper< MemTest,&MemTest::noRequest >	noRequestEvent

EventWrapper< MemTest,&MemTest::noResponse >	noResponseEvent

CpuPort	port

PacketPtr	retryPkt

const unsigned	size

const Cycles	interval

const unsigned	percentReads

const unsigned	percentFunctional

const unsigned	percentUncacheable

MasterID	masterId
	Request id for all generated traffic. More...

unsigned int	id

std::set< Addr >	outstandingAddrs

std::unordered_map< Addr, uint8_t >	referenceData

const unsigned	blockSize

const Addr	blockAddrMask

Addr	baseAddr1

Addr	baseAddr2

Addr	uncacheAddr

const unsigned	progressInterval

const Cycles	progressCheck

Tick	nextProgressMessage

uint64_t	numReads

uint64_t	numWrites

const uint64_t	maxLoads

const bool	atomic

const bool	suppressFuncWarnings

Stats::Scalar	numReadsStat

Stats::Scalar	numWritesStat

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...

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

Detailed Description

The MemTest class tests a cache coherent memory system by generating false sharing and verifying the read data against a reference updated on the completion of writes.

Each tester reads and writes a specific byte in a cache line, as determined by its unique id. Thus, all requests issued by the MemTest instance are a single byte and a specific address is only ever touched by a single tester.

In addition to verifying the data, the tester also has timeouts for both requests and responses, thus checking that the memory-system is making progress.

Definition at line 70 of file memtest.hh.

Member Typedef Documentation

typedef MemTestParams MemTest::Params

Definition at line 75 of file memtest.hh.

Constructor & Destructor Documentation

MemTest::MemTest ( const Params * p )

Definition at line 87 of file memtest.cc.

References baseAddr1, baseAddr2, blockSize, Clocked::clockEdge(), curTick(), fatal_if(), noRequestEvent, noResponseEvent, numReads, numWrites, progressCheck, EventManager::schedule(), TESTER_ALLOCATOR, tickEvent, and uncacheAddr.

Member Function Documentation

Addr MemTest::blockAlign ( Addr addr ) const

inlineprotected

Get the block aligned address.

Parameters

addr	Address to align

Returns: The block aligned address

Definition at line 152 of file memtest.hh.

References blockAddrMask.

Referenced by completeRequest(), and tick().

void MemTest::completeRequest	(	PacketPtr	pkt,
		bool	functional = `false`
	)

protected

Complete a request by checking the response.

Parameters

pkt	Response packet
functional	Whether the access was functional or not

Definition at line 137 of file memtest.cc.

References blockAlign(), ccprintf(), Clocked::clockEdge(), curTick(), DPRINTF, exitSimLoop(), Packet::getConstPtr(), Request::getPaddr(), Request::getSize(), Packet::isError(), Packet::isRead(), Packet::isWrite(), maxLoads, SimObject::name(), nextProgressMessage, noResponseEvent, numReads, numReadsStat, numWrites, numWritesStat, outstandingAddrs, panic, progressCheck, progressInterval, referenceData, Packet::req, EventManager::reschedule(), suppressFuncWarnings, and warn.

Referenced by tick().

BaseMasterPort & MemTest::getMasterPort	(	const std::string &	if_name,
		PortID	idx = `InvalidPortID`
	)

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.

Parameters

if_name	Port name
idx	Index in the case of a VectorPort

Returns: A reference to the given port

Reimplemented from MemObject.

Definition at line 128 of file memtest.cc.

References MemObject::getMasterPort(), and port.

void MemTest::noRequest ( )

protected

Definition at line 312 of file memtest.cc.

References SimObject::name(), panic, and progressCheck.

void MemTest::noResponse ( )

protected

Definition at line 318 of file memtest.cc.

References SimObject::name(), panic, and progressCheck.

void MemTest::recvRetry ( )

protected

Definition at line 324 of file memtest.cc.

References Clocked::clockEdge(), DPRINTF, interval, port, retryPkt, EventManager::schedule(), MasterPort::sendTimingReq(), and tickEvent.

void MemTest::regStats ( )

virtual

Register statistics for this object.

Reimplemented from SimObject.

Definition at line 200 of file memtest.cc.

References Stats::DataWrap< Derived, InfoProxyType >::desc(), SimObject::name(), Stats::DataWrap< Derived, InfoProxyType >::name(), numReadsStat, numWritesStat, and ClockedObject::regStats().

bool MemTest::sendPkt ( PacketPtr pkt )

protected

Definition at line 74 of file memtest.cc.

Referenced by tick().

void MemTest::tick ( )

protected

Member Data Documentation

const bool MemTest::atomic

protected

Definition at line 169 of file memtest.hh.

Addr MemTest::baseAddr1

protected

Definition at line 157 of file memtest.hh.

Referenced by MemTest(), and tick().

Addr MemTest::baseAddr2

protected

Definition at line 158 of file memtest.hh.

Referenced by MemTest(), and tick().

const Addr MemTest::blockAddrMask

protected

Definition at line 144 of file memtest.hh.

Referenced by blockAlign().

const unsigned MemTest::blockSize

protected

Definition at line 142 of file memtest.hh.

Referenced by MemTest().

unsigned int MemTest::id

protected

Definition at line 135 of file memtest.hh.

Referenced by tick().

const Cycles MemTest::interval

protected

Definition at line 126 of file memtest.hh.

Referenced by recvRetry(), and tick().

MasterID MemTest::masterId

protected

Request id for all generated traffic.

Definition at line 133 of file memtest.hh.

Referenced by tick().

const uint64_t MemTest::maxLoads

protected

Definition at line 167 of file memtest.hh.

Referenced by completeRequest().

Tick MemTest::nextProgressMessage

protected

Definition at line 163 of file memtest.hh.

Referenced by completeRequest().

EventWrapper<MemTest, &MemTest::noRequest> MemTest::noRequestEvent

protected

Definition at line 91 of file memtest.hh.

Referenced by MemTest(), and tick().

EventWrapper<MemTest, &MemTest::noResponse> MemTest::noResponseEvent

protected

Definition at line 95 of file memtest.hh.

Referenced by completeRequest(), and MemTest().

uint64_t MemTest::numReads

protected

Definition at line 165 of file memtest.hh.

Referenced by completeRequest(), and MemTest().

Stats::Scalar MemTest::numReadsStat

protected

Definition at line 173 of file memtest.hh.

Referenced by completeRequest(), and regStats().

uint64_t MemTest::numWrites

protected

Definition at line 166 of file memtest.hh.

Referenced by completeRequest(), and MemTest().

Stats::Scalar MemTest::numWritesStat

protected

Definition at line 174 of file memtest.hh.

Referenced by completeRequest(), and regStats().

std::set<Addr> MemTest::outstandingAddrs

protected

Definition at line 137 of file memtest.hh.

Referenced by completeRequest(), and tick().

const unsigned MemTest::percentFunctional

protected

Definition at line 129 of file memtest.hh.

Referenced by tick().

const unsigned MemTest::percentReads

protected

Definition at line 128 of file memtest.hh.

Referenced by tick().

const unsigned MemTest::percentUncacheable

protected

Definition at line 130 of file memtest.hh.

Referenced by tick().

CpuPort MemTest::port

protected

Definition at line 120 of file memtest.hh.

Referenced by getMasterPort(), recvRetry(), and tick().

const Cycles MemTest::progressCheck

protected

Definition at line 162 of file memtest.hh.

Referenced by completeRequest(), MemTest(), noRequest(), noResponse(), and tick().

const unsigned MemTest::progressInterval

protected

Definition at line 161 of file memtest.hh.

Referenced by completeRequest().

std::unordered_map<Addr, uint8_t> MemTest::referenceData

protected

Definition at line 140 of file memtest.hh.

Referenced by completeRequest(), and tick().

PacketPtr MemTest::retryPkt

protected

Definition at line 122 of file memtest.hh.

Referenced by recvRetry(), and tick().

const unsigned MemTest::size

protected

Definition at line 124 of file memtest.hh.

Referenced by tick().

const bool MemTest::suppressFuncWarnings

protected

Definition at line 171 of file memtest.hh.

Referenced by completeRequest().

EventWrapper<MemTest, &MemTest::tick> MemTest::tickEvent

protected

Definition at line 87 of file memtest.hh.

Referenced by MemTest(), recvRetry(), and tick().

Addr MemTest::uncacheAddr

protected

Definition at line 159 of file memtest.hh.

Referenced by MemTest(), and tick().

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

cpu/testers/memtest/memtest.hh
cpu/testers/memtest/memtest.cc

Classes

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation