The traffic generator is a module that generates stimuli for the memory system, based on a collection of simple generator behaviours that are either probabilistic or based on traces. More...

#include <base.hh>

Inheritance diagram for gem5::BaseTrafficGen:

Classes
struct	StatGroup

class	TrafficGenPort
	Request port specialisation for the traffic generator. More...

Public Member Functions
	BaseTrafficGen (const BaseTrafficGenParams &p)

	~BaseTrafficGen ()

Port &	getPort (const std::string &if_name, PortID idx=InvalidPortID) override
	Get a port with a given name and index.

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

DrainState	drain () override
	Draining is the process of clearing out the states of SimObjects.These are the SimObjects that are partially executed or are partially in flight.

void	serialize (CheckpointOut &cp) const override
	Serialize an object.

void	unserialize (CheckpointIn &cp) override
	Unserialize an object.

std::shared_ptr< BaseGen >	createIdle (Tick duration)

std::shared_ptr< BaseGen >	createExit (Tick duration)

std::shared_ptr< BaseGen >	createLinear (Tick duration, Addr start_addr, Addr end_addr, Addr blocksize, Tick min_period, Tick max_period, uint8_t read_percent, Addr data_limit)

std::shared_ptr< BaseGen >	createRandom (Tick duration, Addr start_addr, Addr end_addr, Addr blocksize, Tick min_period, Tick max_period, uint8_t read_percent, Addr data_limit)

std::shared_ptr< BaseGen >	createDram (Tick duration, Addr start_addr, Addr end_addr, Addr blocksize, Tick min_period, Tick max_period, uint8_t read_percent, Addr data_limit, unsigned int num_seq_pkts, unsigned int page_size, unsigned int nbr_of_banks, unsigned int nbr_of_banks_util, enums::AddrMap addr_mapping, unsigned int nbr_of_ranks)

std::shared_ptr< BaseGen >	createDramRot (Tick duration, Addr start_addr, Addr end_addr, Addr blocksize, Tick min_period, Tick max_period, uint8_t read_percent, Addr data_limit, unsigned int num_seq_pkts, unsigned int page_size, unsigned int nbr_of_banks, unsigned int nbr_of_banks_util, enums::AddrMap addr_mapping, unsigned int nbr_of_ranks, unsigned int max_seq_count_per_rank)

std::shared_ptr< BaseGen >	createHybrid (Tick duration, Addr start_addr_dram, Addr end_addr_dram, Addr blocksize_dram, Addr start_addr_nvm, Addr end_addr_nvm, Addr blocksize_nvm, Tick min_period, Tick max_period, uint8_t read_percent, Addr data_limit, unsigned int num_seq_pkts_dram, unsigned int page_size_dram, unsigned int nbr_of_banks_dram, unsigned int nbr_of_banks_util_dram, unsigned int num_seq_pkts_nvm, unsigned int buffer_size_nvm, unsigned int nbr_of_banks_nvm, unsigned int nbr_of_banks_util_nvm, enums::AddrMap addr_mapping, unsigned int nbr_of_ranks_dram, unsigned int nbr_of_ranks_nvm, uint8_t nvm_percent)

std::shared_ptr< BaseGen >	createNvm (Tick duration, Addr start_addr, Addr end_addr, Addr blocksize, Tick min_period, Tick max_period, uint8_t read_percent, Addr data_limit, unsigned int num_seq_pkts, unsigned int buffer_size, unsigned int nbr_of_banks, unsigned int nbr_of_banks_util, enums::AddrMap addr_mapping, unsigned int nbr_of_ranks)

std::shared_ptr< BaseGen >	createStrided (Tick duration, Addr start_addr, Addr end_addr, Addr offset, Addr block_size, Addr superblock_size, Addr stride_size, Tick min_period, Tick max_period, uint8_t read_percent, Addr data_limit)

std::shared_ptr< BaseGen >	createTrace (Tick duration, const std::string &trace_file, Addr addr_offset)

Public Member Functions inherited from gem5::ClockedObject
	ClockedObject (const ClockedObjectParams &p)

void	serialize (CheckpointOut &cp) const override
	Serialize an object.

void	unserialize (CheckpointIn &cp) override
	Unserialize an object.

Public Member Functions inherited from gem5::SimObject
const Params &	params () const

	SimObject (const Params &p)

virtual	~SimObject ()

virtual void	loadState (CheckpointIn &cp)
	loadState() is called on each SimObject when restoring from a checkpoint.

virtual void	initState ()
	initState() is called on each SimObject when not restoring from a checkpoint.

virtual void	regProbePoints ()
	Register probe points for this object.

virtual void	regProbeListeners ()
	Register probe listeners for this object.

ProbeManager *	getProbeManager ()
	Get the probe manager for this object.

virtual void	startup ()
	startup() is the final initialization call before simulation.

DrainState	drain () override
	Provide a default implementation of the drain interface for objects that don't need draining.

virtual void	memWriteback ()
	Write back dirty buffers to memory using functional writes.

virtual void	memInvalidate ()
	Invalidate the contents of memory buffers.

void	serialize (CheckpointOut &cp) const override
	Serialize an object.

void	unserialize (CheckpointIn &cp) override
	Unserialize an object.

Public Member Functions inherited from gem5::EventManager
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)
	This function is not needed by the usual gem5 event loop but may be necessary in derived EventQueues which host gem5 on other schedulers.

void	setCurTick (Tick newVal)

	EventManager (EventManager &em)
	Event manger manages events in the event queue.

	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.

void	serializeSection (CheckpointOut &cp, const std::string &name) const

void	unserializeSection (CheckpointIn &cp, const char *name)
	Unserialize an a child object.

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.

virtual void	notifyFork ()
	Notify a child process of a fork.

Public Member Functions inherited from gem5::statistics::Group
	Group (Group parent, const char name=nullptr)
	Construct a new statistics group.

virtual	~Group ()

virtual void	regStats ()
	Callback to set stat parameters.

virtual void	resetStats ()
	Callback to reset stats.

virtual void	preDumpStats ()
	Callback before stats are dumped.

void	addStat (statistics::Info *info)
	Register a stat with this group.

const std::map< std::string, Group * > &	getStatGroups () const
	Get all child groups associated with this object.

const std::vector< Info * > &	getStats () const
	Get all stats associated with this object.

void	addStatGroup (const char name, Group block)
	Add a stat block as a child of this block.

const Info *	resolveStat (std::string name) const
	Resolve a stat by its name within this group.

void	mergeStatGroup (Group *block)
	Merge the contents (stats & children) of a block to this block.

	Group ()=delete

	Group (const Group &)=delete

Group &	operator= (const Group &)=delete

Public Member Functions inherited from gem5::Named
	Named (const std::string &name_)

virtual	~Named ()=default

virtual std::string	name () const

Public Member Functions inherited from gem5::Clocked
void	updateClockPeriod ()
	Update the tick to the current tick.

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.

Cycles	curCycle () const
	Determine the current cycle, corresponding to a tick aligned to a clock edge.

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.

uint64_t	frequency () const

Tick	clockPeriod () const

double	voltage () const

Cycles	ticksToCycles (Tick t) const

Tick	cyclesToTicks (Cycles c) const

Protected Member Functions
void	start ()

virtual std::shared_ptr< BaseGen >	nextGenerator ()=0

Protected Member Functions inherited from gem5::Drainable
	Drainable ()

virtual	~Drainable ()

virtual void	drainResume ()
	Resume execution after a successful drain.

void	signalDrainDone () const
	Signal that an object is drained.

Protected Member Functions inherited from gem5::Clocked
	Clocked (ClockDomain &clk_domain)
	Create a clocked object and set the clock domain based on the parameters.

	Clocked (Clocked &)=delete

Clocked &	operator= (Clocked &)=delete

virtual	~Clocked ()
	Virtual destructor due to inheritance.

void	resetClock () const
	Reset the object's clock using the current global tick value.

virtual void	clockPeriodUpdated ()
	A hook subclasses can implement so they can do any extra work that's needed when the clock rate is changed.

Protected Attributes
System *const	system
	The system used to determine which mode we are currently operating in.

const bool	elasticReq
	Determine whether to add elasticity in the request injection, thus responding to backpressure by slowing things down.

const Tick	progressCheck
	Time to tolerate waiting for retries (not making progress), until we declare things broken.

std::unordered_map< RequestPtr, Tick >	waitingResp
	Reqs waiting for response.

gem5::BaseTrafficGen::StatGroup	stats

const RequestorID	requestorId
	RequestorID used in generated requests.

std::shared_ptr< BaseGen >	activeGenerator
	Currently active generator.

std::unique_ptr< StreamGen >	streamGenerator
	Stream/SubstreamID Generator.

Protected Attributes inherited from gem5::SimObject
const SimObjectParams &	_params
	Cached copy of the object parameters.

Protected Attributes inherited from gem5::EventManager
EventQueue *	eventq
	A pointer to this object's event queue.

Private Member Functions
void	recvReqRetry ()
	Receive a retry from the neighbouring port and attempt to resend the waiting packet.

void	retryReq ()

bool	recvTimingResp (PacketPtr pkt)

void	transition ()
	Transition to the next generator.

void	scheduleUpdate ()
	Schedule the update event based on nextPacketTick and nextTransitionTick.

void	noProgress ()
	Method to inform the user we have made no progress.

void	update ()
	Schedules event for next update and generates a new packet or requests a new generatoir depending on the current time.

bool	allocateWaitingRespSlot (PacketPtr pkt)
	Puts this packet in the waitingResp list and returns true if we are above the maximum number of oustanding requests.

Private Attributes
EventFunctionWrapper	noProgressEvent
	Event to keep track of our progress, or lack thereof.

Tick	nextTransitionTick
	Time of next transition.

Tick	nextPacketTick
	Time of the next packet.

const int	maxOutstandingReqs

TrafficGenPort	port
	The instance of request port used by the traffic generator.

PacketPtr	retryPkt
	Packet waiting to be sent.

Tick	retryPktTick
	Tick when the stalled packet was meant to be sent.

bool	blockedWaitingResp
	Set when we blocked waiting for outstanding reqs.

EventFunctionWrapper	updateEvent
	Event for scheduling updates.

Friends
class	BaseGen

Additional Inherited Members
Public Types inherited from gem5::ClockedObject
using	Params = ClockedObjectParams
	Parameters of ClockedObject.

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.

static SimObject *	find (const char *name)
	Find the SimObject with the given name and return a pointer to it.

static void	setSimObjectResolver (SimObjectResolver *resolver)
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.

static SimObjectResolver *	getSimObjectResolver ()
	There is a single object name resolver, and it is only set when simulation is restoring from checkpoints.

Static Public Member Functions inherited from gem5::Serializable
static const std::string &	currentSection ()
	Gets the fully-qualified name of the active section.

static void	generateCheckpointOut (const std::string &cpt_dir, std::ofstream &outstream)
	Generate a checkpoint file so that the serialization can be routed to it.

Public Attributes inherited from gem5::ClockedObject
PowerState *	powerState

Detailed Description

The traffic generator is a module that generates stimuli for the memory system, based on a collection of simple generator behaviours that are either probabilistic or based on traces.

It can be used stand alone for creating test cases for interconnect and memory controllers, or function as a black box replacement for system components that are not yet modelled in detail, e.g. a video engine or baseband subsystem.

Definition at line 67 of file base.hh.

Constructor & Destructor Documentation

◆ BaseTrafficGen()

gem5::BaseTrafficGen::BaseTrafficGen ( const BaseTrafficGenParams & p )

Definition at line 70 of file base.cc.

References noProgress().

◆ ~BaseTrafficGen()

gem5::BaseTrafficGen::~BaseTrafficGen ( )

Definition at line 89 of file base.cc.

Member Function Documentation

◆ allocateWaitingRespSlot()

bool gem5::BaseTrafficGen::allocateWaitingRespSlot ( PacketPtr pkt )

inlineprivate

Puts this packet in the waitingResp list and returns true if we are above the maximum number of oustanding requests.

Definition at line 179 of file base.hh.

References gem5::curTick(), maxOutstandingReqs, gem5::Packet::needsResponse(), gem5::Packet::req, and waitingResp.

Referenced by update().

◆ createDram()

std::shared_ptr< BaseGen > gem5::BaseTrafficGen::createDram	(	Tick	duration,
		Addr	start_addr,
		Addr	end_addr,
		Addr	blocksize,
		Tick	min_period,
		Tick	max_period,
		uint8_t	read_percent,
		Addr	data_limit,
		unsigned int	num_seq_pkts,
		unsigned int	page_size,
		unsigned int	nbr_of_banks,
		unsigned int	nbr_of_banks_util,
		enums::AddrMap	addr_mapping,
		unsigned int	nbr_of_ranks )

Definition at line 412 of file base.cc.

References gem5::System::cacheLineSize(), requestorId, and system.

Referenced by gem5::TrafficGen::parseConfig().

◆ createDramRot()

std::shared_ptr< BaseGen > gem5::BaseTrafficGen::createDramRot	(	Tick	duration,
		Addr	start_addr,
		Addr	end_addr,
		Addr	blocksize,
		Tick	min_period,
		Tick	max_period,
		uint8_t	read_percent,
		Addr	data_limit,
		unsigned int	num_seq_pkts,
		unsigned int	page_size,
		unsigned int	nbr_of_banks,
		unsigned int	nbr_of_banks_util,
		enums::AddrMap	addr_mapping,
		unsigned int	nbr_of_ranks,
		unsigned int	max_seq_count_per_rank )

Definition at line 436 of file base.cc.

References gem5::System::cacheLineSize(), requestorId, and system.

Referenced by gem5::TrafficGen::parseConfig().

◆ createExit()

std::shared_ptr< BaseGen > gem5::BaseTrafficGen::createExit ( Tick duration )

Definition at line 377 of file base.cc.

References requestorId.

Referenced by gem5::TrafficGen::parseConfig().

◆ createHybrid()

std::shared_ptr< BaseGen > gem5::BaseTrafficGen::createHybrid	(	Tick	duration,
		Addr	start_addr_dram,
		Addr	end_addr_dram,
		Addr	blocksize_dram,
		Addr	start_addr_nvm,
		Addr	end_addr_nvm,
		Addr	blocksize_nvm,
		Tick	min_period,
		Tick	max_period,
		uint8_t	read_percent,
		Addr	data_limit,
		unsigned int	num_seq_pkts_dram,
		unsigned int	page_size_dram,
		unsigned int	nbr_of_banks_dram,
		unsigned int	nbr_of_banks_util_dram,
		unsigned int	num_seq_pkts_nvm,
		unsigned int	buffer_size_nvm,
		unsigned int	nbr_of_banks_nvm,
		unsigned int	nbr_of_banks_util_nvm,
		enums::AddrMap	addr_mapping,
		unsigned int	nbr_of_ranks_dram,
		unsigned int	nbr_of_ranks_nvm,
		uint8_t	nvm_percent )

Definition at line 463 of file base.cc.

References gem5::System::cacheLineSize(), requestorId, and system.

◆ createIdle()

std::shared_ptr< BaseGen > gem5::BaseTrafficGen::createIdle ( Tick duration )

Definition at line 370 of file base.cc.

References requestorId.

Referenced by gem5::TrafficGen::parseConfig().

◆ createLinear()

std::shared_ptr< BaseGen > gem5::BaseTrafficGen::createLinear	(	Tick	duration,
		Addr	start_addr,
		Addr	end_addr,
		Addr	blocksize,
		Tick	min_period,
		Tick	max_period,
		uint8_t	read_percent,
		Addr	data_limit )

Definition at line 384 of file base.cc.

References gem5::System::cacheLineSize(), requestorId, and system.

Referenced by gem5::TrafficGen::parseConfig().

◆ createNvm()

std::shared_ptr< BaseGen > gem5::BaseTrafficGen::createNvm	(	Tick	duration,
		Addr	start_addr,
		Addr	end_addr,
		Addr	blocksize,
		Tick	min_period,
		Tick	max_period,
		uint8_t	read_percent,
		Addr	data_limit,
		unsigned int	num_seq_pkts,
		unsigned int	buffer_size,
		unsigned int	nbr_of_banks,
		unsigned int	nbr_of_banks_util,
		enums::AddrMap	addr_mapping,
		unsigned int	nbr_of_ranks )

Definition at line 506 of file base.cc.

References gem5::System::cacheLineSize(), requestorId, and system.

Referenced by gem5::TrafficGen::parseConfig().

◆ createRandom()

std::shared_ptr< BaseGen > gem5::BaseTrafficGen::createRandom	(	Tick	duration,
		Addr	start_addr,
		Addr	end_addr,
		Addr	blocksize,
		Tick	min_period,
		Tick	max_period,
		uint8_t	read_percent,
		Addr	data_limit )

Definition at line 398 of file base.cc.

References gem5::System::cacheLineSize(), requestorId, and system.

Referenced by gem5::TrafficGen::parseConfig().

◆ createStrided()

std::shared_ptr< BaseGen > gem5::BaseTrafficGen::createStrided	(	Tick	duration,
		Addr	start_addr,
		Addr	end_addr,
		Addr	offset,
		Addr	block_size,
		Addr	superblock_size,
		Addr	stride_size,
		Tick	min_period,
		Tick	max_period,
		uint8_t	read_percent,
		Addr	data_limit )

Definition at line 530 of file base.cc.

References gem5::System::cacheLineSize(), gem5::ArmISA::offset, requestorId, and system.

Referenced by gem5::TrafficGen::parseConfig().

◆ createTrace()

std::shared_ptr< BaseGen > gem5::BaseTrafficGen::createTrace	(	Tick	duration,
		const std::string &	trace_file,
		Addr	addr_offset )

Definition at line 547 of file base.cc.

References panic, and requestorId.

Referenced by gem5::TrafficGen::parseConfig().

◆ drain()

DrainState gem5::BaseTrafficGen::drain ( )

overridevirtual

Draining is the process of clearing out the states of SimObjects.These are the SimObjects that are partially executed or are partially in flight.

Draining is mostly used before forking and creating a check point.

This function notifies an object that it needs to drain its state.

If the object does not need further simulation to drain internal buffers, it returns DrainState::Drained and automatically switches to the Drained state. If the object needs more simulation, it returns DrainState::Draining and automatically enters the Draining state. Other return values are invalid.

Note: An object that has entered the Drained state can be disturbed by other objects in the system and consequently stop being drained. These perturbations are not visible in the drain state. The simulator therefore repeats the draining process until all objects return DrainState::Drained on the first call to drain().

Returns: DrainState::Drained if the object is drained at this point in time, DrainState::Draining if it needs further simulation.

Implements gem5::Drainable.

Definition at line 113 of file base.cc.

References gem5::EventManager::deschedule(), gem5::Drained, gem5::Draining, gem5::MaxTick, nextPacketTick, nextTransitionTick, retryPkt, gem5::Event::scheduled(), and updateEvent.

◆ getPort()

Port & gem5::BaseTrafficGen::getPort	(	const std::string &	if_name,
		PortID	idx = InvalidPortID )

overridevirtual

Get a port with a given name and index.

This is used at binding time and returns a reference to a protocol-agnostic port.

gem5 has a request and response port interface. All memory objects are connected together via ports. These ports provide a rigid interface between these memory objects. These ports implement three different memory system modes: timing, atomic, and functional. The most important mode is the timing mode and here timing mode is used for conducting cycle-level timing experiments. The other modes are only used in special circumstances and should not be used to conduct cycle-level timing experiments. The other modes are only used in special circumstances. These ports allow SimObjects to communicate with each other.

Parameters

if_name	Port name
idx	Index in the case of a VectorPort

Returns: A reference to the given port

Reimplemented from gem5::SimObject.

Definition at line 94 of file base.cc.

References gem5::SimObject::getPort(), and port.

◆ init()

void gem5::BaseTrafficGen::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.

Reimplemented in gem5::TrafficGen.

Definition at line 104 of file base.cc.

References fatal, gem5::SimObject::init(), gem5::Port::isConnected(), gem5::Named::name(), and port.

Referenced by gem5::TrafficGen::init().

◆ nextGenerator()

virtual std::shared_ptr< BaseGen > gem5::BaseTrafficGen::nextGenerator ( )

protectedpure virtual

Implemented in gem5::PyTrafficGen, and gem5::TrafficGen.

Referenced by transition().

◆ noProgress()

void gem5::BaseTrafficGen::noProgress ( )

private

Method to inform the user we have made no progress.

Definition at line 329 of file base.cc.

References fatal, gem5::Named::name(), and progressCheck.

Referenced by BaseTrafficGen().

◆ recvReqRetry()

void gem5::BaseTrafficGen::recvReqRetry ( )

private

Receive a retry from the neighbouring port and attempt to resend the waiting packet.

Definition at line 289 of file base.cc.

References DPRINTF, gem5::BaseTrafficGen::StatGroup::numRetries, retryReq(), and stats.

Referenced by gem5::BaseTrafficGen::TrafficGenPort::recvReqRetry().

◆ recvTimingResp()

bool gem5::BaseTrafficGen::recvTimingResp ( PacketPtr pkt )

private

Definition at line 559 of file base.cc.

References blockedWaitingResp, gem5::BaseTrafficGen::StatGroup::bytesRead, gem5::BaseTrafficGen::StatGroup::bytesWritten, gem5::curTick(), gem5::Packet::isWrite(), panic_if, gem5::Packet::print(), gem5::Packet::req, retryReq(), stats, gem5::BaseTrafficGen::StatGroup::totalReadLatency, gem5::BaseTrafficGen::StatGroup::totalReads, gem5::BaseTrafficGen::StatGroup::totalWriteLatency, gem5::BaseTrafficGen::StatGroup::totalWrites, and waitingResp.

Referenced by gem5::BaseTrafficGen::TrafficGenPort::recvTimingResp().

◆ retryReq()

void gem5::BaseTrafficGen::retryReq ( )

private

Definition at line 297 of file base.cc.

References activeGenerator, blockedWaitingResp, gem5::curTick(), gem5::Draining, gem5::Drainable::drainState(), elasticReq, gem5::MaxTick, nextPacketTick, nextTransitionTick, port, retryPkt, retryPktTick, gem5::BaseTrafficGen::StatGroup::retryTicks, scheduleUpdate(), gem5::RequestPort::sendTimingReq(), gem5::Drainable::signalDrainDone(), and stats.

Referenced by recvReqRetry(), and recvTimingResp().

◆ scheduleUpdate()

void gem5::BaseTrafficGen::scheduleUpdate ( )

private

Schedule the update event based on nextPacketTick and nextTransitionTick.

Definition at line 258 of file base.cc.

References activeGenerator, gem5::curTick(), DPRINTF, gem5::MaxTick, nextPacketTick, nextTransitionTick, gem5::EventManager::schedule(), transition(), and updateEvent.

Referenced by retryReq(), start(), and update().

◆ serialize()

void gem5::BaseTrafficGen::serialize ( CheckpointOut & cp ) const

overridevirtual

Serialize an object.

Output an object's state into the current checkpoint section.

Parameters

cp	Checkpoint state

Implements gem5::Serializable.

Reimplemented in gem5::TrafficGen.

Definition at line 132 of file base.cc.

References DPRINTF, gem5::Named::name(), nextPacketTick, nextTransitionTick, gem5::Event::scheduled(), SERIALIZE_SCALAR, updateEvent, warn, and gem5::Event::when().

Referenced by gem5::TrafficGen::serialize().

◆ start()

void gem5::BaseTrafficGen::start ( )

protected

Definition at line 282 of file base.cc.

References scheduleUpdate(), and transition().

Referenced by gem5::TrafficGen::initState(), and gem5::PyTrafficGen::start().

◆ transition()

void gem5::BaseTrafficGen::transition ( )

private

Transition to the next generator.

Definition at line 230 of file base.cc.

References activeGenerator, gem5::curTick(), elasticReq, gem5::MaxTick, nextGenerator(), nextPacketTick, nextTransitionTick, gem5::Event::scheduled(), and updateEvent.

Referenced by gem5::TrafficGen::parseConfig(), scheduleUpdate(), start(), and update().

◆ unserialize()

void gem5::BaseTrafficGen::unserialize ( CheckpointIn & cp )

overridevirtual

Unserialize an object.

Read an object's state from the current checkpoint section.

Parameters

cp	Checkpoint state

Implements gem5::Serializable.

Reimplemented in gem5::TrafficGen.

Definition at line 152 of file base.cc.

References gem5::Named::name(), nextPacketTick, nextTransitionTick, gem5::EventManager::schedule(), UNSERIALIZE_SCALAR, updateEvent, and warn.

Referenced by gem5::TrafficGen::unserialize().

◆ update()

void gem5::BaseTrafficGen::update ( )

private

Schedules event for next update and generates a new packet or requests a new generatoir depending on the current time.

Definition at line 169 of file base.cc.

References activeGenerator, allocateWaitingRespSlot(), blockedWaitingResp, gem5::Packet::cmdString(), gem5::curTick(), DPRINTF, elasticReq, gem5::Packet::getAddr(), gem5::System::isMemAddr(), gem5::Named::name(), nextPacketTick, nextTransitionTick, noProgressEvent, gem5::BaseTrafficGen::StatGroup::numPackets, gem5::BaseTrafficGen::StatGroup::numSuppressed, port, progressCheck, gem5::Packet::req, gem5::EventManager::reschedule(), retryPkt, retryPktTick, scheduleUpdate(), gem5::RequestPort::sendTimingReq(), stats, streamGenerator, system, transition(), gem5::statistics::ScalarBase< Derived, Stor >::value(), and warn.

Friends And Related Symbol Documentation

◆ BaseGen

friend class BaseGen

friend

Definition at line 69 of file base.hh.

Member Data Documentation

◆ activeGenerator

std::shared_ptr<BaseGen> gem5::BaseTrafficGen::activeGenerator

protected

Currently active generator.

Definition at line 343 of file base.hh.

Referenced by gem5::TrafficGen::nextGenerator(), retryReq(), scheduleUpdate(), transition(), and update().

◆ blockedWaitingResp

bool gem5::BaseTrafficGen::blockedWaitingResp

private

Set when we blocked waiting for outstanding reqs.

Definition at line 173 of file base.hh.

Referenced by recvTimingResp(), retryReq(), and update().

◆ elasticReq

const bool gem5::BaseTrafficGen::elasticReq

protected

Determine whether to add elasticity in the request injection, thus responding to backpressure by slowing things down.

Definition at line 82 of file base.hh.

Referenced by retryReq(), transition(), and update().

◆ maxOutstandingReqs

const int gem5::BaseTrafficGen::maxOutstandingReqs

private

Definition at line 126 of file base.hh.

Referenced by allocateWaitingRespSlot().

◆ nextPacketTick

Tick gem5::BaseTrafficGen::nextPacketTick

private

Time of the next packet.

Definition at line 124 of file base.hh.

Referenced by drain(), retryReq(), scheduleUpdate(), serialize(), transition(), unserialize(), and update().

◆ nextTransitionTick

Tick gem5::BaseTrafficGen::nextTransitionTick

private

Time of next transition.

Definition at line 121 of file base.hh.

Referenced by drain(), retryReq(), scheduleUpdate(), serialize(), transition(), unserialize(), and update().

◆ noProgressEvent

EventFunctionWrapper gem5::BaseTrafficGen::noProgressEvent

private

Event to keep track of our progress, or lack thereof.

Definition at line 118 of file base.hh.

Referenced by update().

◆ port

TrafficGenPort gem5::BaseTrafficGen::port

private

The instance of request port used by the traffic generator.

Definition at line 164 of file base.hh.

Referenced by getPort(), init(), retryReq(), and update().

◆ progressCheck

const Tick gem5::BaseTrafficGen::progressCheck

protected

Time to tolerate waiting for retries (not making progress), until we declare things broken.

Definition at line 88 of file base.hh.

Referenced by noProgress(), and update().

◆ requestorId

const RequestorID gem5::BaseTrafficGen::requestorId

protected

RequestorID used in generated requests.

Definition at line 340 of file base.hh.

Referenced by createDram(), createDramRot(), createExit(), createHybrid(), createIdle(), createLinear(), createNvm(), createRandom(), createStrided(), and createTrace().

◆ retryPkt

PacketPtr gem5::BaseTrafficGen::retryPkt

private

Packet waiting to be sent.

Definition at line 167 of file base.hh.

Referenced by drain(), retryReq(), and update().

◆ retryPktTick

Tick gem5::BaseTrafficGen::retryPktTick

private

Tick when the stalled packet was meant to be sent.

Definition at line 170 of file base.hh.

Referenced by retryReq(), and update().

◆ stats

gem5::BaseTrafficGen::StatGroup gem5::BaseTrafficGen::stats

protected

Referenced by recvReqRetry(), recvTimingResp(), retryReq(), and update().

◆ streamGenerator

std::unique_ptr<StreamGen> gem5::BaseTrafficGen::streamGenerator

protected

Stream/SubstreamID Generator.

Definition at line 346 of file base.hh.

Referenced by update().

◆ system

System* const gem5::BaseTrafficGen::system

protected

The system used to determine which mode we are currently operating in.

Definition at line 76 of file base.hh.

Referenced by createDram(), createDramRot(), createHybrid(), createLinear(), createNvm(), createRandom(), createStrided(), gem5::TrafficGen::initState(), and update().

◆ updateEvent

EventFunctionWrapper gem5::BaseTrafficGen::updateEvent

private

Event for scheduling updates.

Definition at line 191 of file base.hh.

Referenced by drain(), scheduleUpdate(), serialize(), transition(), and unserialize().

◆ waitingResp

std::unordered_map<RequestPtr,Tick> gem5::BaseTrafficGen::waitingResp

protected

Reqs waiting for response.

Definition at line 195 of file base.hh.

Referenced by allocateWaitingRespSlot(), and recvTimingResp().

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

cpu/testers/traffic_gen/base.hh
cpu/testers/traffic_gen/base.cc

Classes

Public Member Functions

Protected Member Functions

Protected Attributes

Private Member Functions

Private Attributes

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ BaseTrafficGen()

◆ ~BaseTrafficGen()

Member Function Documentation

◆ allocateWaitingRespSlot()

◆ createDram()

◆ createDramRot()

◆ createExit()

◆ createHybrid()

◆ createIdle()

◆ createLinear()

◆ createNvm()

◆ createRandom()

◆ createStrided()

◆ createTrace()

◆ drain()

◆ getPort()

◆ init()

◆ nextGenerator()

◆ noProgress()

◆ recvReqRetry()

◆ recvTimingResp()

◆ retryReq()

◆ scheduleUpdate()

◆ serialize()

◆ start()

◆ transition()

◆ unserialize()

◆ update()

Friends And Related Symbol Documentation

◆ BaseGen

Member Data Documentation

◆ activeGenerator

◆ blockedWaitingResp

◆ elasticReq

◆ maxOutstandingReqs

◆ nextPacketTick

◆ nextTransitionTick

◆ noProgressEvent

◆ port

◆ progressCheck

◆ requestorId

◆ retryPkt

◆ retryPktTick

◆ stats

◆ streamGenerator

◆ system

◆ updateEvent

◆ waitingResp