#include <MessageBuffer.hh>

Inheritance diagram for MessageBuffer:

Public Types
typedef MessageBufferParams	Params

Public Types inherited from SimObject
typedef SimObjectParams	Params

Public Member Functions
	MessageBuffer (const Params &p)

void	reanalyzeMessages (Addr addr, Tick current_time)

void	reanalyzeAllMessages (Tick current_time)

void	stallMessage (Addr addr, Tick current_time)

bool	hasStalledMsg (Addr addr) const

bool	isReady (Tick current_time) const

void	delayHead (Tick current_time, Tick delta)

bool	areNSlotsAvailable (unsigned int n, Tick curTime)

int	getPriority ()

void	setPriority (int rank)

void	setConsumer (Consumer *consumer)

Consumer *	getConsumer ()

bool	getOrdered ()

const Message *	peek () const
	Function for extracting the message at the head of the message queue. More...

const MsgPtr &	peekMsgPtr () const

void	enqueue (MsgPtr message, Tick curTime, Tick delta)

void	deferEnqueueingMessage (Addr addr, MsgPtr message)

void	enqueueDeferredMessages (Addr addr, Tick curTime, Tick delay)

bool	isDeferredMsgMapEmpty (Addr addr) const

Tick	dequeue (Tick current_time, bool decrement_messages=true)
	Updates the delay cycles of the message at the head of the queue, removes it from the queue and returns its total delay. More...

void	registerDequeueCallback (std::function< void()> callback)

void	unregisterDequeueCallback ()

void	recycle (Tick current_time, Tick recycle_latency)

bool	isEmpty () const

bool	isStallMapEmpty ()

unsigned int	getStallMapSize ()

unsigned int	getSize (Tick curTime)

void	clear ()

void	print (std::ostream &out) const

void	clearStats ()

void	setIncomingLink (int link_id)

void	setVnet (int net)

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

uint32_t	functionalWrite (Packet *pkt)

bool	functionalRead (Packet *pkt)

bool	functionalRead (Packet *pkt, WriteMask &mask)

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

	SimObject (const Params &p)

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	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
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. More...

void	setCurTick (Tick newVal)

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

	EventManager (EventManager *em)

	EventManager (EventQueue *eq)

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 Stats::Group
	Group (Group parent, const char name=nullptr)
	Construct a new statistics group. More...

virtual	~Group ()

virtual void	regStats ()
	Callback to set stat parameters. More...

virtual void	resetStats ()
	Callback to reset stats. More...

virtual void	preDumpStats ()
	Callback before stats are dumped. More...

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

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

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

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

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

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

	Group ()=delete

	Group (const Group &)=delete

Group &	operator= (const Group &)=delete

Private Types
typedef std::map< Addr, std::list< MsgPtr > >	StallMsgMapType

typedef std::unordered_map< Addr, std::vector< MsgPtr > >	DeferredMsgMapType
	A map from line addresses to corresponding vectors of messages that are deferred for enqueueing. More...

Private Member Functions
void	reanalyzeList (std::list< MsgPtr > &, Tick)

uint32_t	functionalAccess (Packet pkt, bool is_read, WriteMask mask)

Private Attributes
Consumer *	m_consumer
	Consumer to signal a wakeup(), can be NULL. More...

std::vector< MsgPtr >	m_prio_heap

std::function< void()>	m_dequeue_callback

StallMsgMapType	m_stall_msg_map
	A map from line addresses to lists of stalled messages for that line. More...

DeferredMsgMapType	m_deferred_msg_map

int	m_stall_map_size
	Current size of the stall map. More...

const unsigned int	m_max_size
	The maximum capacity. More...

Tick	m_time_last_time_size_checked

unsigned int	m_size_last_time_size_checked

Tick	m_time_last_time_enqueue

Tick	m_time_last_time_pop

Tick	m_last_arrival_time

unsigned int	m_size_at_cycle_start

unsigned int	m_stalled_at_cycle_start

unsigned int	m_msgs_this_cycle

uint64_t	m_msg_counter

int	m_priority_rank

const bool	m_strict_fifo

const MessageRandomization	m_randomization

const bool	m_allow_zero_latency

int	m_input_link_id

int	m_vnet_id

Stats::Scalar	m_not_avail_count

Stats::Average	m_buf_msgs

Stats::Average	m_stall_time

Stats::Scalar	m_stall_count

Stats::Formula	m_occupancy

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 ()
	Gets the fully-qualified name of the active section. More...

static void	serializeAll (const std::string &cpt_dir)
	Serializes all the SimObjects. More...

static void	unserializeGlobals (CheckpointIn &cp)

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 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...

Detailed Description

Definition at line 68 of file MessageBuffer.hh.

Member Typedef Documentation

◆ DeferredMsgMapType

typedef std::unordered_map<Addr, std::vector<MsgPtr> > MessageBuffer::DeferredMsgMapType

private

A map from line addresses to corresponding vectors of messages that are deferred for enqueueing.

Messages in this map are waiting to be enqueued into the message buffer.

Definition at line 218 of file MessageBuffer.hh.

◆ Params

typedef MessageBufferParams MessageBuffer::Params

Definition at line 71 of file MessageBuffer.hh.

◆ StallMsgMapType

typedef std::map<Addr, std::list<MsgPtr> > MessageBuffer::StallMsgMapType

private

Definition at line 196 of file MessageBuffer.hh.

Constructor & Destructor Documentation

◆ MessageBuffer()

MessageBuffer::MessageBuffer ( const Params & p )

Member Function Documentation

◆ areNSlotsAvailable()

bool MessageBuffer::areNSlotsAvailable	(	unsigned int	n,
		Tick	curTime
	)

Definition at line 121 of file MessageBuffer.cc.

References DPRINTF, m_max_size, m_msgs_this_cycle, m_not_avail_count, m_prio_heap, m_size_at_cycle_start, m_stall_map_size, m_stalled_at_cycle_start, m_time_last_time_enqueue, m_time_last_time_pop, and ArmISA::n.

Referenced by Throttle::operateVnet().

◆ clear()

void MessageBuffer::clear ( )

Definition at line 324 of file MessageBuffer.cc.

References m_msg_counter, m_msgs_this_cycle, m_prio_heap, m_size_at_cycle_start, m_stalled_at_cycle_start, m_time_last_time_enqueue, and m_time_last_time_pop.

◆ clearStats()

void MessageBuffer::clearStats ( )

inline

Definition at line 147 of file MessageBuffer.hh.

References m_msg_counter, and m_not_avail_count.

◆ deferEnqueueingMessage()

void MessageBuffer::deferEnqueueingMessage	(	Addr	addr,
		MsgPtr	message
	)

Definition at line 439 of file MessageBuffer.cc.

References X86ISA::addr, DPRINTF, and m_deferred_msg_map.

◆ delayHead()

void MessageBuffer::delayHead	(	Tick	current_time,
		Tick	delta
	)

inline

Definition at line 84 of file MessageBuffer.hh.

References enqueue(), ArmISA::m, and m_prio_heap.

◆ dequeue()

Tick MessageBuffer::dequeue	(	Tick	current_time,
		bool	decrement_messages = `true`
	)

Updates the delay cycles of the message at the head of the queue, removes it from the queue and returns its total delay.

Definition at line 273 of file MessageBuffer.cc.

References curTick(), DPRINTF, isReady(), m_buf_msgs, m_dequeue_callback, m_prio_heap, m_size_at_cycle_start, m_stall_map_size, m_stall_time, m_stalled_at_cycle_start, and m_time_last_time_pop.

Referenced by PerfectSwitch::operateMessageBuffer(), Throttle::operateVnet(), and stallMessage().

◆ enqueue()

void MessageBuffer::enqueue	(	MsgPtr	message,
		Tick	curTime,
		Tick	delta
	)

Definition at line 191 of file MessageBuffer.cc.

References DPRINTF, Message::getLastEnqueueTime(), RubySystem::getRandomization(), RubySystem::getWarmupEnabled(), m_allow_zero_latency, m_buf_msgs, m_consumer, m_last_arrival_time, m_max_size, m_msg_counter, m_msgs_this_cycle, m_prio_heap, m_randomization, m_stall_map_size, m_strict_fifo, m_time_last_time_enqueue, m_vnet_id, SimObject::name(), panic, panic_if, random_time(), Consumer::scheduleEventAbsolute(), Message::setLastEnqueueTime(), Message::setMsgCounter(), Consumer::storeEventInfo(), and Message::updateDelayedTicks().

Referenced by delayHead(), enqueueDeferredMessages(), VIPERCoalescer::invTCP(), DMASequencer::issueNext(), VIPERCoalescer::issueRequest(), Sequencer::issueRequest(), DMASequencer::makeRequest(), Throttle::operateVnet(), and AbstractController::recvTimingResp().

◆ enqueueDeferredMessages()

void MessageBuffer::enqueueDeferredMessages	(	Addr	addr,
		Tick	curTime,
		Tick	delay
	)

Definition at line 447 of file MessageBuffer.cc.

References X86ISA::addr, enqueue(), isDeferredMsgMapEmpty(), ArmISA::m, and m_deferred_msg_map.

◆ functionalAccess()

uint32_t MessageBuffer::functionalAccess	(	Packet *	pkt,
		bool	is_read,
		WriteMask *	mask
	)

private

Definition at line 489 of file MessageBuffer.cc.

References DPRINTF, Message::functionalRead(), Message::functionalWrite(), Packet::getAddr(), ArmISA::i, m_prio_heap, m_stall_msg_map, and ArmISA::mask.

Referenced by functionalRead(), and functionalWrite().

◆ functionalRead() [1/2]

bool MessageBuffer::functionalRead ( Packet * pkt )

inline

Definition at line 170 of file MessageBuffer.hh.

References functionalAccess().

Referenced by AbstractController::functionalMemoryRead().

◆ functionalRead() [2/2]

bool MessageBuffer::functionalRead	(	Packet *	pkt,
		WriteMask &	mask
	)

inline

Definition at line 176 of file MessageBuffer.hh.

References functionalAccess(), and ArmISA::mask.

◆ functionalWrite()

uint32_t MessageBuffer::functionalWrite ( Packet * pkt )

inline

Definition at line 161 of file MessageBuffer.hh.

References functionalAccess().

◆ getConsumer()

Consumer* MessageBuffer::getConsumer ( )

inline

Definition at line 107 of file MessageBuffer.hh.

References m_consumer.

◆ getOrdered()

bool MessageBuffer::getOrdered ( )

inline

Definition at line 109 of file MessageBuffer.hh.

References m_strict_fifo.

◆ getPort()

Port& MessageBuffer::getPort	(	const std::string &	if_name,
		PortID	idx = `InvalidPortID`
	)

inlineoverridevirtual

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 SimObject.

Definition at line 153 of file MessageBuffer.hh.

References RubyDummyPort::instance().

◆ getPriority()

int MessageBuffer::getPriority ( )

inline

Definition at line 94 of file MessageBuffer.hh.

References m_priority_rank.

◆ getSize()

unsigned int MessageBuffer::getSize ( Tick curTime )

Definition at line 110 of file MessageBuffer.cc.

References m_prio_heap, m_size_last_time_size_checked, and m_time_last_time_size_checked.

◆ getStallMapSize()

unsigned int MessageBuffer::getStallMapSize ( )

inline

Definition at line 141 of file MessageBuffer.hh.

References m_stall_msg_map.

◆ hasStalledMsg()

bool MessageBuffer::hasStalledMsg ( Addr addr ) const

Definition at line 433 of file MessageBuffer.cc.

References X86ISA::addr, and m_stall_msg_map.

◆ isDeferredMsgMapEmpty()

bool MessageBuffer::isDeferredMsgMapEmpty ( Addr addr ) const

Definition at line 463 of file MessageBuffer.cc.

References X86ISA::addr, and m_deferred_msg_map.

Referenced by enqueueDeferredMessages().

◆ isEmpty()

bool MessageBuffer::isEmpty ( ) const

inline

Definition at line 139 of file MessageBuffer.hh.

References m_prio_heap.

◆ isReady()

bool MessageBuffer::isReady ( Tick current_time ) const

Definition at line 482 of file MessageBuffer.cc.

References m_prio_heap.

Referenced by dequeue(), PerfectSwitch::operateMessageBuffer(), Throttle::operateVnet(), recycle(), and stallMessage().

◆ isStallMapEmpty()

bool MessageBuffer::isStallMapEmpty ( )

inline

Definition at line 140 of file MessageBuffer.hh.

References m_stall_msg_map.

◆ peek()

const Message * MessageBuffer::peek ( ) const

Function for extracting the message at the head of the message queue.

The function assumes that the queue is nonempty.

Definition at line 168 of file MessageBuffer.cc.

References DPRINTF, and m_prio_heap.

◆ peekMsgPtr()

const MsgPtr& MessageBuffer::peekMsgPtr ( ) const

inline

Definition at line 115 of file MessageBuffer.hh.

References m_prio_heap.

Referenced by PerfectSwitch::operateMessageBuffer(), and Throttle::operateVnet().

◆ print()

void MessageBuffer::print ( std::ostream & out ) const

Definition at line 469 of file MessageBuffer.cc.

References ccprintf(), m_consumer, m_prio_heap, and SimObject::name().

Referenced by operator<<().

◆ reanalyzeAllMessages()

void MessageBuffer::reanalyzeAllMessages ( Tick current_time )

Definition at line 391 of file MessageBuffer.cc.

References DPRINTF, m_stall_map_size, m_stall_msg_map, and reanalyzeList().

◆ reanalyzeList()

void MessageBuffer::reanalyzeList	(	std::list< MsgPtr > &	lt,
		Tick	schdTick
	)

private

Definition at line 353 of file MessageBuffer.cc.

References DPRINTF, PowerISA::lt, ArmISA::m, m_consumer, m_prio_heap, and Consumer::scheduleEventAbsolute().

Referenced by reanalyzeAllMessages(), and reanalyzeMessages().

◆ reanalyzeMessages()

void MessageBuffer::reanalyzeMessages	(	Addr	addr,
		Tick	current_time
	)

Definition at line 373 of file MessageBuffer.cc.

References X86ISA::addr, DPRINTF, m_stall_map_size, m_stall_msg_map, and reanalyzeList().

Referenced by AbstractController::wakeUpBuffer().

◆ recycle()

void MessageBuffer::recycle	(	Tick	current_time,
		Tick	recycle_latency
	)

Definition at line 337 of file MessageBuffer.cc.

References DPRINTF, isReady(), m_consumer, m_prio_heap, and Consumer::scheduleEventAbsolute().

◆ registerDequeueCallback()

void MessageBuffer::registerDequeueCallback ( std::function< void()> callback )

Definition at line 312 of file MessageBuffer.cc.

References m_dequeue_callback.

◆ setConsumer()

void MessageBuffer::setConsumer ( Consumer * consumer )

inline

Definition at line 96 of file MessageBuffer.hh.

References DPRINTF, fatal, and m_consumer.

Referenced by Throttle::addLinks(), and AbstractController::init().

◆ setIncomingLink()

void MessageBuffer::setIncomingLink ( int link_id )

inline

Definition at line 149 of file MessageBuffer.hh.

References m_input_link_id.

◆ setPriority()

void MessageBuffer::setPriority ( int rank )

inline

Definition at line 95 of file MessageBuffer.hh.

References m_priority_rank.

◆ setVnet()

void MessageBuffer::setVnet ( int net )

inline

Definition at line 150 of file MessageBuffer.hh.

References m_vnet_id.

◆ stallMessage()

void MessageBuffer::stallMessage	(	Addr	addr,
		Tick	current_time
	)

Definition at line 411 of file MessageBuffer.cc.

References X86ISA::addr, dequeue(), DPRINTF, getOffset(), isReady(), m_prio_heap, m_stall_count, m_stall_map_size, and m_stall_msg_map.

◆ unregisterDequeueCallback()

void MessageBuffer::unregisterDequeueCallback ( )

Definition at line 318 of file MessageBuffer.cc.

References m_dequeue_callback.

Member Data Documentation

◆ m_allow_zero_latency

const bool MessageBuffer::m_allow_zero_latency

private

Definition at line 254 of file MessageBuffer.hh.

Referenced by enqueue().

◆ m_buf_msgs

Stats::Average MessageBuffer::m_buf_msgs

private

Definition at line 261 of file MessageBuffer.hh.

Referenced by dequeue(), enqueue(), and MessageBuffer().

◆ m_consumer

Consumer* MessageBuffer::m_consumer

private

Consumer to signal a wakeup(), can be NULL.

Definition at line 189 of file MessageBuffer.hh.

Referenced by enqueue(), getConsumer(), MessageBuffer(), print(), reanalyzeList(), recycle(), and setConsumer().

◆ m_deferred_msg_map

DeferredMsgMapType MessageBuffer::m_deferred_msg_map

private

Definition at line 219 of file MessageBuffer.hh.

Referenced by deferEnqueueingMessage(), enqueueDeferredMessages(), and isDeferredMsgMapEmpty().

◆ m_dequeue_callback

std::function<void()> MessageBuffer::m_dequeue_callback

private

Definition at line 192 of file MessageBuffer.hh.

Referenced by dequeue(), MessageBuffer(), registerDequeueCallback(), and unregisterDequeueCallback().

◆ m_input_link_id

int MessageBuffer::m_input_link_id

private

Definition at line 256 of file MessageBuffer.hh.

Referenced by MessageBuffer(), and setIncomingLink().

◆ m_last_arrival_time

Tick MessageBuffer::m_last_arrival_time

private

Definition at line 244 of file MessageBuffer.hh.

Referenced by enqueue().

◆ m_max_size

const unsigned int MessageBuffer::m_max_size

private

The maximum capacity.

For finite-sized buffers, m_max_size stores a number greater than 0 to indicate the maximum allowed number of messages in the buffer at any time. To get infinitely-sized buffers, set buffer size: m_max_size = 0

Definition at line 235 of file MessageBuffer.hh.

Referenced by areNSlotsAvailable(), enqueue(), and MessageBuffer().

◆ m_msg_counter

uint64_t MessageBuffer::m_msg_counter

private

Definition at line 250 of file MessageBuffer.hh.

Referenced by clear(), clearStats(), enqueue(), and MessageBuffer().

◆ m_msgs_this_cycle

unsigned int MessageBuffer::m_msgs_this_cycle

private

Definition at line 248 of file MessageBuffer.hh.

Referenced by areNSlotsAvailable(), clear(), enqueue(), and MessageBuffer().

◆ m_not_avail_count

Stats::Scalar MessageBuffer::m_not_avail_count

private

Definition at line 259 of file MessageBuffer.hh.

Referenced by areNSlotsAvailable(), clearStats(), and MessageBuffer().

◆ m_occupancy

Stats::Formula MessageBuffer::m_occupancy

private

Definition at line 264 of file MessageBuffer.hh.

Referenced by MessageBuffer().

◆ m_prio_heap

std::vector<MsgPtr> MessageBuffer::m_prio_heap

private

Definition at line 190 of file MessageBuffer.hh.

Referenced by areNSlotsAvailable(), clear(), delayHead(), dequeue(), enqueue(), functionalAccess(), getSize(), isEmpty(), isReady(), peek(), peekMsgPtr(), print(), reanalyzeList(), recycle(), and stallMessage().

◆ m_priority_rank

int MessageBuffer::m_priority_rank

private

Definition at line 251 of file MessageBuffer.hh.

Referenced by getPriority(), MessageBuffer(), and setPriority().

◆ m_randomization

const MessageRandomization MessageBuffer::m_randomization

private

Definition at line 253 of file MessageBuffer.hh.

Referenced by enqueue().

◆ m_size_at_cycle_start

unsigned int MessageBuffer::m_size_at_cycle_start

private

Definition at line 246 of file MessageBuffer.hh.

Referenced by areNSlotsAvailable(), clear(), dequeue(), and MessageBuffer().

◆ m_size_last_time_size_checked

unsigned int MessageBuffer::m_size_last_time_size_checked

private

Definition at line 238 of file MessageBuffer.hh.

Referenced by getSize(), and MessageBuffer().

◆ m_stall_count

Stats::Scalar MessageBuffer::m_stall_count

private

Definition at line 263 of file MessageBuffer.hh.

Referenced by MessageBuffer(), and stallMessage().

◆ m_stall_map_size

int MessageBuffer::m_stall_map_size

private

Current size of the stall map.

Track the number of messages held in stall map lists. This is used to ensure that if the buffer is finite-sized, it blocks further requests when the m_prio_heap and m_stall_msg_map contain m_max_size messages.

Definition at line 227 of file MessageBuffer.hh.

Referenced by areNSlotsAvailable(), dequeue(), enqueue(), reanalyzeAllMessages(), reanalyzeMessages(), and stallMessage().

◆ m_stall_msg_map

StallMsgMapType MessageBuffer::m_stall_msg_map

private

A map from line addresses to lists of stalled messages for that line.

If this buffer allows the receiver to stall messages, on a stall request, the stalled message is removed from the m_prio_heap and placed in the m_stall_msg_map. Messages are held there until the receiver requests they be reanalyzed, at which point they are moved back to m_prio_heap.

NOTE: The stall map holds messages in the order in which they were initially received, and when a line is unblocked, the messages are moved back to the m_prio_heap in the same order. This prevents starving older requests with younger ones.

Definition at line 211 of file MessageBuffer.hh.

Referenced by functionalAccess(), getStallMapSize(), hasStalledMsg(), isStallMapEmpty(), MessageBuffer(), reanalyzeAllMessages(), reanalyzeMessages(), and stallMessage().

◆ m_stall_time

Stats::Average MessageBuffer::m_stall_time

private

Definition at line 262 of file MessageBuffer.hh.

Referenced by dequeue(), and MessageBuffer().

◆ m_stalled_at_cycle_start

unsigned int MessageBuffer::m_stalled_at_cycle_start

private

Definition at line 247 of file MessageBuffer.hh.

Referenced by areNSlotsAvailable(), clear(), dequeue(), and MessageBuffer().

◆ m_strict_fifo

const bool MessageBuffer::m_strict_fifo

private

Definition at line 252 of file MessageBuffer.hh.

Referenced by enqueue(), and getOrdered().

◆ m_time_last_time_enqueue

Tick MessageBuffer::m_time_last_time_enqueue

private

Definition at line 242 of file MessageBuffer.hh.

Referenced by areNSlotsAvailable(), clear(), and enqueue().

◆ m_time_last_time_pop

Tick MessageBuffer::m_time_last_time_pop

private

Definition at line 243 of file MessageBuffer.hh.

Referenced by areNSlotsAvailable(), clear(), and dequeue().

◆ m_time_last_time_size_checked

Tick MessageBuffer::m_time_last_time_size_checked

private

Definition at line 237 of file MessageBuffer.hh.

Referenced by getSize().

◆ m_vnet_id

int MessageBuffer::m_vnet_id

private

Definition at line 257 of file MessageBuffer.hh.

Referenced by enqueue(), MessageBuffer(), and setVnet().

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

mem/ruby/network/MessageBuffer.hh
mem/ruby/network/MessageBuffer.cc

Public Types

Public Member Functions

Private Types

Private Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Member Typedef Documentation

◆ DeferredMsgMapType

◆ Params

◆ StallMsgMapType

Constructor & Destructor Documentation

◆ MessageBuffer()

Member Function Documentation

◆ areNSlotsAvailable()

◆ clear()

◆ clearStats()

◆ deferEnqueueingMessage()

◆ delayHead()

◆ dequeue()

◆ enqueue()

◆ enqueueDeferredMessages()

◆ functionalAccess()

◆ functionalRead() [1/2]

◆ functionalRead() [2/2]

◆ functionalWrite()

◆ getConsumer()

◆ getOrdered()

◆ getPort()

◆ getPriority()

◆ getSize()

◆ getStallMapSize()

◆ hasStalledMsg()

◆ isDeferredMsgMapEmpty()

◆ isEmpty()

◆ isReady()

◆ isStallMapEmpty()

◆ peek()

◆ peekMsgPtr()

◆ print()

◆ reanalyzeAllMessages()

◆ reanalyzeList()

◆ reanalyzeMessages()

◆ recycle()

◆ registerDequeueCallback()

◆ setConsumer()

◆ setIncomingLink()

◆ setPriority()

◆ setVnet()

◆ stallMessage()

◆ unregisterDequeueCallback()

Member Data Documentation

◆ m_allow_zero_latency

◆ m_buf_msgs

◆ m_consumer

◆ m_deferred_msg_map

◆ m_dequeue_callback

◆ m_input_link_id

◆ m_last_arrival_time

◆ m_max_size

◆ m_msg_counter

◆ m_msgs_this_cycle

◆ m_not_avail_count

◆ m_occupancy

◆ m_prio_heap

◆ m_priority_rank

◆ m_randomization

◆ m_size_at_cycle_start

◆ m_size_last_time_size_checked

◆ m_stall_count

◆ m_stall_map_size

◆ m_stall_msg_map

◆ m_stall_time

◆ m_stalled_at_cycle_start

◆ m_strict_fifo

◆ m_time_last_time_enqueue

◆ m_time_last_time_pop

◆ m_time_last_time_size_checked

◆ m_vnet_id