class Thread

A single thread of execution

Inheritance:

Public Methods

Thread( Computer* newComputer, Process* newParent, TIME newMemAccessRate, TIME localSynchRate, TIME globalSynchRate, const string newName="Thread", const ID newID=0)

Default constructor

~Thread()

Destructor

MEMAMT allocateSafeLocalMemory(MEMAMT allocated = 0.0)

bool allocateMemory()

void deallocateMemory()

ProcessEvent getNextEvent()

Returns the next event this thread will generate

ID getNextCommunication()

TIME getCPUReqTime(void)

bool getNextAccess(void)

Gets the next page of memory this thread will access

TIME nextCPUReqOk(void)

a signal to the thread object

void pageIn(void)

Simulates bringing in one page of data into main memory

void finishGlobalSynch()

void overallocation(MEMAMT netRAM, MEMAMT disk)

void suspend()

bool isEventLengthSet(void) const

TIME initEventInfo(TIME totalTime, ProcessEvent event)

Initializes event information (e.g. elapsed time is set to 0)

void resetEventInfo(void)

void updateEventInfo(void)

Updates event information

void recalculateEvent(void)

signals the thread that no more work should be done and the current event should be repeated

void restart(void)

restarts the current event

void quickRestart(void)

void useCPUTime(TIME amount)

Subtracts the amount passed from the CPU time remaining

void addNeighbor(ID computer)

Process* getParent(void) const

ProcessEvent getEvent(void) const

TIME getEventStart(void) const

TIME getEventTime(void) const

TIME getEventElapsed(void) const

TIME getEventRemaining(void) const

ID getNextCommId(void) const

TIME getCPUTimeLeft(void) const

unsigned long getTotalPageFaults(void) const

Computer* getHost(void)

TIME getSuspendedTime(void) const

void setParent(Process* newProcess)

Sets the process this thread belongs to

void setEventTime(const TIME amount)

Sets the amount of time this event will take to execute

void setMemoryAccessRate(const TIME amount)

Sets how often a memory access will occur.

void setPNRClient(PNRClient* client)

Inherited from SimObj:

Public Methods

string getName(void) const

ID getID(void) const

void setName(const string newName)

void setID(const ID newID)

virtual void clear(void)

virtual string toString(void) const

virtual bool activate(void)

Documentation

A component of a process (or job).

Thread( Computer* newComputer, Process* newParent, TIME newMemAccessRate, TIME localSynchRate, TIME globalSynchRate, const string newName="Thread", const ID newID=0)

~Thread()

MEMAMT allocateSafeLocalMemory(MEMAMT allocated = 0.0)

bool allocateMemory()

void deallocateMemory()

ProcessEvent getNextEvent()

A side effect of this function is that the event after the event being returned may be generated

ID getNextCommunication()

TIME getCPUReqTime(void)

bool getNextAccess(void)

This algorithm was lifted from one of Feitelson's papers.

TIME nextCPUReqOk(void)

This signal states that the CPU may be requested for any length of time and no page faults will result.

void pageIn(void)

Note that the data could be coming from disk or network RAM - the thread doesn't really care.

void finishGlobalSynch()

void overallocation(MEMAMT netRAM, MEMAMT disk)

void suspend()

bool isEventLengthSet(void) const

Returns:

whether the length of the current event has been calculated or not.

TIME initEventInfo(TIME totalTime, ProcessEvent event)

void resetEventInfo(void)

void updateEventInfo(void)

Updates elapsed time and remaining time (among others) based on current time and when the event was last updated.

void recalculateEvent(void)

void restart(void)

void quickRestart(void)

void useCPUTime(TIME amount)

void addNeighbor(ID computer)

Process* getParent(void) const

Returns:

the parent process

ProcessEvent getEvent(void) const

Returns:

the currently executing (or suspended) event

TIME getEventStart(void) const

Start time is really the last update time. Start time could either be the real start time, or it could be when updateEventInfo() was last called.

Returns:

when the event was "started"

TIME getEventTime(void) const

Returns:

the total amount of (service) time the event will take

TIME getEventElapsed(void) const

Returns:

the amount of (service) time the event has gotten so far

TIME getEventRemaining(void) const

Returns:

the amount of (service) time the event must still receive in order to complete

ID getNextCommId(void) const

Returns:

the next computer we will communicate with

TIME getCPUTimeLeft(void) const

Returns:

the amount of CPU time that must still be completed before this thread will finish

unsigned long getTotalPageFaults(void) const

Computer* getHost(void)

TIME getSuspendedTime(void) const

void setParent(Process* newProcess)

void setEventTime(const TIME amount)

void setMemoryAccessRate(const TIME amount)

void setPNRClient(PNRClient* client)

This class has no child classes.

Author:

John Oleszkiewicz

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