A Partitioning Policy is a cache partitioning mechanism that limits the cache block allocations in a cache based on a PartitionID identifier. More...

#include <base_pp.hh>

Inheritance diagram for gem5::partitioning_policy::BasePartitioningPolicy:

Public Member Functions
	BasePartitioningPolicy (const BasePartitioningPolicyParams &params)

virtual void	filterByPartition (std::vector< ReplaceableEntry * > &entries, const uint64_t partition_id) const =0
	Filters the allocatable cache blocks for a memory request based on its PartitionID and policy allocation.

virtual void	notifyAcquire (const uint64_t partition_id)=0
	Notify of acquisition of ownership of a cache line.

virtual void	notifyRelease (const uint64_t partition_id)=0
	Notify of release of ownership of a cache line.

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

	SimObject (const Params &p)

virtual	~SimObject ()

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

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

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 (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

Additional Inherited Members
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.

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 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.

Detailed Description

A Partitioning Policy is a cache partitioning mechanism that limits the cache block allocations in a cache based on a PartitionID identifier.

This identifier may be set to any upstream memory request by attaching the PartitionID to it. The way the partition ID is attached/extracted from the request depends on the partitioning manager.

See the use of the PartitionFieldExtension in Arm as an example.

When partitioning policies are in place, the allocatable cache blocks for this memory request will be filtered based on its PartitionID.

Definition at line 67 of file base_pp.hh.

Constructor & Destructor Documentation

◆ BasePartitioningPolicy()

gem5::partitioning_policy::BasePartitioningPolicy::BasePartitioningPolicy ( const BasePartitioningPolicyParams & params )

Definition at line 48 of file base_pp.cc.

Member Function Documentation

◆ filterByPartition()

virtual void gem5::partitioning_policy::BasePartitioningPolicy::filterByPartition	(	std::vector< ReplaceableEntry * > &	entries,
		const uint64_t	partition_id
	)		const

pure virtual

Filters the allocatable cache blocks for a memory request based on its PartitionID and policy allocation.

Parameters

entries	candidate cache blocks for this request; filtered in place
partition_id	PartitionID of the upstream memory request

Implemented in gem5::partitioning_policy::MaxCapacityPartitioningPolicy, and gem5::partitioning_policy::WayPartitioningPolicy.

◆ notifyAcquire()

virtual void gem5::partitioning_policy::BasePartitioningPolicy::notifyAcquire ( const uint64_t partition_id )

pure virtual

Notify of acquisition of ownership of a cache line.

Parameters

partition_id PartitionID of the upstream memory request

Implemented in gem5::partitioning_policy::MaxCapacityPartitioningPolicy, and gem5::partitioning_policy::WayPartitioningPolicy.

◆ notifyRelease()

virtual void gem5::partitioning_policy::BasePartitioningPolicy::notifyRelease ( const uint64_t partition_id )

pure virtual

Notify of release of ownership of a cache line.

Parameters

partition_id PartitionID of the upstream memory request

Implemented in gem5::partitioning_policy::MaxCapacityPartitioningPolicy, and gem5::partitioning_policy::WayPartitioningPolicy.

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

mem/cache/tags/partitioning_policies/base_pp.hh
mem/cache/tags/partitioning_policies/base_pp.cc

Public Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ BasePartitioningPolicy()

Member Function Documentation

◆ filterByPartition()

◆ notifyAcquire()

◆ notifyRelease()