A WayPartitioningPolicy filters the cache blocks available to a memory requestor (identified via PartitionID) based on the cache ways allocated to that requestor. More...

#include <way_pp.hh>

Inheritance diagram for gem5::partitioning_policy::WayPartitioningPolicy:

Public Member Functions
	WayPartitioningPolicy (const WayPartitioningPolicyParams &params)

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

void	notifyAcquire (const uint64_t partition_id) override
	Empty implementation as block allocations do not vary with number of allocated blocks for this policy.

void	notifyRelease (const uint64_t partition_id) override
	Empty implementation as block allocations do not vary with number of allocated blocks for this policy.

Public Member Functions inherited from gem5::partitioning_policy::BasePartitioningPolicy
	BasePartitioningPolicy (const BasePartitioningPolicyParams &params)

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 ()=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

Private Attributes
std::unordered_map< uint64_t, std::unordered_set< unsigned > >	partitionIdWays
	Map of policied PartitionIDs and their associated cache ways.

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 WayPartitioningPolicy filters the cache blocks available to a memory requestor (identified via PartitionID) based on the cache ways allocated to that requestor.

This policy has no effect on requests with unregistered PartitionIDs.

See also: BasePartitioningPolicy

Definition at line 63 of file way_pp.hh.

Constructor & Destructor Documentation

◆ WayPartitioningPolicy()

gem5::partitioning_policy::WayPartitioningPolicy::WayPartitioningPolicy ( const WayPartitioningPolicyParams & params )

Definition at line 53 of file way_pp.cc.

References gem5::X86ISA::count, DPRINTF, fatal_if, gem5::SimObject::params(), partitionIdWays, and warn.

Member Function Documentation

◆ filterByPartition()

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

overridevirtual

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

Implements gem5::partitioning_policy::BasePartitioningPolicy.

Definition at line 90 of file way_pp.cc.

References partitionIdWays.

◆ notifyAcquire()

void gem5::partitioning_policy::WayPartitioningPolicy::notifyAcquire ( const uint64_t partition_id )

inlineoverridevirtual

Empty implementation as block allocations do not vary with number of allocated blocks for this policy.

Parameters

partition_id PartitionID of the upstream memory request

Implements gem5::partitioning_policy::BasePartitioningPolicy.

Definition at line 78 of file way_pp.hh.

◆ notifyRelease()

void gem5::partitioning_policy::WayPartitioningPolicy::notifyRelease ( const uint64_t partition_id )

inlineoverridevirtual

Empty implementation as block allocations do not vary with number of allocated blocks for this policy.

Parameters

partition_id PartitionID of the upstream memory request

Implements gem5::partitioning_policy::BasePartitioningPolicy.

Definition at line 86 of file way_pp.hh.

Member Data Documentation

◆ partitionIdWays

std::unordered_map< uint64_t, std::unordered_set< unsigned > > gem5::partitioning_policy::WayPartitioningPolicy::partitionIdWays

private

Map of policied PartitionIDs and their associated cache ways.

Definition at line 93 of file way_pp.hh.

Referenced by filterByPartition(), and WayPartitioningPolicy().

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

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

Public Member Functions

Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ WayPartitioningPolicy()

Member Function Documentation

◆ filterByPartition()

◆ notifyAcquire()

◆ notifyRelease()

Member Data Documentation

◆ partitionIdWays