gem5::LinearGen Class Reference

The linear generator generates sequential requests from a start to an end address, with a fixed block size. More...

#include <linear_gen.hh>

Inheritance diagram for gem5::LinearGen:

Public Member Functions
	LinearGen (SimObject &obj, RequestorID requestor_id, Tick _duration, Addr start_addr, Addr end_addr, Addr _blocksize, Addr cacheline_size, Tick min_period, Tick max_period, uint8_t read_percent, Addr data_limit)
	Create a linear address sequence generator.
void	enter ()
	Enter this generator state.
PacketPtr	getNextPacket ()
	Get the next generated packet.
Tick	nextPacketTick (bool elastic, Tick delay) const
	Determine the tick when the next packet is available.
Public Member Functions inherited from gem5::StochasticGen
	StochasticGen (SimObject &obj, RequestorID requestor_id, Tick _duration, Addr start_addr, Addr end_addr, Addr _blocksize, Addr cacheline_size, Tick min_period, Tick max_period, uint8_t read_percent, Addr data_limit)
Public Member Functions inherited from gem5::BaseGen
	BaseGen (SimObject &obj, RequestorID requestor_id, Tick _duration)
	Create a base generator.
virtual	~BaseGen ()
std::string	name () const
	Get the name, useful for DPRINTFs.
virtual void	exit ()
	Exit this generator state.

Private Attributes
Addr	nextAddr
	Address of next request.
Addr	dataManipulated
	Counter to determine the amount of data manipulated.

Additional Inherited Members
Public Attributes inherited from gem5::BaseGen
const Tick	duration
	Time to spend in this state.
Protected Member Functions inherited from gem5::BaseGen
PacketPtr	getPacket (Addr addr, unsigned size, const MemCmd &cmd, Request::FlagsType flags=0)
	Generate a new request and associated packet.
Protected Attributes inherited from gem5::StochasticGen
const Addr	startAddr
	Start of address range.
const Addr	endAddr
	End of address range.
const Addr	blocksize
	Blocksize and address increment.
const Addr	cacheLineSize
	Cache line size in the simulated system.
const Tick	minPeriod
	Request generation period.
const Tick	maxPeriod
const uint8_t	readPercent
	Percent of generated transactions that should be reads.
const Addr	dataLimit
	Maximum amount of data to manipulate.
Protected Attributes inherited from gem5::BaseGen
const std::string	_name
	Name to use for status and debug printing.
const RequestorID	requestorId
	The RequestorID used for generating requests.

Detailed Description

The linear generator generates sequential requests from a start to an end address, with a fixed block size.

A fraction of the requests are reads, as determined by the read percent. There is an optional data limit for when to stop generating new requests.

Definition at line 62 of file linear_gen.hh.

Constructor & Destructor Documentation

LinearGen()

gem5::LinearGen::LinearGen ( SimObject & obj, RequestorID requestor_id, Tick _duration, Addr start_addr, Addr end_addr, Addr _blocksize, Addr cacheline_size, Tick min_period, Tick max_period, uint8_t read_percent, Addr data_limit )

inline

Create a linear address sequence generator.

Set min_period == max_period for a fixed inter-transaction time.

Parameters

obj	SimObject owning this sequence generator
requestor_id	RequestorID related to the memory requests
_duration	duration of this state before transitioning
start_addr	Start address
end_addr	End address
_blocksize	Size used for transactions injected
cacheline_size	cache line size in the system
min_period	Lower limit of random inter-transaction time
max_period	Upper limit of random inter-transaction time
read_percent	Percent of transactions that are reads
data_limit	Upper limit on how much data to read/write

Definition at line 84 of file linear_gen.hh.

Member Function Documentation

enter()

void gem5::LinearGen::enter ( )

virtual

Enter this generator state.

Implements gem5::BaseGen.

Definition at line 50 of file linear_gen.cc.

References dataManipulated, nextAddr, and gem5::StochasticGen::startAddr.

getNextPacket()

PacketPtr gem5::LinearGen::getNextPacket ( )

virtual

Get the next generated packet.

Returns

A packet to be sent at the current tick

Implements gem5::BaseGen.

Definition at line 58 of file linear_gen.cc.

References gem5::StochasticGen::blocksize, dataManipulated, DPRINTF, gem5::StochasticGen::endAddr, gem5::BaseGen::getPacket(), nextAddr, gem5::Random::random(), gem5::random_mt, gem5::StochasticGen::readPercent, gem5::MemCmd::ReadReq, gem5::StochasticGen::startAddr, and gem5::MemCmd::WriteReq.

nextPacketTick()

Tick gem5::LinearGen::nextPacketTick ( bool elastic, Tick delay ) const

virtual

Determine the tick when the next packet is available.

MaxTick means that there will not be any further packets in the current activation cycle of the generator.

Parameters

elastic	should the injection respond to flow control or not
delay	time the previous packet spent waiting

Returns

next tick when a packet is available

Implements gem5::BaseGen.

Definition at line 91 of file linear_gen.cc.

References gem5::curTick(), gem5::StochasticGen::dataLimit, dataManipulated, DPRINTF, gem5::StochasticGen::maxPeriod, gem5::MaxTick, gem5::StochasticGen::minPeriod, gem5::Random::random(), and gem5::random_mt.

Member Data Documentation

dataManipulated

Addr gem5::LinearGen::dataManipulated

private

Counter to determine the amount of data manipulated.

Used to determine if we should continue generating requests.

Definition at line 112 of file linear_gen.hh.

Referenced by enter(), getNextPacket(), and nextPacketTick().

nextAddr

Addr gem5::LinearGen::nextAddr

private

Address of next request.

Definition at line 105 of file linear_gen.hh.

Referenced by enter(), and getNextPacket().

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

• cpu/testers/traffic_gen/linear_gen.hh
• cpu/testers/traffic_gen/linear_gen.cc