Generator to read protobuf trace containing memory requests at fixed timestamps, perform flow control and issue memory requests. More...

#include <trace_cpu.hh>

Classes
struct	FixedRetryGenStatGroup

class	InputStream
	The InputStream encapsulates a trace file and the internal buffers and populates TraceElements based on the input. More...

struct	TraceElement
	This struct stores a line in the trace file. More...

Public Member Functions
	FixedRetryGen (TraceCPU &_owner, const std::string &_name, RequestPort &_port, RequestorID requestor_id, const std::string &trace_file)

Tick	init ()
	Called from TraceCPU init().

bool	tryNext ()
	This tries to send current or retry packet and returns true if successfull.

const std::string &	name () const
	Returns name of the FixedRetryGen instance.

bool	send (Addr addr, unsigned size, const MemCmd &cmd, Request::FlagsType flags, Addr pc)
	Creates a new request assigning the request parameters passed by the arguments.

void	exit ()
	Exit the FixedRetryGen.

bool	nextExecute ()
	Reads a line of the trace file.

bool	isTraceComplete ()
	Returns the traceComplete variable which is set when end of the input trace file is reached.

int64_t	tickDelta ()

Protected Attributes
gem5::TraceCPU::FixedRetryGen::FixedRetryGenStatGroup	fixedStats

Private Attributes
TraceCPU &	owner
	Reference of the TraceCPU.

RequestPort &	port
	Reference of the port to be used to issue memory requests.

const RequestorID	requestorId
	RequestorID used for the requests being sent.

InputStream	trace
	Input stream used for reading the input trace file.

std::string	genName
	String to store the name of the FixedRetryGen.

PacketPtr	retryPkt
	PacketPtr used to store the packet to retry.

int64_t	delta
	Stores the difference in the send ticks of the current and last packets.

bool	traceComplete
	Set to true when end of trace is reached.

TraceElement	currElement
	Store an element read from the trace to send as the next packet.

Detailed Description

Generator to read protobuf trace containing memory requests at fixed timestamps, perform flow control and issue memory requests.

If L1 cache port sends packet succesfully, determine the tick to send the next packet else wait for retry from cache.

Definition at line 312 of file trace_cpu.hh.

Constructor & Destructor Documentation

◆ FixedRetryGen()

gem5::TraceCPU::FixedRetryGen::FixedRetryGen	(	TraceCPU &	_owner,
		const std::string &	_name,
		RequestPort &	_port,
		RequestorID	requestor_id,
		const std::string &	trace_file )

inline

Definition at line 392 of file trace_cpu.hh.

References gem5::Named::_name, delta, fixedStats, genName, name(), owner, port, requestorId, retryPkt, trace, traceComplete, and gem5::TraceCPU::TraceCPU().

Member Function Documentation

◆ exit()

void gem5::TraceCPU::FixedRetryGen::exit ( )

Exit the FixedRetryGen.

Definition at line 1045 of file trace_cpu.cc.

References trace.

◆ init()

Tick gem5::TraceCPU::FixedRetryGen::init ( )

Called from TraceCPU init().

Reads the first message from the input trace file and returns the send tick.

Returns: Tick when first packet must be sent

Definition at line 983 of file trace_cpu.cc.

References currElement, DPRINTF, gem5::MaxTick, nextExecute(), and panic.

◆ isTraceComplete()

bool gem5::TraceCPU::FixedRetryGen::isTraceComplete ( )

inline

Returns the traceComplete variable which is set when end of the input trace file is reached.

Returns: bool true if traceComplete is set, false otherwise.

Definition at line 459 of file trace_cpu.hh.

References traceComplete.

◆ name()

const std::string & gem5::TraceCPU::FixedRetryGen::name ( ) const

inline

Returns name of the FixedRetryGen instance.

Definition at line 423 of file trace_cpu.hh.

References genName.

Referenced by FixedRetryGen().

◆ nextExecute()

bool gem5::TraceCPU::FixedRetryGen::nextExecute ( )

Reads a line of the trace file.

Returns the tick when the next request should be generated. If the end of the file has been reached, it returns false.

Returns: bool false id end of file has been reached

Definition at line 1051 of file trace_cpu.cc.

References currElement, gem5::curTick(), DPRINTF, fixedStats, trace, and traceComplete.

Referenced by init(), and tryNext().

◆ send()

bool gem5::TraceCPU::FixedRetryGen::send	(	Addr	addr,
		unsigned	size,
		const MemCmd &	cmd,
		Request::FlagsType	flags,
		Addr	pc )

Creates a new request assigning the request parameters passed by the arguments.

Calls the port's sendTimingReq() and returns true if the packet was sent succesfully. It is called by tryNext()

Parameters

addr	address of request
size	size of request
cmd	if it is a read or write request
flags	associated request flags
pc	instruction PC that generated the request

Returns: true if packet was sent successfully

Definition at line 1082 of file trace_cpu.cc.

References gem5::X86ISA::addr, gem5::Packet::dataDynamic(), gem5::MemCmd::isWrite(), gem5::MipsISA::pc, port, requestorId, and retryPkt.

Referenced by tryNext().

◆ tickDelta()

int64_t gem5::TraceCPU::FixedRetryGen::tickDelta ( )

inline

Definition at line 461 of file trace_cpu.hh.

References delta.

◆ tryNext()

bool gem5::TraceCPU::FixedRetryGen::tryNext ( )

This tries to send current or retry packet and returns true if successfull.

It calls nextExecute() to read next message.

Returns: bool true if packet is sent successfully

Definition at line 998 of file trace_cpu.cc.

References currElement, delta, DPRINTF, fixedStats, nextExecute(), port, retryPkt, send(), and traceComplete.

Member Data Documentation

◆ currElement

TraceElement gem5::TraceCPU::FixedRetryGen::currElement

private

Store an element read from the trace to send as the next packet.

Definition at line 495 of file trace_cpu.hh.

Referenced by init(), nextExecute(), and tryNext().

◆ delta

int64_t gem5::TraceCPU::FixedRetryGen::delta

private

Stores the difference in the send ticks of the current and last packets.

Keeping this signed to check overflow to a negative value which will be caught by assert(delta > 0)

Definition at line 487 of file trace_cpu.hh.

Referenced by FixedRetryGen(), tickDelta(), and tryNext().

◆ fixedStats

gem5::TraceCPU::FixedRetryGen::FixedRetryGenStatGroup gem5::TraceCPU::FixedRetryGen::fixedStats

protected

Referenced by FixedRetryGen(), nextExecute(), and tryNext().

◆ genName

std::string gem5::TraceCPU::FixedRetryGen::genName

private

String to store the name of the FixedRetryGen.

Definition at line 477 of file trace_cpu.hh.

Referenced by FixedRetryGen(), and name().

◆ owner

TraceCPU& gem5::TraceCPU::FixedRetryGen::owner

private

Reference of the TraceCPU.

Definition at line 465 of file trace_cpu.hh.

Referenced by FixedRetryGen().

◆ port

RequestPort& gem5::TraceCPU::FixedRetryGen::port

private

Reference of the port to be used to issue memory requests.

Definition at line 468 of file trace_cpu.hh.

Referenced by FixedRetryGen(), send(), and tryNext().

◆ requestorId

const RequestorID gem5::TraceCPU::FixedRetryGen::requestorId

private

RequestorID used for the requests being sent.

Definition at line 471 of file trace_cpu.hh.

Referenced by FixedRetryGen(), and send().

◆ retryPkt

PacketPtr gem5::TraceCPU::FixedRetryGen::retryPkt

private

PacketPtr used to store the packet to retry.

Definition at line 480 of file trace_cpu.hh.

Referenced by FixedRetryGen(), send(), and tryNext().

◆ trace

InputStream gem5::TraceCPU::FixedRetryGen::trace

private

Input stream used for reading the input trace file.

Definition at line 474 of file trace_cpu.hh.

Referenced by exit(), FixedRetryGen(), and nextExecute().

◆ traceComplete

bool gem5::TraceCPU::FixedRetryGen::traceComplete

private

Set to true when end of trace is reached.

Definition at line 492 of file trace_cpu.hh.

Referenced by FixedRetryGen(), isTraceComplete(), nextExecute(), and tryNext().

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

cpu/trace/trace_cpu.hh
cpu/trace/trace_cpu.cc

Classes

Public Member Functions

Protected Attributes

Private Attributes

Detailed Description

Constructor & Destructor Documentation

◆ FixedRetryGen()

Member Function Documentation

◆ exit()

◆ init()

◆ isTraceComplete()

◆ name()

◆ nextExecute()

◆ send()

◆ tickDelta()

◆ tryNext()

Member Data Documentation

◆ currElement

◆ delta

◆ fixedStats

◆ genName

◆ owner

◆ port

◆ requestorId

◆ retryPkt

◆ trace

◆ traceComplete