gem5  v21.1.0.2
Classes | Public Member Functions | Protected Attributes | Private Attributes | List of all members
gem5::TraceCPU::FixedRetryGen Class Reference

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(). More...
 
bool tryNext ()
 This tries to send current or retry packet and returns true if successfull. More...
 
const std::string & name () const
 Returns name of the FixedRetryGen instance. More...
 
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. More...
 
void exit ()
 Exit the FixedRetryGen. More...
 
bool nextExecute ()
 Reads a line of the trace file. More...
 
bool isTraceComplete ()
 Returns the traceComplete variable which is set when end of the input trace file is reached. More...
 
int64_t tickDelta ()
 

Protected Attributes

gem5::TraceCPU::FixedRetryGen::FixedRetryGenStatGroup fixedStats
 

Private Attributes

TraceCPUowner
 Reference of the TraceCPU. More...
 
RequestPortport
 Reference of the port to be used to issue memory requests. More...
 
const RequestorID requestorId
 RequestorID used for the requests being sent. More...
 
InputStream trace
 Input stream used for reading the input trace file. More...
 
std::string genName
 String to store the name of the FixedRetryGen. More...
 
PacketPtr retryPkt
 PacketPtr used to store the packet to retry. More...
 
int64_t delta
 Stores the difference in the send ticks of the current and last packets. More...
 
bool traceComplete
 Set to true when end of trace is reached. More...
 
TraceElement currElement
 Store an element read from the trace to send as the next packet. More...
 

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 327 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 407 of file trace_cpu.hh.

Member Function Documentation

◆ exit()

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

Exit the FixedRetryGen.

Definition at line 1051 of file trace_cpu.cc.

References gem5::TraceCPU::FixedRetryGen::InputStream::reset(), and 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 989 of file trace_cpu.cc.

References currElement, DPRINTF, gem5::MaxTick, nextExecute(), panic, and gem5::TraceCPU::FixedRetryGen::TraceElement::tick.

Referenced by gem5::TraceCPU::init().

◆ 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 474 of file trace_cpu.hh.

References traceComplete.

Referenced by gem5::TraceCPU::schedIcacheNext().

◆ name()

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

Returns name of the FixedRetryGen instance.

Definition at line 438 of file trace_cpu.hh.

References genName.

◆ nextExecute()

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

◆ 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
addraddress of request
sizesize of request
cmdif it is a read or write request
flagsassociated request flags
pcinstruction PC that generated the request
Returns
true if packet was sent successfully

Definition at line 1088 of file trace_cpu.cc.

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

Referenced by tryNext().

◆ tickDelta()

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

Definition at line 476 of file trace_cpu.hh.

References delta.

Referenced by gem5::TraceCPU::schedIcacheNext().

◆ tryNext()

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

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 510 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 502 of file trace_cpu.hh.

Referenced by tickDelta(), and tryNext().

◆ fixedStats

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

Referenced by nextExecute(), and tryNext().

◆ genName

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

String to store the name of the FixedRetryGen.

Definition at line 492 of file trace_cpu.hh.

Referenced by name().

◆ owner

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

◆ port

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

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

Definition at line 483 of file trace_cpu.hh.

Referenced by send(), and tryNext().

◆ requestorId

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

RequestorID used for the requests being sent.

Definition at line 486 of file trace_cpu.hh.

Referenced by send().

◆ retryPkt

PacketPtr gem5::TraceCPU::FixedRetryGen::retryPkt
private

PacketPtr used to store the packet to retry.

Definition at line 495 of file trace_cpu.hh.

Referenced by send(), and tryNext().

◆ trace

InputStream gem5::TraceCPU::FixedRetryGen::trace
private

Input stream used for reading the input trace file.

Definition at line 489 of file trace_cpu.hh.

Referenced by exit(), nextExecute(), gem5::TraceCPU::FixedRetryGen::InputStream::read(), and gem5::TraceCPU::FixedRetryGen::InputStream::reset().

◆ traceComplete

bool gem5::TraceCPU::FixedRetryGen::traceComplete
private

Set to true when end of trace is reached.

Definition at line 507 of file trace_cpu.hh.

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


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

Generated on Tue Sep 21 2021 12:28:19 for gem5 by doxygen 1.8.17