gem5  v21.1.0.2
Public Member Functions | Protected Attributes | List of all members
gem5::RandomGen Class Reference

The random generator is similar to the linear one, but does not generate sequential addresses. More...

#include <random_gen.hh>

Inheritance diagram for gem5::RandomGen:
gem5::StochasticGen gem5::BaseGen gem5::DramGen gem5::NvmGen gem5::DramRotGen

Public Member Functions

 RandomGen (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 random address sequence generator. More...
 
void enter ()
 Enter this generator state. More...
 
PacketPtr getNextPacket ()
 Get the next generated packet. More...
 
Tick nextPacketTick (bool elastic, Tick delay) const
 Determine the tick when the next packet is available. More...
 
- 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. More...
 
virtual ~BaseGen ()
 
std::string name () const
 Get the name, useful for DPRINTFs. More...
 
virtual void exit ()
 Exit this generator state. More...
 

Protected Attributes

Addr dataManipulated
 Counter to determine the amount of data manipulated. More...
 
- Protected Attributes inherited from gem5::StochasticGen
const Addr startAddr
 Start of address range. More...
 
const Addr endAddr
 End of address range. More...
 
const Addr blocksize
 Blocksize and address increment. More...
 
const Addr cacheLineSize
 Cache line size in the simulated system. More...
 
const Tick minPeriod
 Request generation period. More...
 
const Tick maxPeriod
 
const uint8_t readPercent
 Percent of generated transactions that should be reads. More...
 
const Addr dataLimit
 Maximum amount of data to manipulate. More...
 
- Protected Attributes inherited from gem5::BaseGen
const std::string _name
 Name to use for status and debug printing. More...
 
const RequestorID requestorId
 The RequestorID used for generating requests. More...
 

Additional Inherited Members

- Public Attributes inherited from gem5::BaseGen
const Tick duration
 Time to spend in this state. More...
 
- 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. More...
 

Detailed Description

The random generator is similar to the linear one, but does not generate sequential addresses.

Instead it randomly picks an address in the range, aligned to the block size.

Definition at line 60 of file random_gen.hh.

Constructor & Destructor Documentation

◆ RandomGen()

gem5::RandomGen::RandomGen ( 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 random address sequence generator.

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

Parameters
genTraffic generator owning this sequence generator
_durationduration of this state before transitioning
requestor_idRequestorID related to the memory requests
start_addrStart address
end_addrEnd address
_blocksizeSize used for transactions injected
cacheline_sizecache line size in the system
min_periodLower limit of random inter-transaction time
max_periodUpper limit of random inter-transaction time
read_percentPercent of transactions that are reads
data_limitUpper limit on how much data to read/write

Definition at line 82 of file random_gen.hh.

Member Function Documentation

◆ enter()

void gem5::RandomGen::enter ( )
virtual

Enter this generator state.

Implements gem5::BaseGen.

Definition at line 50 of file random_gen.cc.

References dataManipulated.

◆ getNextPacket()

PacketPtr gem5::RandomGen::getNextPacket ( )
virtual

◆ nextPacketTick()

Tick gem5::RandomGen::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
elasticshould the injection respond to flow control or not
delaytime the previous packet spent waiting
Returns
next tick when a packet is available

Implements gem5::BaseGen.

Definition at line 84 of file random_gen.cc.

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

Member Data Documentation

◆ dataManipulated

Addr gem5::RandomGen::dataManipulated
protected

Counter to determine the amount of data manipulated.

Used to determine if we should continue generating requests.

Definition at line 106 of file random_gen.hh.

Referenced by enter(), getNextPacket(), gem5::DramGen::getNextPacket(), gem5::NvmGen::getNextPacket(), gem5::DramRotGen::getNextPacket(), and nextPacketTick().


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

Generated on Tue Sep 21 2021 12:28:00 for gem5 by doxygen 1.8.17