gem5  v21.1.0.2
strided_gen.cc
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37 
39 
40 #include <algorithm>
41 
42 #include "base/random.hh"
43 #include "base/trace.hh"
44 #include "debug/TrafficGen.hh"
45 
46 namespace gem5
47 {
48 
49 void
51 {
52  // reset the address and the data counter
54  dataManipulated = 0;
55 }
56 
59 {
60  // choose if we generate a read or a write here
61  bool isRead = readPercent != 0 &&
62  (readPercent == 100 || random_mt.random(0, 100) < readPercent);
63 
64  assert((readPercent == 0 && !isRead) || (readPercent == 100 && isRead) ||
65  readPercent != 100);
66 
67  DPRINTF(TrafficGen, "StridedGen::getNextPacket: %c to addr %x, size %d\n",
68  isRead ? 'r' : 'w', nextAddr, blocksize);
69 
70  // Add the amount of data manipulated to the total
72 
75 
76  // increment the address
78 
79  // If we have reached the end of the address space, reset the
80  // address to the start of the range
81  if (nextAddr > endAddr) {
82  DPRINTF(TrafficGen, "Wrapping address to the start of "
83  "the range\n");
85  }
86 
87  return pkt;
88 }
89 
90 Tick
91 StridedGen::nextPacketTick(bool elastic, Tick delay) const
92 {
93  // Check to see if we have reached the data limit. If dataLimit is
94  // zero we do not have a data limit and therefore we will keep
95  // generating requests for the entire residency in this state.
97  DPRINTF(TrafficGen, "Data limit for StridedGen reached.\n");
98  // there are no more requests, therefore return MaxTick
99  return MaxTick;
100  } else {
101  // return the time when the next request should take place
103 
104  // compensate for the delay experienced to not be elastic, by
105  // default the value we generate is from the time we are
106  // asked, so the elasticity happens automatically
107  if (!elastic) {
108  if (wait < delay)
109  wait = 0;
110  else
111  wait -= delay;
112  }
113 
114  return curTick() + wait;
115  }
116 }
117 
118 } // namespace gem5
gem5::curTick
Tick curTick()
The universal simulation clock.
Definition: cur_tick.hh:46
gem5::StochasticGen::minPeriod
const Tick minPeriod
Request generation period.
Definition: base_gen.hh:163
gem5::StridedGen::enter
void enter()
Enter this generator state.
Definition: strided_gen.cc:50
gem5::StridedGen::strideSize
Addr strideSize
Definition: strided_gen.hh:122
gem5::StochasticGen::blocksize
const Addr blocksize
Blocksize and address increment.
Definition: base_gen.hh:157
gem5::StridedGen::nextPacketTick
Tick nextPacketTick(bool elastic, Tick delay) const
Determine the tick when the next packet is available.
Definition: strided_gen.cc:91
random.hh
gem5::MaxTick
const Tick MaxTick
Definition: types.hh:60
gem5::StridedGen::nextAddr
Addr nextAddr
Address of next request.
Definition: strided_gen.hh:112
gem5::StridedGen::getNextPacket
PacketPtr getNextPacket()
Get the next generated packet.
Definition: strided_gen.cc:58
gem5::StridedGen::dataManipulated
Addr dataManipulated
Counter to determine the amount of data manipulated.
Definition: strided_gen.hh:119
gem5::BaseGen::getPacket
PacketPtr getPacket(Addr addr, unsigned size, const MemCmd &cmd, Request::FlagsType flags=0)
Generate a new request and associated packet.
Definition: base_gen.cc:55
gem5::StochasticGen::startAddr
const Addr startAddr
Start of address range.
Definition: base_gen.hh:151
gem5::Random::random
std::enable_if_t< std::is_integral< T >::value, T > random()
Use the SFINAE idiom to choose an implementation based on whether the type is integral or floating po...
Definition: random.hh:90
strided_gen.hh
gem5::StochasticGen::dataLimit
const Addr dataLimit
Maximum amount of data to manipulate.
Definition: base_gen.hh:172
DPRINTF
#define DPRINTF(x,...)
Definition: trace.hh:186
gem5::Packet
A Packet is used to encapsulate a transfer between two objects in the memory system (e....
Definition: packet.hh:283
gem5::Tick
uint64_t Tick
Tick count type.
Definition: types.hh:58
gem5::StochasticGen::endAddr
const Addr endAddr
End of address range.
Definition: base_gen.hh:154
gem5::MemCmd::ReadReq
@ ReadReq
Definition: packet.hh:86
gem5::StridedGen::genID
int genID
This param is used to indicate the order of a traffic generator among a set of traffic generators,...
Definition: strided_gen.hh:130
gem5::StochasticGen::maxPeriod
const Tick maxPeriod
Definition: base_gen.hh:164
sc_core::wait
void wait()
Definition: sc_module.cc:653
gem5::StochasticGen::readPercent
const uint8_t readPercent
Percent of generated transactions that should be reads.
Definition: base_gen.hh:169
gem5::TrafficGen
The traffic generator is a module that generates stimuli for the memory system, based on a collection...
Definition: traffic_gen.hh:70
gem5::MemCmd::WriteReq
@ WriteReq
Definition: packet.hh:89
trace.hh
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: decoder.cc:40
gem5::random_mt
Random random_mt
Definition: random.cc:99

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