gem5  v22.0.0.1
comm.cc
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31 
32 #include "gpu-compute/comm.hh"
33 
34 #include <cassert>
35 
36 #include "gpu-compute/wavefront.hh"
37 #include "params/ComputeUnit.hh"
38 
39 namespace gem5
40 {
41 
46  &p)
47 {
48  int num_func_units = p.num_SIMDs + p.num_scalar_cores
49  + p.num_global_mem_pipes + p.num_shared_mem_pipes
50  + p.num_scalar_mem_pipes;
51  _readyWFs.resize(num_func_units);
52 
53  for (auto &func_unit_wf_list : _readyWFs) {
54  func_unit_wf_list.reserve(p.n_wf);
55  }
56 }
57 
58 void
60 {
61  for (auto &func_unit_wf_list : _readyWFs) {
62  func_unit_wf_list.resize(0);
63  }
64 }
65 
66 void
68 {
69  _readyWFs[func_unit_id].push_back(wf);
70 }
71 
72 int
74 {
75  return _readyWFs.size();
76 }
77 
80 {
81  return _readyWFs[func_unit_id];
82 }
83 
88 void
90 {
91  std::vector<Wavefront*> &func_unit_wf_list = _readyWFs[func_unit_id];
92 
93  for (auto it = func_unit_wf_list.begin(); it != func_unit_wf_list.end();) {
94  if ((*it)->instructionBuffer.empty()) {
95  it = func_unit_wf_list.erase(it);
96  } else {
97  ++it;
98  }
99  }
100 }
101 
105 ScheduleToExecute::ScheduleToExecute(const ComputeUnitParams &p)
106 {
107  int num_func_units = p.num_SIMDs + p.num_scalar_cores
108  + p.num_global_mem_pipes + p.num_shared_mem_pipes
109  + p.num_scalar_mem_pipes;
110  _readyInsts.resize(num_func_units, nullptr);
111  _dispatchStatus.resize(num_func_units, EMPTY);
112 }
113 
114 void
116 {
117  for (auto &func_unit_ready_inst : _readyInsts) {
118  func_unit_ready_inst = nullptr;
119  }
120 
121  for (auto &func_unit_status : _dispatchStatus) {
122  func_unit_status = EMPTY;
123  }
124 }
125 
128 {
129  return _readyInsts[func_unit_id];
130 }
131 
132 void
134  int func_unit_id,
135  DISPATCH_STATUS disp_status)
136 {
137  _readyInsts[func_unit_id] = gpu_dyn_inst;
138  _dispatchStatus[func_unit_id] = disp_status;
139 }
140 
141 void
143  DISPATCH_STATUS disp_status)
144 {
145  _readyInsts[func_unit_id] = nullptr;
146  _dispatchStatus[func_unit_id] = disp_status;
147 }
148 
150 ScheduleToExecute::dispatchStatus(int func_unit_id) const
151 {
152  return _dispatchStatus[func_unit_id];
153 }
154 
155 } // namespace gem5
gem5::ScoreboardCheckToSchedule::markWFReady
void markWFReady(Wavefront *wf, int func_unit_id)
Mark the WF as ready for execution on a particular functional unit.
Definition: comm.cc:67
gem5::ScheduleToExecute::_readyInsts
std::vector< GPUDynInstPtr > _readyInsts
Definition: comm.hh:118
gem5::ScoreboardCheckToSchedule::updateReadyList
void updateReadyList(int func_unit_id)
Delete all wavefronts that have been marked as ready at scoreboard stage but are found to have empty ...
Definition: comm.cc:89
gem5::ScoreboardCheckToSchedule::ScoreboardCheckToSchedule
ScoreboardCheckToSchedule()=delete
comm.hh
gem5::Wavefront
Definition: wavefront.hh:60
gem5::ScheduleToExecute::dispatchStatus
DISPATCH_STATUS dispatchStatus(int func_unit_id) const
Definition: comm.cc:150
std::vector
STL vector class.
Definition: stl.hh:37
gem5::ScheduleToExecute::ScheduleToExecute
ScheduleToExecute()=delete
wavefront.hh
gem5::ScoreboardCheckToSchedule::reset
void reset() override
Reset the pipe stage interface.
Definition: comm.cc:59
gem5::ScheduleToExecute::readyInst
GPUDynInstPtr & readyInst(int func_unit_id)
Definition: comm.cc:127
gem5::VegaISA::p
Bitfield< 54 > p
Definition: pagetable.hh:70
gem5::EMPTY
@ EMPTY
Definition: exec_stage.hh:61
gem5::ScheduleToExecute::reset
void reset() override
Reset the pipe stage interface.
Definition: comm.cc:115
gem5::DISPATCH_STATUS
DISPATCH_STATUS
Definition: exec_stage.hh:59
gem5::ScheduleToExecute::_dispatchStatus
std::vector< DISPATCH_STATUS > _dispatchStatus
Definition: comm.hh:119
gem5::GPUDynInstPtr
std::shared_ptr< GPUDynInst > GPUDynInstPtr
Definition: misc.hh:49
gem5::ScoreboardCheckToSchedule::readyWFs
std::vector< Wavefront * > & readyWFs(int func_unit_id)
TODO: These methods expose this class' implementation too much by returning references to its interna...
Definition: comm.cc:79
gem5::ScheduleToExecute::dispatchTransition
void dispatchTransition(const GPUDynInstPtr &gpu_dyn_inst, int func_unit_id, DISPATCH_STATUS disp_status)
Once the scheduler has chosen a winning WF for execution, and after the WF's oldest instruction's ope...
Definition: comm.cc:133
gem5::ScoreboardCheckToSchedule::_readyWFs
std::vector< std::vector< Wavefront * > > _readyWFs
Definition: comm.hh:92
gem5
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
Definition: gpu_translation_state.hh:37
gem5::ScoreboardCheckToSchedule::numReadyLists
int numReadyLists() const
Returns the number of ready lists (i.e., the number of functional units).
Definition: comm.cc:73

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