gem5  v22.1.0.0
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gem5::ScheduleStage Class Reference

#include <schedule_stage.hh>

Classes

struct  ScheduleStageStats
 

Public Types

enum  SchNonRdyType {
  SCH_SCALAR_ALU_NRDY , SCH_VECTOR_ALU_NRDY , SCH_VECTOR_MEM_ISSUE_NRDY , SCH_VECTOR_MEM_BUS_BUSY_NRDY ,
  SCH_VECTOR_MEM_COALESCER_NRDY , SCH_VECTOR_MEM_REQS_NRDY , SCH_CEDE_SIMD_NRDY , SCH_SCALAR_MEM_ISSUE_NRDY ,
  SCH_SCALAR_MEM_BUS_BUSY_NRDY , SCH_SCALAR_MEM_FIFO_NRDY , SCH_LOCAL_MEM_ISSUE_NRDY , SCH_LOCAL_MEM_BUS_BUSY_NRDY ,
  SCH_LOCAL_MEM_FIFO_NRDY , SCH_FLAT_MEM_ISSUE_NRDY , SCH_FLAT_MEM_BUS_BUSY_NRDY , SCH_FLAT_MEM_COALESCER_NRDY ,
  SCH_FLAT_MEM_REQS_NRDY , SCH_FLAT_MEM_FIFO_NRDY , SCH_RDY , SCH_NRDY_CONDITIONS
}
 
enum  schopdnonrdytype_e { SCH_VRF_OPD_NRDY , SCH_SRF_OPD_NRDY , SCH_RF_OPD_NRDY , SCH_RF_OPD_NRDY_CONDITIONS }
 
enum  schrfaccessnonrdytype_e {
  SCH_VRF_RD_ACCESS_NRDY , SCH_VRF_WR_ACCESS_NRDY , SCH_SRF_RD_ACCESS_NRDY , SCH_SRF_WR_ACCESS_NRDY ,
  SCH_RF_ACCESS_NRDY , SCH_RF_ACCESS_NRDY_CONDITIONS
}
 
enum  SCH_STATUS { RFBUSY = 0 , RFREADY }
 

Public Member Functions

 ScheduleStage (const ComputeUnitParams &p, ComputeUnit &cu, ScoreboardCheckToSchedule &from_scoreboard_check, ScheduleToExecute &to_execute)
 
 ~ScheduleStage ()
 
void init ()
 
void exec ()
 
const std::string & name () const
 
void deleteFromSch (Wavefront *w)
 

Protected Attributes

gem5::ScheduleStage::ScheduleStageStats stats
 

Private Member Functions

bool addToSchList (int exeType, const GPUDynInstPtr &gpu_dyn_inst)
 
void reinsertToSchList (int exeType, const GPUDynInstPtr &gpu_dyn_inst)
 
void checkRfOperandReadComplete ()
 
void checkMemResources ()
 
bool dispatchReady (const GPUDynInstPtr &gpu_dyn_inst)
 
void fillDispatchList ()
 
void arbitrateVrfToLdsBus ()
 
void scheduleRfDestOperands ()
 
bool schedRfWrites (int exeType, const GPUDynInstPtr &gpu_dyn_inst)
 
void reserveResources ()
 
void doDispatchListTransition (int unitId, DISPATCH_STATUS s, const GPUDynInstPtr &gpu_dyn_inst)
 
void doDispatchListTransition (int unitId, DISPATCH_STATUS s)
 

Private Attributes

ComputeUnit & computeUnit
 
ScoreboardCheckToSchedule & fromScoreboardCheck
 
ScheduleToExecute & toExecute
 
std::vector< Scheduler > scheduler
 
const std::string _name
 
bool vectorAluRdy
 
bool scalarAluRdy
 
bool scalarMemBusRdy
 
bool scalarMemIssueRdy
 
bool glbMemBusRdy
 
bool glbMemIssueRdy
 
bool locMemBusRdy
 
bool locMemIssueRdy
 
std::unordered_set< uint64_t > wavesInSch
 
std::vector< std::deque< std::pair< GPUDynInstPtr, SCH_STATUS > > > schList
 

Detailed Description

Definition at line 62 of file schedule_stage.hh.

Member Enumeration Documentation

◆ SCH_STATUS

enum gem5::ScheduleStage::SCH_STATUS
Enumerator
RFBUSY 
RFREADY 

Definition at line 118 of file schedule_stage.hh.

◆ SchNonRdyType

enum gem5::ScheduleStage::SchNonRdyType
Enumerator
SCH_SCALAR_ALU_NRDY 
SCH_VECTOR_ALU_NRDY 
SCH_VECTOR_MEM_ISSUE_NRDY 
SCH_VECTOR_MEM_BUS_BUSY_NRDY 
SCH_VECTOR_MEM_COALESCER_NRDY 
SCH_VECTOR_MEM_REQS_NRDY 
SCH_CEDE_SIMD_NRDY 
SCH_SCALAR_MEM_ISSUE_NRDY 
SCH_SCALAR_MEM_BUS_BUSY_NRDY 
SCH_SCALAR_MEM_FIFO_NRDY 
SCH_LOCAL_MEM_ISSUE_NRDY 
SCH_LOCAL_MEM_BUS_BUSY_NRDY 
SCH_LOCAL_MEM_FIFO_NRDY 
SCH_FLAT_MEM_ISSUE_NRDY 
SCH_FLAT_MEM_BUS_BUSY_NRDY 
SCH_FLAT_MEM_COALESCER_NRDY 
SCH_FLAT_MEM_REQS_NRDY 
SCH_FLAT_MEM_FIFO_NRDY 
SCH_RDY 
SCH_NRDY_CONDITIONS 

Definition at line 74 of file schedule_stage.hh.

◆ schopdnonrdytype_e

enum gem5::ScheduleStage::schopdnonrdytype_e
Enumerator
SCH_VRF_OPD_NRDY 
SCH_SRF_OPD_NRDY 
SCH_RF_OPD_NRDY 
SCH_RF_OPD_NRDY_CONDITIONS 

Definition at line 97 of file schedule_stage.hh.

◆ schrfaccessnonrdytype_e

enum gem5::ScheduleStage::schrfaccessnonrdytype_e
Enumerator
SCH_VRF_RD_ACCESS_NRDY 
SCH_VRF_WR_ACCESS_NRDY 
SCH_SRF_RD_ACCESS_NRDY 
SCH_SRF_WR_ACCESS_NRDY 
SCH_RF_ACCESS_NRDY 
SCH_RF_ACCESS_NRDY_CONDITIONS 

Definition at line 104 of file schedule_stage.hh.

Constructor & Destructor Documentation

◆ ScheduleStage()

gem5::ScheduleStage::ScheduleStage ( const ComputeUnitParams &  p,
ComputeUnit &  cu,
ScoreboardCheckToSchedule &  from_scoreboard_check,
ScheduleToExecute &  to_execute 
)

Definition at line 48 of file schedule_stage.cc.

References gem5::MipsISA::dq, gem5::ArmISA::j, gem5::ComputeUnit::numExeUnits(), gem5::VegaISA::p, scheduler, schList, and wavesInSch.

◆ ~ScheduleStage()

gem5::ScheduleStage::~ScheduleStage ( )

Definition at line 68 of file schedule_stage.cc.

References scheduler, schList, and wavesInSch.

Member Function Documentation

◆ addToSchList()

bool gem5::ScheduleStage::addToSchList ( int  exeType,
const GPUDynInstPtr &  gpu_dyn_inst 
)
private

Definition at line 294 of file schedule_stage.cc.

References computeUnit, DPRINTF, gem5::Wavefront::hasBarrier(), gem5::ComputeUnit::insertInPipeMap(), gem5::Wavefront::isOldestInstBarrier(), gem5::Wavefront::isOldestInstSleep(), gem5::Wavefront::isOldestInstWaitcnt(), gem5::ScheduleStage::ScheduleStageStats::rfAccessStalls, RFBUSY, gem5::Wavefront::S_BARRIER, gem5::Wavefront::S_STALLED_SLEEP, gem5::Wavefront::S_WAITCNT, SCH_RF_ACCESS_NRDY, SCH_SRF_RD_ACCESS_NRDY, SCH_VRF_RD_ACCESS_NRDY, schList, gem5::Wavefront::WavefrontStats::schRfAccessStalls, gem5::Wavefront::WavefrontStats::schStalls, gem5::Wavefront::setStatus(), gem5::Wavefront::simdId, gem5::ComputeUnit::srf, stats, gem5::Wavefront::stats, gem5::ComputeUnit::vrf, wavesInSch, and gem5::Wavefront::wfDynId.

Referenced by exec().

◆ arbitrateVrfToLdsBus()

void gem5::ScheduleStage::arbitrateVrfToLdsBus ( )
private

Definition at line 625 of file schedule_stage.cc.

References computeUnit, gem5::ScheduleToExecute::dispatchStatus(), doDispatchListTransition(), DPRINTF, gem5::EXREADY, gem5::ComputeUnit::firstMemUnit(), gem5::ArmISA::i, gem5::ScheduleStage::ScheduleStageStats::ldsBusArbStalls, gem5::Wavefront::localMem, gem5::ComputeUnit::numVectorGlobalMemUnits, gem5::ScheduleToExecute::readyInst(), reinsertToSchList(), gem5::SKIP, stats, and toExecute.

Referenced by exec().

◆ checkMemResources()

void gem5::ScheduleStage::checkMemResources ( )
private

Definition at line 378 of file schedule_stage.cc.

References computeUnit, glbMemBusRdy, glbMemIssueRdy, locMemBusRdy, locMemIssueRdy, gem5::WaitClass::rdy(), scalarMemBusRdy, scalarMemIssueRdy, gem5::ComputeUnit::scalarMemUnit, gem5::ComputeUnit::srfToScalarMemPipeBus, gem5::ComputeUnit::vectorGlobalMemUnit, gem5::ComputeUnit::vectorSharedMemUnit, gem5::ComputeUnit::vrfToGlobalMemPipeBus, and gem5::ComputeUnit::vrfToLocalMemPipeBus.

Referenced by fillDispatchList().

◆ checkRfOperandReadComplete()

void gem5::ScheduleStage::checkRfOperandReadComplete ( )
private

Definition at line 666 of file schedule_stage.cc.

References computeUnit, DPRINTF, gem5::ArmISA::j, gem5::ComputeUnit::numExeUnits(), gem5::ScheduleStage::ScheduleStageStats::opdNrdyStalls, gem5::VegaISA::p, RFBUSY, RFREADY, SCH_RF_OPD_NRDY, SCH_SRF_OPD_NRDY, SCH_VRF_OPD_NRDY, gem5::Wavefront::WavefrontStats::schCycles, schList, gem5::Wavefront::WavefrontStats::schOpdNrdyStalls, gem5::Wavefront::WavefrontStats::schStalls, gem5::Wavefront::simdId, gem5::ComputeUnit::srf, stats, gem5::Wavefront::stats, gem5::ComputeUnit::vrf, and gem5::Wavefront::wfDynId.

Referenced by exec().

◆ deleteFromSch()

void gem5::ScheduleStage::deleteFromSch ( Wavefront *  w)

Definition at line 788 of file schedule_stage.cc.

References gem5::VegaISA::w, and wavesInSch.

◆ dispatchReady()

bool gem5::ScheduleStage::dispatchReady ( const GPUDynInstPtr &  gpu_dyn_inst)
private

Definition at line 416 of file schedule_stage.cc.

References gem5::GlobalMemPipeline::coalescerReady(), computeUnit, gem5::ScheduleStage::ScheduleStageStats::dispNrdyStalls, glbMemBusRdy, glbMemIssueRdy, gem5::ComputeUnit::globalMemoryPipe, gem5::ScalarMemPipeline::isGMReqFIFOWrRdy(), gem5::ComputeUnit::localMemoryPipe, locMemBusRdy, locMemIssueRdy, gem5::GlobalMemPipeline::outstandingReqsCheck(), panic, gem5::Wavefront::rdLmReqsInPipe, gem5::Wavefront::scalarAlu, scalarAluRdy, gem5::ComputeUnit::scalarALUs, scalarMemBusRdy, scalarMemIssueRdy, gem5::ComputeUnit::scalarMemoryPipe, gem5::Wavefront::scalarRdGmReqsInPipe, gem5::Wavefront::scalarWrGmReqsInPipe, SCH_FLAT_MEM_BUS_BUSY_NRDY, SCH_FLAT_MEM_COALESCER_NRDY, SCH_FLAT_MEM_FIFO_NRDY, SCH_FLAT_MEM_ISSUE_NRDY, SCH_FLAT_MEM_REQS_NRDY, SCH_LOCAL_MEM_BUS_BUSY_NRDY, SCH_LOCAL_MEM_FIFO_NRDY, SCH_LOCAL_MEM_ISSUE_NRDY, SCH_RDY, SCH_SCALAR_ALU_NRDY, SCH_SCALAR_MEM_BUS_BUSY_NRDY, SCH_SCALAR_MEM_FIFO_NRDY, SCH_SCALAR_MEM_ISSUE_NRDY, SCH_VECTOR_ALU_NRDY, SCH_VECTOR_MEM_BUS_BUSY_NRDY, SCH_VECTOR_MEM_COALESCER_NRDY, SCH_VECTOR_MEM_ISSUE_NRDY, SCH_VECTOR_MEM_REQS_NRDY, gem5::Wavefront::simdId, stats, vectorAluRdy, gem5::ComputeUnit::vectorALUs, and gem5::Wavefront::wrLmReqsInPipe.

Referenced by fillDispatchList().

◆ doDispatchListTransition() [1/2]

void gem5::ScheduleStage::doDispatchListTransition ( int  unitId,
DISPATCH_STATUS  s 
)
private

Definition at line 220 of file schedule_stage.cc.

References gem5::ScheduleToExecute::dispatchTransition(), gem5::VegaISA::s, and toExecute.

◆ doDispatchListTransition() [2/2]

void gem5::ScheduleStage::doDispatchListTransition ( int  unitId,
DISPATCH_STATUS  s,
const GPUDynInstPtr &  gpu_dyn_inst 
)
private

Definition at line 213 of file schedule_stage.cc.

References gem5::ScheduleToExecute::dispatchTransition(), gem5::VegaISA::s, and toExecute.

Referenced by arbitrateVrfToLdsBus(), fillDispatchList(), and scheduleRfDestOperands().

◆ exec()

void gem5::ScheduleStage::exec ( )

Remove any wave that already has an instruction present in SCH waiting for RF reads to complete. This prevents out of order execution within a wave.

Definition at line 90 of file schedule_stage.cc.

References addToSchList(), gem5::ScheduleStage::ScheduleStageStats::addToSchListStalls, arbitrateVrfToLdsBus(), checkRfOperandReadComplete(), computeUnit, fillDispatchList(), gem5::ComputeUnit::firstMemUnit(), fromScoreboardCheck, gem5::Wavefront::incExpInstsIssued(), gem5::Wavefront::incLGKMInstsIssued(), gem5::Wavefront::incVMemInstsIssued(), gem5::Wavefront::instructionBuffer, gem5::ArmISA::j, gem5::ComputeUnit::lastMemUnit(), gem5::ComputeUnit::numExeUnits(), gem5::ScheduleStage::ScheduleStageStats::rdyListEmpty, gem5::ScheduleStage::ScheduleStageStats::rdyListNotEmpty, gem5::ScoreboardCheckToSchedule::readyWFs(), reserveResources(), gem5::ScheduleToExecute::reset(), gem5::Wavefront::WavefrontStats::schCycles, scheduler, scheduleRfDestOperands(), stats, gem5::Wavefront::stats, toExecute, gem5::ScoreboardCheckToSchedule::updateReadyList(), and wavesInSch.

Referenced by gem5::ComputeUnit::exec().

◆ fillDispatchList()

void gem5::ScheduleStage::fillDispatchList ( )
private

Definition at line 556 of file schedule_stage.cc.

References gem5::GlobalMemPipeline::acqCoalescerToken(), checkMemResources(), computeUnit, dispatchReady(), gem5::ScheduleToExecute::dispatchStatus(), doDispatchListTransition(), DPRINTF, gem5::EMPTY, gem5::EXREADY, gem5::ComputeUnit::globalMemoryPipe, gem5::ArmISA::j, gem5::ArmISA::mp, gem5::ComputeUnit::numExeUnits(), RFREADY, schList, gem5::ScheduleStage::ScheduleStageStats::schListToDispList, gem5::ScheduleStage::ScheduleStageStats::schListToDispListStalls, stats, and toExecute.

Referenced by exec().

◆ init()

void gem5::ScheduleStage::init ( )

Definition at line 76 of file schedule_stage.cc.

References computeUnit, fatal_if, fromScoreboardCheck, gem5::ArmISA::j, gem5::ComputeUnit::numExeUnits(), gem5::ScoreboardCheckToSchedule::numReadyLists(), gem5::ComputeUnit::numVectorGlobalMemUnits, gem5::ComputeUnit::numVectorSharedMemUnits, gem5::ScoreboardCheckToSchedule::readyWFs(), and scheduler.

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

◆ name()

const std::string& gem5::ScheduleStage::name ( ) const
inline

Definition at line 73 of file schedule_stage.hh.

References _name.

◆ reinsertToSchList()

void gem5::ScheduleStage::reinsertToSchList ( int  exeType,
const GPUDynInstPtr &  gpu_dyn_inst 
)
private

Definition at line 362 of file schedule_stage.cc.

References RFREADY, and schList.

Referenced by arbitrateVrfToLdsBus(), and scheduleRfDestOperands().

◆ reserveResources()

void gem5::ScheduleStage::reserveResources ( )
private

Definition at line 722 of file schedule_stage.cc.

References computeUnit, gem5::ScheduleToExecute::dispatchStatus(), DPRINTF, gem5::EMPTY, gem5::EXREADY, gem5::Wavefront::globalMem, gem5::ArmISA::j, gem5::Wavefront::localMem, gem5::ComputeUnit::numExeUnits(), panic_if, gem5::ScheduleToExecute::readyInst(), gem5::Wavefront::reserveResources(), gem5::VegaISA::s, gem5::Wavefront::simdId, gem5::SKIP, gem5::ComputeUnit::srf, ss, toExecute, gem5::ComputeUnit::vrf, and gem5::Wavefront::wfDynId.

Referenced by exec().

◆ schedRfWrites()

bool gem5::ScheduleStage::schedRfWrites ( int  exeType,
const GPUDynInstPtr &  gpu_dyn_inst 
)
private

Definition at line 226 of file schedule_stage.cc.

References computeUnit, gem5::ScheduleStage::ScheduleStageStats::rfAccessStalls, SCH_RF_ACCESS_NRDY, SCH_SRF_WR_ACCESS_NRDY, SCH_VRF_WR_ACCESS_NRDY, gem5::Wavefront::WavefrontStats::schRfAccessStalls, gem5::Wavefront::WavefrontStats::schStalls, gem5::Wavefront::simdId, gem5::ComputeUnit::srf, stats, gem5::Wavefront::stats, and gem5::ComputeUnit::vrf.

Referenced by scheduleRfDestOperands().

◆ scheduleRfDestOperands()

void gem5::ScheduleStage::scheduleRfDestOperands ( )
private

Definition at line 262 of file schedule_stage.cc.

References computeUnit, gem5::ScheduleToExecute::dispatchStatus(), doDispatchListTransition(), gem5::EMPTY, gem5::Wavefront::instructionBuffer, gem5::ArmISA::j, gem5::Wavefront::localMem, gem5::ComputeUnit::numExeUnits(), gem5::ScheduleToExecute::readyInst(), reinsertToSchList(), schedRfWrites(), gem5::SKIP, and toExecute.

Referenced by exec().

Member Data Documentation

◆ _name

const std::string gem5::ScheduleStage::_name
private

Definition at line 133 of file schedule_stage.hh.

Referenced by name().

◆ computeUnit

ComputeUnit& gem5::ScheduleStage::computeUnit
private

Definition at line 125 of file schedule_stage.hh.

Referenced by addToSchList(), arbitrateVrfToLdsBus(), checkMemResources(), checkRfOperandReadComplete(), dispatchReady(), exec(), fillDispatchList(), init(), reserveResources(), schedRfWrites(), and scheduleRfDestOperands().

◆ fromScoreboardCheck

ScoreboardCheckToSchedule& gem5::ScheduleStage::fromScoreboardCheck
private

Definition at line 126 of file schedule_stage.hh.

Referenced by exec(), and init().

◆ glbMemBusRdy

bool gem5::ScheduleStage::glbMemBusRdy
private

Definition at line 147 of file schedule_stage.hh.

Referenced by checkMemResources(), and dispatchReady().

◆ glbMemIssueRdy

bool gem5::ScheduleStage::glbMemIssueRdy
private

Definition at line 148 of file schedule_stage.hh.

Referenced by checkMemResources(), and dispatchReady().

◆ locMemBusRdy

bool gem5::ScheduleStage::locMemBusRdy
private

Definition at line 149 of file schedule_stage.hh.

Referenced by checkMemResources(), and dispatchReady().

◆ locMemIssueRdy

bool gem5::ScheduleStage::locMemIssueRdy
private

Definition at line 150 of file schedule_stage.hh.

Referenced by checkMemResources(), and dispatchReady().

◆ scalarAluRdy

bool gem5::ScheduleStage::scalarAluRdy
private

Definition at line 144 of file schedule_stage.hh.

Referenced by dispatchReady().

◆ scalarMemBusRdy

bool gem5::ScheduleStage::scalarMemBusRdy
private

Definition at line 145 of file schedule_stage.hh.

Referenced by checkMemResources(), and dispatchReady().

◆ scalarMemIssueRdy

bool gem5::ScheduleStage::scalarMemIssueRdy
private

Definition at line 146 of file schedule_stage.hh.

Referenced by checkMemResources(), and dispatchReady().

◆ scheduler

std::vector<Scheduler> gem5::ScheduleStage::scheduler
private

Definition at line 131 of file schedule_stage.hh.

Referenced by exec(), init(), ScheduleStage(), and ~ScheduleStage().

◆ schList

std::vector<std::deque<std::pair<GPUDynInstPtr, SCH_STATUS> > > gem5::ScheduleStage::schList
private

Definition at line 185 of file schedule_stage.hh.

Referenced by addToSchList(), checkRfOperandReadComplete(), fillDispatchList(), reinsertToSchList(), ScheduleStage(), and ~ScheduleStage().

◆ stats

gem5::ScheduleStage::ScheduleStageStats gem5::ScheduleStage::stats
protected

Referenced by addToSchList(), arbitrateVrfToLdsBus(), checkRfOperandReadComplete(), dispatchReady(), exec(), fillDispatchList(), and schedRfWrites().

◆ toExecute

ScheduleToExecute& gem5::ScheduleStage::toExecute
private

Definition at line 127 of file schedule_stage.hh.

Referenced by arbitrateVrfToLdsBus(), doDispatchListTransition(), exec(), fillDispatchList(), reserveResources(), and scheduleRfDestOperands().

◆ vectorAluRdy

bool gem5::ScheduleStage::vectorAluRdy
private

Definition at line 143 of file schedule_stage.hh.

Referenced by dispatchReady().

◆ wavesInSch

std::unordered_set<uint64_t> gem5::ScheduleStage::wavesInSch
private

Definition at line 174 of file schedule_stage.hh.

Referenced by addToSchList(), deleteFromSch(), exec(), ScheduleStage(), and ~ScheduleStage().

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