gem5  v20.1.0.0
Public Types | Public Member Functions | Private Member Functions | Private Attributes | List of all members
ScheduleStage Class Reference

#include <schedule_stage.hh>

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 regStats ()
 
void deleteFromSch (Wavefront *w)
 

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
 
Stats::Vector rdyListEmpty
 
Stats::Vector rdyListNotEmpty
 
Stats::Vector addToSchListStalls
 
Stats::Vector schListToDispList
 
Stats::Vector schListToDispListStalls
 
Stats::Vector rfAccessStalls
 
Stats::Scalar ldsBusArbStalls
 
Stats::Vector opdNrdyStalls
 
Stats::Vector dispNrdyStalls
 
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 59 of file schedule_stage.hh.

Member Enumeration Documentation

◆ SCH_STATUS

enum ScheduleStage::SCH_STATUS
Enumerator
RFBUSY 
RFREADY 

Definition at line 114 of file schedule_stage.hh.

◆ SchNonRdyType

enum 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 71 of file schedule_stage.hh.

◆ schopdnonrdytype_e

enum ScheduleStage::schopdnonrdytype_e
Enumerator
SCH_VRF_OPD_NRDY 
SCH_SRF_OPD_NRDY 
SCH_RF_OPD_NRDY 
SCH_RF_OPD_NRDY_CONDITIONS 

Definition at line 93 of file schedule_stage.hh.

◆ schrfaccessnonrdytype_e

enum 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 99 of file schedule_stage.hh.

Constructor & Destructor Documentation

◆ ScheduleStage()

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

Definition at line 46 of file schedule_stage.cc.

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

◆ ~ScheduleStage()

ScheduleStage::~ScheduleStage ( )

Definition at line 66 of file schedule_stage.cc.

References scheduler, schList, and wavesInSch.

Member Function Documentation

◆ addToSchList()

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

Definition at line 289 of file schedule_stage.cc.

References computeUnit, DPRINTF, ComputeUnit::insertInPipeMap(), Wavefront::isOldestInstWaitcnt(), rfAccessStalls, RFBUSY, Wavefront::S_WAITCNT, SCH_RF_ACCESS_NRDY, SCH_SRF_RD_ACCESS_NRDY, SCH_VRF_RD_ACCESS_NRDY, schList, Wavefront::schRfAccessStalls, Wavefront::schStalls, Wavefront::setStatus(), Wavefront::simdId, ComputeUnit::srf, ComputeUnit::vrf, wavesInSch, and Wavefront::wfDynId.

Referenced by exec().

◆ arbitrateVrfToLdsBus()

void ScheduleStage::arbitrateVrfToLdsBus ( )
private

Definition at line 609 of file schedule_stage.cc.

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

Referenced by exec().

◆ checkMemResources()

void ScheduleStage::checkMemResources ( )
private

Definition at line 367 of file schedule_stage.cc.

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

Referenced by fillDispatchList().

◆ checkRfOperandReadComplete()

void ScheduleStage::checkRfOperandReadComplete ( )
private

Definition at line 650 of file schedule_stage.cc.

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

Referenced by exec().

◆ deleteFromSch()

void ScheduleStage::deleteFromSch ( Wavefront *  w)

Definition at line 772 of file schedule_stage.cc.

References MipsISA::w, and wavesInSch.

◆ dispatchReady()

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

Definition at line 405 of file schedule_stage.cc.

References GlobalMemPipeline::coalescerReady(), computeUnit, dispNrdyStalls, glbMemBusRdy, glbMemIssueRdy, ComputeUnit::globalMemoryPipe, ScalarMemPipeline::isGMReqFIFOWrRdy(), ComputeUnit::localMemoryPipe, locMemBusRdy, locMemIssueRdy, GlobalMemPipeline::outstandingReqsCheck(), panic, Wavefront::rdLmReqsInPipe, Wavefront::scalarAlu, scalarAluRdy, ComputeUnit::scalarALUs, scalarMemBusRdy, scalarMemIssueRdy, ComputeUnit::scalarMemoryPipe, Wavefront::scalarRdGmReqsInPipe, 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, Wavefront::simdId, vectorAluRdy, ComputeUnit::vectorALUs, and Wavefront::wrLmReqsInPipe.

Referenced by fillDispatchList().

◆ doDispatchListTransition() [1/2]

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

Definition at line 215 of file schedule_stage.cc.

References ScheduleToExecute::dispatchTransition(), ArmISA::s, and toExecute.

◆ doDispatchListTransition() [2/2]

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

Definition at line 208 of file schedule_stage.cc.

References ScheduleToExecute::dispatchTransition(), ArmISA::s, and toExecute.

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

◆ exec()

void 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 88 of file schedule_stage.cc.

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

Referenced by ComputeUnit::exec().

◆ fillDispatchList()

void ScheduleStage::fillDispatchList ( )
private

Definition at line 545 of file schedule_stage.cc.

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

Referenced by exec().

◆ init()

void ScheduleStage::init ( )

Definition at line 74 of file schedule_stage.cc.

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

Referenced by ComputeUnit::init().

◆ name()

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

Definition at line 70 of file schedule_stage.hh.

References _name.

Referenced by regStats().

◆ regStats()

void ScheduleStage::regStats ( )

Definition at line 778 of file schedule_stage.cc.

References addToSchListStalls, computeUnit, csprintf(), Stats::DataWrap< Derived, InfoProxyType >::desc(), dispNrdyStalls, Stats::VectorBase< Derived, Stor >::init(), ldsBusArbStalls, name(), Stats::DataWrap< Derived, InfoProxyType >::name(), ComputeUnit::numExeUnits(), opdNrdyStalls, rdyListEmpty, rdyListNotEmpty, rfAccessStalls, SCH_CEDE_SIMD_NRDY, SCH_FLAT_MEM_BUS_BUSY_NRDY, SCH_FLAT_MEM_COALESCER_NRDY, SCH_FLAT_MEM_FIFO_NRDY, SCH_FLAT_MEM_ISSUE_NRDY, SCH_LOCAL_MEM_BUS_BUSY_NRDY, SCH_LOCAL_MEM_FIFO_NRDY, SCH_LOCAL_MEM_ISSUE_NRDY, SCH_NRDY_CONDITIONS, SCH_RDY, SCH_RF_ACCESS_NRDY, SCH_RF_ACCESS_NRDY_CONDITIONS, SCH_RF_OPD_NRDY, SCH_RF_OPD_NRDY_CONDITIONS, SCH_SCALAR_ALU_NRDY, SCH_SCALAR_MEM_BUS_BUSY_NRDY, SCH_SCALAR_MEM_FIFO_NRDY, SCH_SCALAR_MEM_ISSUE_NRDY, SCH_SRF_OPD_NRDY, SCH_SRF_RD_ACCESS_NRDY, SCH_SRF_WR_ACCESS_NRDY, SCH_VECTOR_ALU_NRDY, SCH_VECTOR_MEM_BUS_BUSY_NRDY, SCH_VECTOR_MEM_COALESCER_NRDY, SCH_VECTOR_MEM_ISSUE_NRDY, SCH_VRF_OPD_NRDY, SCH_VRF_RD_ACCESS_NRDY, SCH_VRF_WR_ACCESS_NRDY, schListToDispList, schListToDispListStalls, and Stats::DataWrapVec< Derived, InfoProxyType >::subname().

Referenced by ComputeUnit::regStats().

◆ reinsertToSchList()

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

Definition at line 351 of file schedule_stage.cc.

References RFREADY, and schList.

Referenced by arbitrateVrfToLdsBus(), and scheduleRfDestOperands().

◆ reserveResources()

void ScheduleStage::reserveResources ( )
private

Definition at line 706 of file schedule_stage.cc.

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

Referenced by exec().

◆ schedRfWrites()

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

Definition at line 221 of file schedule_stage.cc.

References computeUnit, rfAccessStalls, SCH_RF_ACCESS_NRDY, SCH_SRF_WR_ACCESS_NRDY, SCH_VRF_WR_ACCESS_NRDY, Wavefront::schRfAccessStalls, Wavefront::schStalls, Wavefront::simdId, ComputeUnit::srf, and ComputeUnit::vrf.

Referenced by scheduleRfDestOperands().

◆ scheduleRfDestOperands()

void ScheduleStage::scheduleRfDestOperands ( )
private

Definition at line 257 of file schedule_stage.cc.

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

Referenced by exec().

Member Data Documentation

◆ _name

const std::string ScheduleStage::_name
private

Definition at line 171 of file schedule_stage.hh.

Referenced by name().

◆ addToSchListStalls

Stats::Vector ScheduleStage::addToSchListStalls
private

Definition at line 139 of file schedule_stage.hh.

Referenced by exec(), and regStats().

◆ computeUnit

ComputeUnit& ScheduleStage::computeUnit
private

Definition at line 121 of file schedule_stage.hh.

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

◆ dispNrdyStalls

Stats::Vector ScheduleStage::dispNrdyStalls
private

Definition at line 169 of file schedule_stage.hh.

Referenced by dispatchReady(), and regStats().

◆ fromScoreboardCheck

ScoreboardCheckToSchedule& ScheduleStage::fromScoreboardCheck
private

Definition at line 122 of file schedule_stage.hh.

Referenced by exec(), and init().

◆ glbMemBusRdy

bool ScheduleStage::glbMemBusRdy
private

Definition at line 185 of file schedule_stage.hh.

Referenced by checkMemResources(), and dispatchReady().

◆ glbMemIssueRdy

bool ScheduleStage::glbMemIssueRdy
private

Definition at line 186 of file schedule_stage.hh.

Referenced by checkMemResources(), and dispatchReady().

◆ ldsBusArbStalls

Stats::Scalar ScheduleStage::ldsBusArbStalls
private

Definition at line 160 of file schedule_stage.hh.

Referenced by arbitrateVrfToLdsBus(), and regStats().

◆ locMemBusRdy

bool ScheduleStage::locMemBusRdy
private

Definition at line 187 of file schedule_stage.hh.

Referenced by checkMemResources(), and dispatchReady().

◆ locMemIssueRdy

bool ScheduleStage::locMemIssueRdy
private

Definition at line 188 of file schedule_stage.hh.

Referenced by checkMemResources(), and dispatchReady().

◆ opdNrdyStalls

Stats::Vector ScheduleStage::opdNrdyStalls
private

Definition at line 164 of file schedule_stage.hh.

Referenced by checkRfOperandReadComplete(), and regStats().

◆ rdyListEmpty

Stats::Vector ScheduleStage::rdyListEmpty
private

Definition at line 133 of file schedule_stage.hh.

Referenced by exec(), and regStats().

◆ rdyListNotEmpty

Stats::Vector ScheduleStage::rdyListNotEmpty
private

Definition at line 134 of file schedule_stage.hh.

Referenced by exec(), and regStats().

◆ rfAccessStalls

Stats::Vector ScheduleStage::rfAccessStalls
private

Definition at line 155 of file schedule_stage.hh.

Referenced by addToSchList(), regStats(), and schedRfWrites().

◆ scalarAluRdy

bool ScheduleStage::scalarAluRdy
private

Definition at line 182 of file schedule_stage.hh.

Referenced by dispatchReady().

◆ scalarMemBusRdy

bool ScheduleStage::scalarMemBusRdy
private

Definition at line 183 of file schedule_stage.hh.

Referenced by checkMemResources(), and dispatchReady().

◆ scalarMemIssueRdy

bool ScheduleStage::scalarMemIssueRdy
private

Definition at line 184 of file schedule_stage.hh.

Referenced by checkMemResources(), and dispatchReady().

◆ scheduler

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

Definition at line 127 of file schedule_stage.hh.

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

◆ schList

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

Definition at line 223 of file schedule_stage.hh.

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

◆ schListToDispList

Stats::Vector ScheduleStage::schListToDispList
private

Definition at line 144 of file schedule_stage.hh.

Referenced by fillDispatchList(), and regStats().

◆ schListToDispListStalls

Stats::Vector ScheduleStage::schListToDispListStalls
private

Definition at line 148 of file schedule_stage.hh.

Referenced by fillDispatchList(), and regStats().

◆ toExecute

ScheduleToExecute& ScheduleStage::toExecute
private

Definition at line 123 of file schedule_stage.hh.

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

◆ vectorAluRdy

bool ScheduleStage::vectorAluRdy
private

Definition at line 181 of file schedule_stage.hh.

Referenced by dispatchReady().

◆ wavesInSch

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

Definition at line 212 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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