gem5::ScoreboardCheckStage Class Reference

#include <scoreboard_check_stage.hh>

Classes
struct	ScoreboardCheckStageStats

Public Types
enum	nonrdytype_e {   NRDY_ILLEGAL , NRDY_WF_STOP , NRDY_IB_EMPTY , NRDY_WAIT_CNT ,   NRDY_SLEEP , NRDY_BARRIER_WAIT , NRDY_VGPR_NRDY , NRDY_SGPR_NRDY ,   INST_RDY , NRDY_CONDITIONS }

Public Member Functions
	ScoreboardCheckStage (const ComputeUnitParams &p, ComputeUnit &cu, ScoreboardCheckToSchedule &to_schedule)
	~ScoreboardCheckStage ()
void	exec ()
const std::string &	name () const

Protected Attributes
gem5::ScoreboardCheckStage::ScoreboardCheckStageStats	stats

Private Member Functions
void	collectStatistics (nonrdytype_e rdyStatus)
int	mapWaveToExeUnit (Wavefront *w)
bool	ready (Wavefront *w, nonrdytype_e *rdyStatus, int *exeResType, int wfSlot)

Private Attributes
ComputeUnit &	computeUnit
ScoreboardCheckToSchedule &	toSchedule
	Interface between scoreboard check and schedule stages.
const std::string	_name

Detailed Description

Definition at line 61 of file scoreboard_check_stage.hh.

Member Enumeration Documentation

nonrdytype_e

enum gem5::ScoreboardCheckStage::nonrdytype_e

Enumerator
NRDY_ILLEGAL
NRDY_WF_STOP
NRDY_IB_EMPTY
NRDY_WAIT_CNT
NRDY_SLEEP
NRDY_BARRIER_WAIT
NRDY_VGPR_NRDY
NRDY_SGPR_NRDY
INST_RDY
NRDY_CONDITIONS

Definition at line 64 of file scoreboard_check_stage.hh.

Constructor & Destructor Documentation

ScoreboardCheckStage()

gem5::ScoreboardCheckStage::ScoreboardCheckStage	(	const ComputeUnitParams &	p,
		ComputeUnit &	cu,
		ScoreboardCheckToSchedule &	to_schedule )

Definition at line 48 of file scoreboard_check_stage.cc.

~ScoreboardCheckStage()

gem5::ScoreboardCheckStage::~ScoreboardCheckStage

(

)

Definition at line 57 of file scoreboard_check_stage.cc.

Member Function Documentation

collectStatistics()

void gem5::ScoreboardCheckStage::collectStatistics ( nonrdytype_e rdyStatus )

private

Definition at line 62 of file scoreboard_check_stage.cc.

References NRDY_CONDITIONS, NRDY_ILLEGAL, panic_if, gem5::ScoreboardCheckStage::ScoreboardCheckStageStats::stallCycles, and stats.

Referenced by exec().

exec()

void gem5::ScoreboardCheckStage::exec

(

)

Reset the ready list for all execution units; ready list will be constructed every cycle because resource availability may change.

Definition at line 249 of file scoreboard_check_stage.cc.

References collectStatistics(), computeUnit, DPRINTF, gem5::ScoreboardCheckToSchedule::markWFReady(), gem5::Shader::n_wf, gem5::Wavefront::nextInstr(), NRDY_ILLEGAL, gem5::ComputeUnit::numVectorALUs, ready(), gem5::ScoreboardCheckToSchedule::reset(), gem5::ComputeUnit::shader, gem5::Wavefront::simdId, toSchedule, gem5::Wavefront::wfDynId, and gem5::ComputeUnit::wfList.

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

mapWaveToExeUnit()

int gem5::ScoreboardCheckStage::mapWaveToExeUnit ( Wavefront * w )

private

NOTE: Flat memory ops requires both GM and LM resources. The simulator models consumption of both GM and LM resources in the schedule stage. At instruction execution time, after the aperture check is performed, only the GM or LM pipe is actually reserved by the timing model. The GM unit is returned here since Flat ops occupy the GM slot in the ready and dispatch lists. They also consume the LM slot in the dispatch list.

Definition at line 207 of file scoreboard_check_stage.cc.

References computeUnit, gem5::ComputeUnit::numExeUnits(), panic, and gem5::MipsISA::w.

Referenced by ready().

name()

const std::string & gem5::ScoreboardCheckStage::name ( ) const

inline

Definition at line 84 of file scoreboard_check_stage.hh.

References _name.

ready()

bool gem5::ScoreboardCheckStage::ready ( Wavefront * w, nonrdytype_e * rdyStatus, int * exeResType, int wfSlot )

private

The waitCnt checks have to be done BEFORE checking for Instruction buffer empty condition. Otherwise, it will result into a deadlock if the last instruction in the Instruction buffer is a waitCnt: after executing the waitCnt, the Instruction buffer would be empty and the ready check logic will exit BEFORE checking for wait counters being satisfied.

Definition at line 75 of file scoreboard_check_stage.cc.

References gem5::ComputeUnit::allAtBarrier(), computeUnit, gem5::ComputeUnit::cu_id, DPRINTF, INST_RDY, mapWaveToExeUnit(), NRDY_BARRIER_WAIT, NRDY_IB_EMPTY, NRDY_SGPR_NRDY, NRDY_SLEEP, NRDY_VGPR_NRDY, NRDY_WAIT_CNT, NRDY_WF_STOP, panic, gem5::ComputeUnit::releaseWFsFromBarrier(), gem5::ComputeUnit::resetBarrier(), gem5::Wavefront::S_BARRIER, gem5::Wavefront::S_RETURNING, gem5::Wavefront::S_STALLED, gem5::Wavefront::S_STALLED_SLEEP, gem5::Wavefront::S_STOPPED, gem5::Wavefront::S_WAITCNT, gem5::ComputeUnit::srf, gem5::ComputeUnit::vrf, and gem5::MipsISA::w.

Referenced by exec().

Member Data Documentation

_name

const std::string gem5::ScoreboardCheckStage::_name

private

Definition at line 100 of file scoreboard_check_stage.hh.

Referenced by name().

computeUnit

ComputeUnit& gem5::ScoreboardCheckStage::computeUnit

private

Definition at line 91 of file scoreboard_check_stage.hh.

Referenced by exec(), mapWaveToExeUnit(), and ready().

stats

gem5::ScoreboardCheckStage::ScoreboardCheckStageStats gem5::ScoreboardCheckStage::stats

protected

Referenced by collectStatistics().

toSchedule

ScoreboardCheckToSchedule& gem5::ScoreboardCheckStage::toSchedule

private

Interface between scoreboard check and schedule stages.

Each cycle the scoreboard check stage populates this interface with information needed by the schedule stage.

Definition at line 98 of file scoreboard_check_stage.hh.

Referenced by exec().

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

• gpu-compute/scoreboard_check_stage.hh
• gpu-compute/scoreboard_check_stage.cc