The goal of this scheduling strategy is to maximize kernel occupancy (i.e. More...
#include "Target/AMDGPU/GCNSchedStrategy.h"
Inheritance diagram for llvm::GCNMaxOccupancySchedStrategy:
Collaboration diagram for llvm::GCNMaxOccupancySchedStrategy:
Public Member Functions | |
| GCNMaxOccupancySchedStrategy (const MachineSchedContext *C) | |
 Public Member Functions inherited from llvm::GCNSchedStrategy | |
| GCNSchedStrategy (const MachineSchedContext *C) | |
| SUnit * | pickNode (bool &IsTopNode) override |
| Pick the best node to balance the schedule. Implements MachineSchedStrategy. More... | |
| void | initialize (ScheduleDAGMI *DAG) override |
| Initialize the strategy after building the DAG for a new region. More... | |
| unsigned | getTargetOccupancy () |
| void | setTargetOccupancy (unsigned Occ) |
| GCNSchedStageID | getCurrentStage () |
| bool | advanceStage () |
| bool | hasNextStage () const |
| GCNSchedStageID | getNextStage () const |
| Public Member Functions inherited from llvm::GenericScheduler | |
| GenericScheduler (const MachineSchedContext *C) | |
| void | initPolicy (MachineBasicBlock::iterator Begin, MachineBasicBlock::iterator End, unsigned NumRegionInstrs) override |
| Initialize the per-region scheduling policy. More... | |
| void | dumpPolicy () const override |
| bool | shouldTrackPressure () const override |
| Check if pressure tracking is needed before building the DAG and initializing this strategy. More... | |
| bool | shouldTrackLaneMasks () const override |
| Returns true if lanemasks should be tracked. More... | |
| void | schedNode (SUnit *SU, bool IsTopNode) override |
| Update the scheduler's state after scheduling a node. More... | |
| void | releaseTopNode (SUnit *SU) override |
| When all predecessor dependencies have been resolved, free this node for top-down scheduling. More... | |
| void | releaseBottomNode (SUnit *SU) override |
| When all successor dependencies have been resolved, free this node for bottom-up scheduling. More... | |
| void | registerRoots () override |
| Notify this strategy that all roots have been released (including those that depend on EntrySU or ExitSU). More... | |
| Public Member Functions inherited from llvm::MachineSchedStrategy | |
| virtual | ~MachineSchedStrategy ()=default |
| virtual bool | doMBBSchedRegionsTopDown () const |
| virtual void | enterMBB (MachineBasicBlock *MBB) |
| Tell the strategy that MBB is about to be processed. More... | |
| virtual void | leaveMBB () |
| Tell the strategy that current MBB is done. More... | |
| virtual void | scheduleTree (unsigned SubtreeID) |
| Scheduler callback to notify that a new subtree is scheduled. More... | |
Additional Inherited Members | |
| Public Types inherited from llvm::GenericSchedulerBase | |
| enum | CandReason : uint8_t { NoCand, Only1, PhysReg, RegExcess, RegCritical, Stall, Cluster, Weak, RegMax, ResourceReduce, ResourceDemand, BotHeightReduce, BotPathReduce, TopDepthReduce, TopPathReduce, NextDefUse, NodeOrder } |
| Represent the type of SchedCandidate found within a single queue. More... | |
| Static Public Member Functions inherited from llvm::GenericSchedulerBase | |
| static const char * | getReasonStr (GenericSchedulerBase::CandReason Reason) |
| Public Attributes inherited from llvm::GCNSchedStrategy | |
| bool | HasHighPressure |
| bool | KnownExcessRP = false |
| unsigned | ErrorMargin = 3 |
| const unsigned | HighRPSGPRBias = 7 |
| const unsigned | HighRPVGPRBias = 7 |
| unsigned | SGPRCriticalLimit |
| unsigned | VGPRCriticalLimit |
| unsigned | SGPRLimitBias = 0 |
| unsigned | VGPRLimitBias = 0 |
| Protected Member Functions inherited from llvm::GCNSchedStrategy | |
| SUnit * | pickNodeBidirectional (bool &IsTopNode) |
| void | pickNodeFromQueue (SchedBoundary &Zone, const CandPolicy &ZonePolicy, const RegPressureTracker &RPTracker, SchedCandidate &Cand) |
| void | initCandidate (SchedCandidate &Cand, SUnit *SU, bool AtTop, const RegPressureTracker &RPTracker, const SIRegisterInfo *SRI, unsigned SGPRPressure, unsigned VGPRPressure) |
| Protected Member Functions inherited from llvm::GenericScheduler | |
| void | checkAcyclicLatency () |
| Set IsAcyclicLatencyLimited if the acyclic path is longer than the cyclic critical path by more cycles than it takes to drain the instruction buffer. More... | |
| void | initCandidate (SchedCandidate &Cand, SUnit *SU, bool AtTop, const RegPressureTracker &RPTracker, RegPressureTracker &TempTracker) |
| virtual bool | tryCandidate (SchedCandidate &Cand, SchedCandidate &TryCand, SchedBoundary *Zone) const |
| Apply a set of heuristics to a new candidate. More... | |
| SUnit * | pickNodeBidirectional (bool &IsTopNode) |
| Pick the best candidate node from either the top or bottom queue. More... | |
| void | pickNodeFromQueue (SchedBoundary &Zone, const CandPolicy &ZonePolicy, const RegPressureTracker &RPTracker, SchedCandidate &Candidate) |
| Pick the best candidate from the queue. More... | |
| void | reschedulePhysReg (SUnit *SU, bool isTop) |
| Protected Member Functions inherited from llvm::GenericSchedulerBase | |
| GenericSchedulerBase (const MachineSchedContext *C) | |
| void | setPolicy (CandPolicy &Policy, bool IsPostRA, SchedBoundary &CurrZone, SchedBoundary *OtherZone) |
| Set the CandPolicy given a scheduling zone given the current resources and latencies inside and outside the zone. More... | |
| void | traceCandidate (const SchedCandidate &Cand) |
| Protected Attributes inherited from llvm::GCNSchedStrategy | |
| std::vector< unsigned > | Pressure |
| std::vector< unsigned > | MaxPressure |
| unsigned | SGPRExcessLimit |
| unsigned | VGPRExcessLimit |
| unsigned | TargetOccupancy |
| MachineFunction * | MF |
| SmallVector< GCNSchedStageID, 4 > | SchedStages |
| SmallVectorImpl< GCNSchedStageID >::iterator | CurrentStage = nullptr |
| Protected Attributes inherited from llvm::GenericScheduler | |
| ScheduleDAGMILive * | DAG = nullptr |
| MachineSchedPolicy | RegionPolicy |
| SchedBoundary | Top |
| SchedBoundary | Bot |
| SchedCandidate | TopCand |
| Candidate last picked from Top boundary. More... | |
| SchedCandidate | BotCand |
| Candidate last picked from Bot boundary. More... | |
| Protected Attributes inherited from llvm::GenericSchedulerBase | |
| const MachineSchedContext * | Context |
| const TargetSchedModel * | SchedModel = nullptr |
| const TargetRegisterInfo * | TRI = nullptr |
| SchedRemainder | Rem |
Detailed Description
The goal of this scheduling strategy is to maximize kernel occupancy (i.e.
maximum number of waves per simd).
Definition at line 123 of file GCNSchedStrategy.h.
Constructor & Destructor Documentation
◆ GCNMaxOccupancySchedStrategy()
| GCNMaxOccupancySchedStrategy::GCNMaxOccupancySchedStrategy | ( | const MachineSchedContext * | C | ) |
Definition at line 369 of file GCNSchedStrategy.cpp.
References llvm::ClusteredLowOccupancyReschedule, llvm::OccInitialSchedule, llvm::PreRARematerialize, llvm::GCNSchedStrategy::SchedStages, and llvm::UnclusteredHighRPReschedule.
The documentation for this class was generated from the following files:
- lib/Target/AMDGPU/GCNSchedStrategy.h
- lib/Target/AMDGPU/GCNSchedStrategy.cpp
