diff options
Diffstat (limited to 'llvm/tools/llvm-mca/BackendStatistics.h')
| -rw-r--r-- | llvm/tools/llvm-mca/BackendStatistics.h | 56 |
1 files changed, 52 insertions, 4 deletions
diff --git a/llvm/tools/llvm-mca/BackendStatistics.h b/llvm/tools/llvm-mca/BackendStatistics.h index ac15ed2cbb2..7d79d2465d2 100644 --- a/llvm/tools/llvm-mca/BackendStatistics.h +++ b/llvm/tools/llvm-mca/BackendStatistics.h @@ -14,6 +14,20 @@ /// Example: /// ======== /// +/// Dynamic Dispatch Stall Cycles: +/// RAT - Register unavailable: 0 +/// RCU - Retire tokens unavailable: 0 +/// SCHEDQ - Scheduler full: 42 +/// LQ - Load queue full: 0 +/// SQ - Store queue full: 0 +/// GROUP - Static restrictions on the dispatch group: 0 +/// +/// +/// Register Alias Table: +/// Total number of mappings created: 210 +/// Max number of mappings used: 35 +/// +/// /// Dispatch Logic - number of cycles where we saw N instructions dispatched: /// [# dispatched], [# cycles] /// 0, 15 (11.5%) @@ -32,18 +46,28 @@ /// 2, 1 (0.8%) /// 4, 3 (2.3%) /// +/// +/// Scheduler's queue usage: +/// JALU01, 0/20 +/// JFPU01, 18/18 +/// JLSAGU, 0/12 +/// //===----------------------------------------------------------------------===// #ifndef LLVM_TOOLS_LLVM_MCA_BACKENDSTATISTICS_H #define LLVM_TOOLS_LLVM_MCA_BACKENDSTATISTICS_H -#include "HWEventListener.h" +#include "Backend.h" +#include "View.h" #include "llvm/Support/raw_ostream.h" #include <map> namespace mca { -class BackendStatistics : public HWEventListener { +class BackendStatistics : public View { + // TODO: remove the dependency from Backend. + const Backend &B; + using Histogram = std::map<unsigned, unsigned>; Histogram DispatchGroupSizePerCycle; Histogram RetiredPerCycle; @@ -67,8 +91,24 @@ class BackendStatistics : public HWEventListener { void printDispatchUnitStatistics(llvm::raw_ostream &OS) const; void printSchedulerStatistics(llvm::raw_ostream &OS) const; + void printDispatchStalls(llvm::raw_ostream &OS, unsigned RATStalls, + unsigned RCUStalls, unsigned SQStalls, + unsigned LDQStalls, unsigned STQStalls, + unsigned DGStalls) const; + void printRATStatistics(llvm::raw_ostream &OS, unsigned Mappings, + unsigned MaxUsedMappings) const; + void printRCUStatistics(llvm::raw_ostream &OS, const Histogram &Histogram, + unsigned Cycles) const; + void printDispatchUnitUsage(llvm::raw_ostream &OS, const Histogram &Stats, + unsigned Cycles) const; + void printIssuePerCycle(const Histogram &IssuePerCycle, + unsigned TotalCycles) const; + void printSchedulerUsage(llvm::raw_ostream &OS, const llvm::MCSchedModel &SM, + const llvm::ArrayRef<BufferUsageEntry> &Usage) const; + public: - BackendStatistics() : NumDispatched(0), NumIssued(0), NumRetired(0) {} + BackendStatistics(const Backend &backend) + : B(backend), NumDispatched(0), NumIssued(0), NumRetired(0) {} void onInstructionDispatched(unsigned Index) override { NumDispatched++; } void @@ -83,10 +123,18 @@ public: void onCycleEnd(unsigned Cycle) override { updateHistograms(); } - void printHistograms(llvm::raw_ostream &OS) { + void printView(llvm::raw_ostream &OS) const override { + printDispatchStalls(OS, B.getNumRATStalls(), B.getNumRCUStalls(), B.getNumSQStalls(), + B.getNumLDQStalls(), B.getNumSTQStalls(), B.getNumDispatchGroupStalls()); + printRATStatistics(OS, B.getTotalRegisterMappingsCreated(), + B.getMaxUsedRegisterMappings()); printDispatchUnitStatistics(OS); printSchedulerStatistics(OS); printRetireUnitStatistics(OS); + + std::vector<BufferUsageEntry> Usage; + B.getBuffersUsage(Usage); + printSchedulerUsage(OS, B.getSchedModel(), Usage); } }; |
