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09f6560512
This is useful to set the baseline model for an unknown CPU. Fixes PR50013. Differential Revision: https://reviews.llvm.org/D100743
131 lines
4.5 KiB
C++
131 lines
4.5 KiB
C++
//===-- Analysis.h ----------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// Analysis output for benchmark results.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLVM_EXEGESIS_ANALYSIS_H
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#define LLVM_TOOLS_LLVM_EXEGESIS_ANALYSIS_H
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#include "Clustering.h"
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#include "SchedClassResolution.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCDisassembler/MCDisassembler.h"
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#include "llvm/MC/MCInstPrinter.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/TargetRegistry.h"
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#include "llvm/Support/raw_ostream.h"
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#include <memory>
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#include <set>
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#include <string>
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#include <unordered_map>
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namespace llvm {
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namespace exegesis {
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// A helper class to analyze benchmark results for a target.
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class Analysis {
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public:
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Analysis(const Target &Target, std::unique_ptr<MCInstrInfo> InstrInfo,
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const InstructionBenchmarkClustering &Clustering,
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double AnalysisInconsistencyEpsilon,
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bool AnalysisDisplayUnstableOpcodes,
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const std::string &ForceCpuName = "");
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// Prints a csv of instructions for each cluster.
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struct PrintClusters {};
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// Find potential errors in the scheduling information given measurements.
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struct PrintSchedClassInconsistencies {};
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template <typename Pass> Error run(raw_ostream &OS) const;
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private:
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using ClusterId = InstructionBenchmarkClustering::ClusterId;
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// Represents the intersection of a sched class and a cluster.
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class SchedClassCluster {
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public:
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const InstructionBenchmarkClustering::ClusterId &id() const {
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return ClusterId;
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}
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const std::vector<size_t> &getPointIds() const { return PointIds; }
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void addPoint(size_t PointId,
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const InstructionBenchmarkClustering &Clustering);
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// Return the cluster centroid.
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const SchedClassClusterCentroid &getCentroid() const { return Centroid; }
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// Returns true if the cluster representative measurements match that of SC.
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bool
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measurementsMatch(const MCSubtargetInfo &STI, const ResolvedSchedClass &SC,
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const InstructionBenchmarkClustering &Clustering,
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const double AnalysisInconsistencyEpsilonSquared_) const;
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private:
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InstructionBenchmarkClustering::ClusterId ClusterId;
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std::vector<size_t> PointIds;
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// Measurement stats for the points in the SchedClassCluster.
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SchedClassClusterCentroid Centroid;
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};
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void printInstructionRowCsv(size_t PointId, raw_ostream &OS) const;
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void printClusterRawHtml(const InstructionBenchmarkClustering::ClusterId &Id,
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StringRef display_name, llvm::raw_ostream &OS) const;
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void printPointHtml(const InstructionBenchmark &Point,
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llvm::raw_ostream &OS) const;
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void
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printSchedClassClustersHtml(const std::vector<SchedClassCluster> &Clusters,
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const ResolvedSchedClass &SC,
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raw_ostream &OS) const;
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void printSchedClassDescHtml(const ResolvedSchedClass &SC,
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raw_ostream &OS) const;
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// A pair of (Sched Class, indices of points that belong to the sched
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// class).
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struct ResolvedSchedClassAndPoints {
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explicit ResolvedSchedClassAndPoints(ResolvedSchedClass &&RSC);
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ResolvedSchedClass RSC;
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std::vector<size_t> PointIds;
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};
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// Builds a list of ResolvedSchedClassAndPoints.
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std::vector<ResolvedSchedClassAndPoints> makePointsPerSchedClass() const;
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template <typename EscapeTag, EscapeTag Tag>
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void writeSnippet(raw_ostream &OS, ArrayRef<uint8_t> Bytes,
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const char *Separator) const;
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const InstructionBenchmarkClustering &Clustering_;
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MCObjectFileInfo ObjectFileInfo_;
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std::unique_ptr<MCContext> Context_;
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std::unique_ptr<MCSubtargetInfo> SubtargetInfo_;
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std::unique_ptr<MCInstrInfo> InstrInfo_;
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std::unique_ptr<MCRegisterInfo> RegInfo_;
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std::unique_ptr<MCAsmInfo> AsmInfo_;
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std::unique_ptr<MCInstPrinter> InstPrinter_;
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std::unique_ptr<MCDisassembler> Disasm_;
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const double AnalysisInconsistencyEpsilonSquared_;
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const bool AnalysisDisplayUnstableOpcodes_;
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};
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} // namespace exegesis
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} // namespace llvm
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#endif // LLVM_TOOLS_LLVM_EXEGESIS_CLUSTERING_H
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