114 lines
4.4 KiB
C++
114 lines
4.4 KiB
C++
//===--------------------- SummaryView.cpp ----------------------*- 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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/// \file
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///
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/// This file implements the functionalities used by the SummaryView to print
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/// the report information.
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///
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//===----------------------------------------------------------------------===//
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#include "Views/SummaryView.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/MCA/Support.h"
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#include "llvm/Support/Format.h"
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namespace llvm {
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namespace mca {
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#define DEBUG_TYPE "llvm-mca"
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SummaryView::SummaryView(const MCSchedModel &Model, ArrayRef<MCInst> S,
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unsigned Width)
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: SM(Model), Source(S), DispatchWidth(Width ? Width : Model.IssueWidth),
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LastInstructionIdx(0), TotalCycles(0), NumMicroOps(0),
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ProcResourceUsage(Model.getNumProcResourceKinds(), 0),
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ProcResourceMasks(Model.getNumProcResourceKinds()),
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ResIdx2ProcResID(Model.getNumProcResourceKinds(), 0) {
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computeProcResourceMasks(SM, ProcResourceMasks);
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for (unsigned I = 1, E = SM.getNumProcResourceKinds(); I < E; ++I) {
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unsigned Index = getResourceStateIndex(ProcResourceMasks[I]);
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ResIdx2ProcResID[Index] = I;
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}
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}
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void SummaryView::onEvent(const HWInstructionEvent &Event) {
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if (Event.Type == HWInstructionEvent::Dispatched)
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LastInstructionIdx = Event.IR.getSourceIndex();
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// We are only interested in the "instruction retired" events generated by
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// the retire stage for instructions that are part of iteration #0.
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if (Event.Type != HWInstructionEvent::Retired ||
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Event.IR.getSourceIndex() >= Source.size())
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return;
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// Update the cumulative number of resource cycles based on the processor
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// resource usage information available from the instruction descriptor. We
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// need to compute the cumulative number of resource cycles for every
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// processor resource which is consumed by an instruction of the block.
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const Instruction &Inst = *Event.IR.getInstruction();
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const InstrDesc &Desc = Inst.getDesc();
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NumMicroOps += Desc.NumMicroOps;
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for (const std::pair<uint64_t, ResourceUsage> &RU : Desc.Resources) {
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if (RU.second.size()) {
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unsigned ProcResID = ResIdx2ProcResID[getResourceStateIndex(RU.first)];
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ProcResourceUsage[ProcResID] += RU.second.size();
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}
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}
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}
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void SummaryView::printView(raw_ostream &OS) const {
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std::string Buffer;
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raw_string_ostream TempStream(Buffer);
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DisplayValues DV;
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collectData(DV);
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TempStream << "Iterations: " << DV.Iterations;
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TempStream << "\nInstructions: " << DV.TotalInstructions;
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TempStream << "\nTotal Cycles: " << DV.TotalCycles;
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TempStream << "\nTotal uOps: " << DV.TotalUOps << '\n';
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TempStream << "\nDispatch Width: " << DV.DispatchWidth;
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TempStream << "\nuOps Per Cycle: "
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<< format("%.2f", floor((DV.UOpsPerCycle * 100) + 0.5) / 100);
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TempStream << "\nIPC: "
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<< format("%.2f", floor((DV.IPC * 100) + 0.5) / 100);
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TempStream << "\nBlock RThroughput: "
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<< format("%.1f", floor((DV.BlockRThroughput * 10) + 0.5) / 10)
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<< '\n';
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TempStream.flush();
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OS << Buffer;
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}
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void SummaryView::collectData(DisplayValues &DV) const {
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DV.Instructions = Source.size();
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DV.Iterations = (LastInstructionIdx / DV.Instructions) + 1;
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DV.TotalInstructions = DV.Instructions * DV.Iterations;
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DV.TotalCycles = TotalCycles;
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DV.DispatchWidth = DispatchWidth;
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DV.TotalUOps = NumMicroOps * DV.Iterations;
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DV.UOpsPerCycle = (double)DV.TotalUOps / TotalCycles;
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DV.IPC = (double)DV.TotalInstructions / TotalCycles;
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DV.BlockRThroughput = computeBlockRThroughput(SM, DispatchWidth, NumMicroOps,
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ProcResourceUsage);
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}
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json::Value SummaryView::toJSON() const {
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DisplayValues DV;
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collectData(DV);
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json::Object JO({{"Iterations", DV.Iterations},
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{"Instructions", DV.TotalInstructions},
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{"TotalCycles", DV.TotalCycles},
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{"TotaluOps", DV.TotalUOps},
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{"DispatchWidth", DV.DispatchWidth},
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{"uOpsPerCycle", DV.UOpsPerCycle},
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{"IPC", DV.IPC},
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{"BlockRThroughput", DV.BlockRThroughput}});
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return JO;
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}
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} // namespace mca.
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} // namespace llvm
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