10b57cec5SDimitry Andric //===--------------------- RetireControlUnitStatistics.cpp ------*- C++ -*-===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric /// \file 90b57cec5SDimitry Andric /// 100b57cec5SDimitry Andric /// This file implements the RetireControlUnitStatistics interface. 110b57cec5SDimitry Andric /// 120b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 130b57cec5SDimitry Andric 140b57cec5SDimitry Andric #include "Views/RetireControlUnitStatistics.h" 150b57cec5SDimitry Andric #include "llvm/Support/Format.h" 160b57cec5SDimitry Andric 170b57cec5SDimitry Andric namespace llvm { 180b57cec5SDimitry Andric namespace mca { 190b57cec5SDimitry Andric 200b57cec5SDimitry Andric RetireControlUnitStatistics::RetireControlUnitStatistics(const MCSchedModel &SM) 210b57cec5SDimitry Andric : NumRetired(0), NumCycles(0), EntriesInUse(0), MaxUsedEntries(0), 220b57cec5SDimitry Andric SumOfUsedEntries(0) { 230b57cec5SDimitry Andric TotalROBEntries = SM.MicroOpBufferSize; 240b57cec5SDimitry Andric if (SM.hasExtraProcessorInfo()) { 250b57cec5SDimitry Andric const MCExtraProcessorInfo &EPI = SM.getExtraProcessorInfo(); 260b57cec5SDimitry Andric if (EPI.ReorderBufferSize) 270b57cec5SDimitry Andric TotalROBEntries = EPI.ReorderBufferSize; 280b57cec5SDimitry Andric } 290b57cec5SDimitry Andric } 300b57cec5SDimitry Andric 310b57cec5SDimitry Andric void RetireControlUnitStatistics::onEvent(const HWInstructionEvent &Event) { 320b57cec5SDimitry Andric if (Event.Type == HWInstructionEvent::Dispatched) { 330b57cec5SDimitry Andric unsigned NumEntries = 340b57cec5SDimitry Andric static_cast<const HWInstructionDispatchedEvent &>(Event).MicroOpcodes; 350b57cec5SDimitry Andric EntriesInUse += NumEntries; 360b57cec5SDimitry Andric } 370b57cec5SDimitry Andric 380b57cec5SDimitry Andric if (Event.Type == HWInstructionEvent::Retired) { 390b57cec5SDimitry Andric unsigned ReleasedEntries = Event.IR.getInstruction()->getDesc().NumMicroOps; 400b57cec5SDimitry Andric assert(EntriesInUse >= ReleasedEntries && "Invalid internal state!"); 410b57cec5SDimitry Andric EntriesInUse -= ReleasedEntries; 420b57cec5SDimitry Andric ++NumRetired; 430b57cec5SDimitry Andric } 440b57cec5SDimitry Andric } 450b57cec5SDimitry Andric 460b57cec5SDimitry Andric void RetireControlUnitStatistics::onCycleEnd() { 470b57cec5SDimitry Andric // Update histogram 480b57cec5SDimitry Andric RetiredPerCycle[NumRetired]++; 490b57cec5SDimitry Andric NumRetired = 0; 500b57cec5SDimitry Andric ++NumCycles; 510b57cec5SDimitry Andric MaxUsedEntries = std::max(MaxUsedEntries, EntriesInUse); 520b57cec5SDimitry Andric SumOfUsedEntries += EntriesInUse; 530b57cec5SDimitry Andric } 540b57cec5SDimitry Andric 550b57cec5SDimitry Andric void RetireControlUnitStatistics::printView(raw_ostream &OS) const { 560b57cec5SDimitry Andric std::string Buffer; 570b57cec5SDimitry Andric raw_string_ostream TempStream(Buffer); 580b57cec5SDimitry Andric TempStream << "\n\nRetire Control Unit - " 590b57cec5SDimitry Andric << "number of cycles where we saw N instructions retired:\n"; 600b57cec5SDimitry Andric TempStream << "[# retired], [# cycles]\n"; 610b57cec5SDimitry Andric 62*480093f4SDimitry Andric for (const std::pair<const unsigned, unsigned> &Entry : RetiredPerCycle) { 630b57cec5SDimitry Andric TempStream << " " << Entry.first; 640b57cec5SDimitry Andric if (Entry.first < 10) 650b57cec5SDimitry Andric TempStream << ", "; 660b57cec5SDimitry Andric else 670b57cec5SDimitry Andric TempStream << ", "; 680b57cec5SDimitry Andric TempStream << Entry.second << " (" 690b57cec5SDimitry Andric << format("%.1f", ((double)Entry.second / NumCycles) * 100.0) 700b57cec5SDimitry Andric << "%)\n"; 710b57cec5SDimitry Andric } 720b57cec5SDimitry Andric 730b57cec5SDimitry Andric unsigned AvgUsage = (double)SumOfUsedEntries / NumCycles; 740b57cec5SDimitry Andric double MaxUsagePercentage = ((double)MaxUsedEntries / TotalROBEntries) * 100.0; 750b57cec5SDimitry Andric double NormalizedMaxPercentage = floor((MaxUsagePercentage * 10) + 0.5) / 10; 760b57cec5SDimitry Andric double AvgUsagePercentage = ((double)AvgUsage / TotalROBEntries) * 100.0; 770b57cec5SDimitry Andric double NormalizedAvgPercentage = floor((AvgUsagePercentage * 10) + 0.5) / 10; 780b57cec5SDimitry Andric 790b57cec5SDimitry Andric TempStream << "\nTotal ROB Entries: " << TotalROBEntries 800b57cec5SDimitry Andric << "\nMax Used ROB Entries: " << MaxUsedEntries 810b57cec5SDimitry Andric << format(" ( %.1f%% )", NormalizedMaxPercentage) 820b57cec5SDimitry Andric << "\nAverage Used ROB Entries per cy: " << AvgUsage 830b57cec5SDimitry Andric << format(" ( %.1f%% )\n", NormalizedAvgPercentage); 840b57cec5SDimitry Andric 850b57cec5SDimitry Andric TempStream.flush(); 860b57cec5SDimitry Andric OS << Buffer; 870b57cec5SDimitry Andric } 880b57cec5SDimitry Andric 890b57cec5SDimitry Andric } // namespace mca 900b57cec5SDimitry Andric } // namespace llvm 91