1 //===--------------------- ResourcePressureView.cpp -------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// This file implements methods in the ResourcePressureView interface.
13 //===----------------------------------------------------------------------===//
15 #include "ResourcePressureView.h"
16 #include "llvm/Support/FormattedStream.h"
17 #include "llvm/Support/raw_ostream.h"
23 void ResourcePressureView::initialize() {
24 // Populate the map of resource descriptors.
25 unsigned R2VIndex = 0;
26 const MCSchedModel &SM = STI.getSchedModel();
27 for (unsigned I = 0, E = SM.getNumProcResourceKinds(); I < E; ++I) {
28 const MCProcResourceDesc &ProcResource = *SM.getProcResource(I);
29 unsigned NumUnits = ProcResource.NumUnits;
30 // Skip groups and invalid resources with zero units.
31 if (ProcResource.SubUnitsIdxBegin || !NumUnits)
34 Resource2VecIndex.insert(std::pair<unsigned, unsigned>(I, R2VIndex));
35 R2VIndex += ProcResource.NumUnits;
38 NumResourceUnits = R2VIndex;
39 ResourceUsage.resize(NumResourceUnits * (Source.size() + 1));
40 std::fill(ResourceUsage.begin(), ResourceUsage.end(), 0.0);
43 void ResourcePressureView::onEvent(const HWInstructionEvent &Event) {
44 // We're only interested in Issue events.
45 if (Event.Type != HWInstructionEvent::Issued)
47 const auto &IssueEvent = static_cast<const HWInstructionIssuedEvent &>(Event);
48 const unsigned SourceIdx = Event.IR.getSourceIndex() % Source.size();
49 for (const std::pair<ResourceRef, double> &Use : IssueEvent.UsedResources) {
50 const ResourceRef &RR = Use.first;
51 assert(Resource2VecIndex.find(RR.first) != Resource2VecIndex.end());
52 unsigned R2VIndex = Resource2VecIndex[RR.first];
53 R2VIndex += countTrailingZeros(RR.second);
54 ResourceUsage[R2VIndex + NumResourceUnits * SourceIdx] += Use.second;
55 ResourceUsage[R2VIndex + NumResourceUnits * Source.size()] += Use.second;
59 static void printColumnNames(formatted_raw_ostream &OS,
60 const MCSchedModel &SM) {
61 unsigned Column = OS.getColumn();
62 for (unsigned I = 1, ResourceIndex = 0, E = SM.getNumProcResourceKinds();
64 const MCProcResourceDesc &ProcResource = *SM.getProcResource(I);
65 unsigned NumUnits = ProcResource.NumUnits;
66 // Skip groups and invalid resources with zero units.
67 if (ProcResource.SubUnitsIdxBegin || !NumUnits)
70 for (unsigned J = 0; J < NumUnits; ++J) {
72 OS << "[" << ResourceIndex;
76 OS.PadToColumn(Column);
83 static void printResourcePressure(formatted_raw_ostream &OS, double Pressure,
85 if (!Pressure || Pressure < 0.005) {
88 // Round to the value to the nearest hundredth and then print it.
89 OS << format("%.2f", floor((Pressure * 100) + 0.5) / 100);
94 void ResourcePressureView::printResourcePressurePerIteration(
95 raw_ostream &OS, unsigned Executions) const {
97 raw_string_ostream TempStream(Buffer);
98 formatted_raw_ostream FOS(TempStream);
100 FOS << "\n\nResources:\n";
101 const MCSchedModel &SM = STI.getSchedModel();
102 for (unsigned I = 1, ResourceIndex = 0, E = SM.getNumProcResourceKinds();
104 const MCProcResourceDesc &ProcResource = *SM.getProcResource(I);
105 unsigned NumUnits = ProcResource.NumUnits;
106 // Skip groups and invalid resources with zero units.
107 if (ProcResource.SubUnitsIdxBegin || !NumUnits)
110 for (unsigned J = 0; J < NumUnits; ++J) {
111 FOS << '[' << ResourceIndex;
116 FOS << "- " << ProcResource.Name << '\n';
122 FOS << "\n\nResource pressure per iteration:\n";
124 printColumnNames(FOS, SM);
128 for (unsigned I = 0, E = NumResourceUnits; I < E; ++I) {
129 double Usage = ResourceUsage[I + Source.size() * E];
130 printResourcePressure(FOS, Usage / Executions, (I + 1) * 7);
137 void ResourcePressureView::printResourcePressurePerInstruction(
138 raw_ostream &OS, unsigned Executions) const {
140 raw_string_ostream TempStream(Buffer);
141 formatted_raw_ostream FOS(TempStream);
143 FOS << "\n\nResource pressure by instruction:\n";
144 printColumnNames(FOS, STI.getSchedModel());
145 FOS << "Instructions:\n";
147 std::string Instruction;
148 raw_string_ostream InstrStream(Instruction);
150 for (unsigned I = 0, E = Source.size(); I < E; ++I) {
151 for (unsigned J = 0; J < NumResourceUnits; ++J) {
152 double Usage = ResourceUsage[J + I * NumResourceUnits];
153 printResourcePressure(FOS, Usage / Executions, (J + 1) * 7);
156 MCIP.printInst(&Source.getMCInstFromIndex(I), InstrStream, "", STI);
158 StringRef Str(Instruction);
160 // Remove any tabs or spaces at the beginning of the instruction.