1 //===--------------------- SchedulerStatistics.cpp --------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 /// \file
10 ///
11 /// This file implements the SchedulerStatistics interface.
12 ///
13 //===----------------------------------------------------------------------===//
14
15 #include "SchedulerStatistics.h"
16 #include "llvm/Support/Format.h"
17
18 using namespace llvm;
19
20 namespace mca {
21
onEvent(const HWInstructionEvent & Event)22 void SchedulerStatistics::onEvent(const HWInstructionEvent &Event) {
23 if (Event.Type == HWInstructionEvent::Issued)
24 ++NumIssued;
25 }
26
onReservedBuffers(ArrayRef<unsigned> Buffers)27 void SchedulerStatistics::onReservedBuffers(ArrayRef<unsigned> Buffers) {
28 for (const unsigned Buffer : Buffers) {
29 if (BufferedResources.find(Buffer) != BufferedResources.end()) {
30 BufferUsage &BU = BufferedResources[Buffer];
31 BU.SlotsInUse++;
32 BU.MaxUsedSlots = std::max(BU.MaxUsedSlots, BU.SlotsInUse);
33 continue;
34 }
35
36 BufferedResources.insert(
37 std::pair<unsigned, BufferUsage>(Buffer, {1U, 1U}));
38 }
39 }
40
onReleasedBuffers(ArrayRef<unsigned> Buffers)41 void SchedulerStatistics::onReleasedBuffers(ArrayRef<unsigned> Buffers) {
42 for (const unsigned Buffer : Buffers) {
43 assert(BufferedResources.find(Buffer) != BufferedResources.end() &&
44 "Buffered resource not in map?");
45 BufferUsage &BU = BufferedResources[Buffer];
46 BU.SlotsInUse--;
47 }
48 }
49
printSchedulerStatistics(llvm::raw_ostream & OS) const50 void SchedulerStatistics::printSchedulerStatistics(
51 llvm::raw_ostream &OS) const {
52 std::string Buffer;
53 raw_string_ostream TempStream(Buffer);
54 TempStream << "\n\nSchedulers - number of cycles where we saw N instructions "
55 "issued:\n";
56 TempStream << "[# issued], [# cycles]\n";
57 for (const std::pair<unsigned, unsigned> &Entry : IssuedPerCycle) {
58 TempStream << " " << Entry.first << ", " << Entry.second << " ("
59 << format("%.1f", ((double)Entry.second / NumCycles) * 100)
60 << "%)\n";
61 }
62
63 TempStream.flush();
64 OS << Buffer;
65 }
66
printSchedulerUsage(raw_ostream & OS) const67 void SchedulerStatistics::printSchedulerUsage(raw_ostream &OS) const {
68 std::string Buffer;
69 raw_string_ostream TempStream(Buffer);
70 TempStream << "\n\nScheduler's queue usage:\n";
71 // Early exit if no buffered resources were consumed.
72 if (BufferedResources.empty()) {
73 TempStream << "No scheduler resources used.\n";
74 TempStream.flush();
75 OS << Buffer;
76 return;
77 }
78
79 for (unsigned I = 0, E = SM.getNumProcResourceKinds(); I < E; ++I) {
80 const MCProcResourceDesc &ProcResource = *SM.getProcResource(I);
81 if (ProcResource.BufferSize <= 0)
82 continue;
83
84 const auto It = BufferedResources.find(I);
85 unsigned MaxUsedSlots =
86 It == BufferedResources.end() ? 0 : It->second.MaxUsedSlots;
87 TempStream << ProcResource.Name << ", " << MaxUsedSlots << '/'
88 << ProcResource.BufferSize << '\n';
89 }
90
91 TempStream.flush();
92 OS << Buffer;
93 }
94 } // namespace mca
95