]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/blob - contrib/llvm-project/llvm/tools/llvm-mca/Views/SummaryView.cpp
Merge llvm, clang, compiler-rt, libc++, libunwind, lld, lldb and openmp
[FreeBSD/FreeBSD.git] / contrib / llvm-project / llvm / tools / llvm-mca / Views / SummaryView.cpp
1 //===--------------------- SummaryView.cpp -------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 /// \file
9 ///
10 /// This file implements the functionalities used by the SummaryView to print
11 /// the report information.
12 ///
13 //===----------------------------------------------------------------------===//
14
15 #include "Views/SummaryView.h"
16 #include "llvm/ADT/SmallVector.h"
17 #include "llvm/MCA/Support.h"
18 #include "llvm/Support/Format.h"
19
20 namespace llvm {
21 namespace mca {
22
23 #define DEBUG_TYPE "llvm-mca"
24
25 SummaryView::SummaryView(const MCSchedModel &Model, ArrayRef<MCInst> S,
26                          unsigned Width)
27     : SM(Model), Source(S), DispatchWidth(Width?Width: Model.IssueWidth),
28       LastInstructionIdx(0),
29       TotalCycles(0), NumMicroOps(0),
30       ProcResourceUsage(Model.getNumProcResourceKinds(), 0),
31       ProcResourceMasks(Model.getNumProcResourceKinds()),
32       ResIdx2ProcResID(Model.getNumProcResourceKinds(), 0) {
33   computeProcResourceMasks(SM, ProcResourceMasks);
34   for (unsigned I = 1, E = SM.getNumProcResourceKinds(); I < E; ++I) {
35     unsigned Index = getResourceStateIndex(ProcResourceMasks[I]);
36     ResIdx2ProcResID[Index] = I;
37   }
38 }
39
40 void SummaryView::onEvent(const HWInstructionEvent &Event) {
41   if (Event.Type == HWInstructionEvent::Dispatched)
42     LastInstructionIdx = Event.IR.getSourceIndex();
43
44   // We are only interested in the "instruction retired" events generated by
45   // the retire stage for instructions that are part of iteration #0.
46   if (Event.Type != HWInstructionEvent::Retired ||
47       Event.IR.getSourceIndex() >= Source.size())
48     return;
49
50   // Update the cumulative number of resource cycles based on the processor
51   // resource usage information available from the instruction descriptor. We
52   // need to compute the cumulative number of resource cycles for every
53   // processor resource which is consumed by an instruction of the block.
54   const Instruction &Inst = *Event.IR.getInstruction();
55   const InstrDesc &Desc = Inst.getDesc();
56   NumMicroOps += Desc.NumMicroOps;
57   for (const std::pair<uint64_t, ResourceUsage> &RU : Desc.Resources) {
58     if (RU.second.size()) {
59       unsigned ProcResID = ResIdx2ProcResID[getResourceStateIndex(RU.first)];
60       ProcResourceUsage[ProcResID] += RU.second.size();
61     }
62   }
63 }
64
65 void SummaryView::printView(raw_ostream &OS) const {
66   unsigned Instructions = Source.size();
67   unsigned Iterations = (LastInstructionIdx / Instructions) + 1;
68   unsigned TotalInstructions = Instructions * Iterations;
69   unsigned TotalUOps = NumMicroOps * Iterations;
70   double IPC = (double)TotalInstructions / TotalCycles;
71   double UOpsPerCycle = (double)TotalUOps / TotalCycles;
72   double BlockRThroughput = computeBlockRThroughput(
73       SM, DispatchWidth, NumMicroOps, ProcResourceUsage);
74
75   std::string Buffer;
76   raw_string_ostream TempStream(Buffer);
77   TempStream << "Iterations:        " << Iterations;
78   TempStream << "\nInstructions:      " << TotalInstructions;
79   TempStream << "\nTotal Cycles:      " << TotalCycles;
80   TempStream << "\nTotal uOps:        " << TotalUOps << '\n';
81   TempStream << "\nDispatch Width:    " << DispatchWidth;
82   TempStream << "\nuOps Per Cycle:    "
83              << format("%.2f", floor((UOpsPerCycle * 100) + 0.5) / 100);
84   TempStream << "\nIPC:               "
85              << format("%.2f", floor((IPC * 100) + 0.5) / 100);
86   TempStream << "\nBlock RThroughput: "
87              << format("%.1f", floor((BlockRThroughput * 10) + 0.5) / 10)
88              << '\n';
89   TempStream.flush();
90   OS << Buffer;
91 }
92
93 } // namespace mca.
94 } // namespace llvm