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//===--------------------- TimelineView.cpp ---------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \brief
///
/// This file implements the TimelineView interface.
///
//===----------------------------------------------------------------------===//
#include "TimelineView.h"
using namespace llvm;
namespace mca {
void TimelineView::initialize(unsigned MaxIterations) {
unsigned NumInstructions =
AsmSequence.getNumIterations() * AsmSequence.size();
if (!MaxIterations)
MaxIterations = DEFAULT_ITERATIONS;
unsigned NumEntries =
std::min(NumInstructions, MaxIterations * AsmSequence.size());
Timeline.resize(NumEntries);
TimelineViewEntry NullTVEntry = {0, 0, 0, 0, 0};
std::fill(Timeline.begin(), Timeline.end(), NullTVEntry);
WaitTime.resize(AsmSequence.size());
WaitTimeEntry NullWTEntry = {0, 0, 0, 0};
std::fill(WaitTime.begin(), WaitTime.end(), NullWTEntry);
}
void TimelineView::onEvent(const HWInstructionEvent &Event) {
const unsigned Index = Event.IR.getSourceIndex();
if (CurrentCycle >= MaxCycle || Index >= Timeline.size())
return;
switch (Event.Type) {
case HWInstructionEvent::Retired: {
TimelineViewEntry &TVEntry = Timeline[Index];
TVEntry.CycleRetired = CurrentCycle;
// Update the WaitTime entry which corresponds to this Index.
WaitTimeEntry &WTEntry = WaitTime[Index % AsmSequence.size()];
WTEntry.Executions++;
WTEntry.CyclesSpentInSchedulerQueue +=
TVEntry.CycleIssued - TVEntry.CycleDispatched;
assert(TVEntry.CycleDispatched <= TVEntry.CycleReady);
WTEntry.CyclesSpentInSQWhileReady +=
TVEntry.CycleIssued - TVEntry.CycleReady;
WTEntry.CyclesSpentAfterWBAndBeforeRetire +=
(TVEntry.CycleRetired - 1) - TVEntry.CycleExecuted;
break;
}
case HWInstructionEvent::Ready:
Timeline[Index].CycleReady = CurrentCycle;
break;
case HWInstructionEvent::Issued:
Timeline[Index].CycleIssued = CurrentCycle;
break;
case HWInstructionEvent::Executed:
Timeline[Index].CycleExecuted = CurrentCycle;
break;
case HWInstructionEvent::Dispatched:
Timeline[Index].CycleDispatched = CurrentCycle;
break;
default:
return;
}
LastCycle = std::max(LastCycle, CurrentCycle);
}
void TimelineView::printWaitTimeEntry(formatted_raw_ostream &OS,
const WaitTimeEntry &Entry,
unsigned SourceIndex) const {
OS << SourceIndex << '.';
OS.PadToColumn(7);
if (Entry.Executions == 0) {
OS << "- - - - ";
} else {
double AverageTime1, AverageTime2, AverageTime3;
unsigned Executions = Entry.Executions;
AverageTime1 = (double)Entry.CyclesSpentInSchedulerQueue / Executions;
AverageTime2 = (double)Entry.CyclesSpentInSQWhileReady / Executions;
AverageTime3 = (double)Entry.CyclesSpentAfterWBAndBeforeRetire / Executions;
OS << Executions;
OS.PadToColumn(13);
OS << format("%.1f", floor((AverageTime1 * 10) + 0.5) / 10);
OS.PadToColumn(20);
OS << format("%.1f", floor((AverageTime2 * 10) + 0.5) / 10);
OS.PadToColumn(27);
OS << format("%.1f", floor((AverageTime3 * 10) + 0.5) / 10);
OS.PadToColumn(34);
}
}
void TimelineView::printAverageWaitTimes(raw_ostream &OS) const {
if (WaitTime.empty())
return;
std::string Buffer;
raw_string_ostream TempStream(Buffer);
formatted_raw_ostream FOS(TempStream);
FOS << "\n\nAverage Wait times (based on the timeline view):\n"
<< "[0]: Executions\n"
<< "[1]: Average time spent waiting in a scheduler's queue\n"
<< "[2]: Average time spent waiting in a scheduler's queue while ready\n"
<< "[3]: Average time elapsed from WB until retire stage\n\n";
FOS << " [0] [1] [2] [3]\n";
// Use a different string stream for the instruction.
std::string Instruction;
raw_string_ostream InstrStream(Instruction);
for (unsigned I = 0, E = WaitTime.size(); I < E; ++I) {
printWaitTimeEntry(FOS, WaitTime[I], I);
// Append the instruction info at the end of the line.
const MCInst &Inst = AsmSequence.getMCInstFromIndex(I);
MCIP.printInst(&Inst, InstrStream, "", STI);
InstrStream.flush();
// Consume any tabs or spaces at the beginning of the string.
StringRef Str(Instruction);
Str = Str.ltrim();
FOS << " " << Str << '\n';
FOS.flush();
Instruction = "";
OS << Buffer;
Buffer = "";
}
}
void TimelineView::printTimelineViewEntry(formatted_raw_ostream &OS,
const TimelineViewEntry &Entry,
unsigned Iteration,
unsigned SourceIndex) const {
if (Iteration == 0 && SourceIndex == 0)
OS << '\n';
OS << '[' << Iteration << ',' << SourceIndex << ']';
OS.PadToColumn(10);
for (unsigned I = 0, E = Entry.CycleDispatched; I < E; ++I)
OS << ((I % 5 == 0) ? '.' : ' ');
OS << TimelineView::DisplayChar::Dispatched;
if (Entry.CycleDispatched != Entry.CycleExecuted) {
// Zero latency instructions have the same value for CycleDispatched,
// CycleIssued and CycleExecuted.
for (unsigned I = Entry.CycleDispatched + 1, E = Entry.CycleIssued; I < E;
++I)
OS << TimelineView::DisplayChar::Waiting;
if (Entry.CycleIssued == Entry.CycleExecuted)
OS << TimelineView::DisplayChar::DisplayChar::Executed;
else {
if (Entry.CycleDispatched != Entry.CycleIssued)
OS << TimelineView::DisplayChar::Executing;
for (unsigned I = Entry.CycleIssued + 1, E = Entry.CycleExecuted; I < E;
++I)
OS << TimelineView::DisplayChar::Executing;
OS << TimelineView::DisplayChar::Executed;
}
}
for (unsigned I = Entry.CycleExecuted + 1, E = Entry.CycleRetired; I < E; ++I)
OS << TimelineView::DisplayChar::RetireLag;
OS << TimelineView::DisplayChar::Retired;
// Skip other columns.
for (unsigned I = Entry.CycleRetired + 1, E = LastCycle; I <= E; ++I)
OS << ((I % 5 == 0 || I == LastCycle) ? '.' : ' ');
}
static void printTimelineHeader(formatted_raw_ostream &OS, unsigned Cycles) {
OS << "\n\nTimeline view:\n";
if (Cycles >= 10) {
OS.PadToColumn(10);
for (unsigned I = 0; I <= Cycles; ++I) {
if (((I / 10) & 1) == 0)
OS << ' ';
else
OS << I % 10;
}
OS << '\n';
}
OS << "Index";
OS.PadToColumn(10);
for (unsigned I = 0; I <= Cycles; ++I) {
if (((I / 10) & 1) == 0)
OS << I % 10;
else
OS << ' ';
}
OS << '\n';
}
void TimelineView::printTimeline(raw_ostream &OS) const {
std::string Buffer;
raw_string_ostream StringStream(Buffer);
formatted_raw_ostream FOS(StringStream);
printTimelineHeader(FOS, LastCycle);
FOS.flush();
OS << Buffer;
// Use a different string stream for the instruction.
std::string Instruction;
raw_string_ostream InstrStream(Instruction);
for (unsigned I = 0, E = Timeline.size(); I < E; ++I) {
Buffer = "";
const TimelineViewEntry &Entry = Timeline[I];
if (Entry.CycleRetired == 0)
return;
unsigned Iteration = I / AsmSequence.size();
unsigned SourceIndex = I % AsmSequence.size();
printTimelineViewEntry(FOS, Entry, Iteration, SourceIndex);
// Append the instruction info at the end of the line.
const MCInst &Inst = AsmSequence.getMCInstFromIndex(I);
MCIP.printInst(&Inst, InstrStream, "", STI);
InstrStream.flush();
// Consume any tabs or spaces at the beginning of the string.
StringRef Str(Instruction);
Str = Str.ltrim();
FOS << " " << Str << '\n';
FOS.flush();
Instruction = "";
OS << Buffer;
}
}
} // namespace mca
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