91 lines
3.2 KiB
C++
91 lines
3.2 KiB
C++
|
//===--------------------- RetireControlUnitStatistics.cpp ------*- C++ -*-===//
|
||
|
|
//
|
||
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
||
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
||
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
||
|
|
//
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
/// \file
|
||
|
|
///
|
||
|
|
/// This file implements the RetireControlUnitStatistics interface.
|
||
|
|
///
|
||
|
|
//===----------------------------------------------------------------------===//
|
||
|
|
|
||
|
|
#include "Views/RetireControlUnitStatistics.h"
|
||
|
|
#include "llvm/Support/Format.h"
|
||
|
|
|
||
|
|
namespace llvm {
|
||
|
|
namespace mca {
|
||
|
|
|
||
|
|
RetireControlUnitStatistics::RetireControlUnitStatistics(const MCSchedModel &SM)
|
||
|
|
: NumRetired(0), NumCycles(0), EntriesInUse(0), MaxUsedEntries(0),
|
||
|
|
SumOfUsedEntries(0) {
|
||
|
|
TotalROBEntries = SM.MicroOpBufferSize;
|
||
|
|
if (SM.hasExtraProcessorInfo()) {
|
||
|
|
const MCExtraProcessorInfo &EPI = SM.getExtraProcessorInfo();
|
||
|
|
if (EPI.ReorderBufferSize)
|
||
|
|
TotalROBEntries = EPI.ReorderBufferSize;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void RetireControlUnitStatistics::onEvent(const HWInstructionEvent &Event) {
|
||
|
|
if (Event.Type == HWInstructionEvent::Dispatched) {
|
||
|
|
unsigned NumEntries =
|
||
|
|
static_cast<const HWInstructionDispatchedEvent &>(Event).MicroOpcodes;
|
||
|
|
EntriesInUse += NumEntries;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (Event.Type == HWInstructionEvent::Retired) {
|
||
|
|
unsigned ReleasedEntries = Event.IR.getInstruction()->getDesc().NumMicroOps;
|
||
|
|
assert(EntriesInUse >= ReleasedEntries && "Invalid internal state!");
|
||
|
|
EntriesInUse -= ReleasedEntries;
|
||
|
|
++NumRetired;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void RetireControlUnitStatistics::onCycleEnd() {
|
||
|
|
// Update histogram
|
||
|
|
RetiredPerCycle[NumRetired]++;
|
||
|
|
NumRetired = 0;
|
||
|
|
++NumCycles;
|
||
|
|
MaxUsedEntries = std::max(MaxUsedEntries, EntriesInUse);
|
||
|
|
SumOfUsedEntries += EntriesInUse;
|
||
|
|
}
|
||
|
|
|
||
|
|
void RetireControlUnitStatistics::printView(raw_ostream &OS) const {
|
||
|
|
std::string Buffer;
|
||
|
|
raw_string_ostream TempStream(Buffer);
|
||
|
|
TempStream << "\n\nRetire Control Unit - "
|
||
|
|
<< "number of cycles where we saw N instructions retired:\n";
|
||
|
|
TempStream << "[# retired], [# cycles]\n";
|
||
|
|
|
||
|
|
for (const std::pair<const unsigned, unsigned> &Entry : RetiredPerCycle) {
|
||
|
|
TempStream << " " << Entry.first;
|
||
|
|
if (Entry.first < 10)
|
||
|
|
TempStream << ", ";
|
||
|
|
else
|
||
|
|
TempStream << ", ";
|
||
|
|
TempStream << Entry.second << " ("
|
||
|
|
<< format("%.1f", ((double)Entry.second / NumCycles) * 100.0)
|
||
|
|
<< "%)\n";
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned AvgUsage = (double)SumOfUsedEntries / NumCycles;
|
||
|
|
double MaxUsagePercentage = ((double)MaxUsedEntries / TotalROBEntries) * 100.0;
|
||
|
|
double NormalizedMaxPercentage = floor((MaxUsagePercentage * 10) + 0.5) / 10;
|
||
|
|
double AvgUsagePercentage = ((double)AvgUsage / TotalROBEntries) * 100.0;
|
||
|
|
double NormalizedAvgPercentage = floor((AvgUsagePercentage * 10) + 0.5) / 10;
|
||
|
|
|
||
|
|
TempStream << "\nTotal ROB Entries: " << TotalROBEntries
|
||
|
|
<< "\nMax Used ROB Entries: " << MaxUsedEntries
|
||
|
|
<< format(" ( %.1f%% )", NormalizedMaxPercentage)
|
||
|
|
<< "\nAverage Used ROB Entries per cy: " << AvgUsage
|
||
|
|
<< format(" ( %.1f%% )\n", NormalizedAvgPercentage);
|
||
|
|
|
||
|
|
TempStream.flush();
|
||
|
|
OS << Buffer;
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace mca
|
||
|
|
} // namespace llvm
|