a2eee47450
This patch adds two new fields to the perf report generated by the SummaryView. Fields are now logically organized into two small groups; only the second group contains throughput indicators. Example: ``` Iterations: 100 Instructions: 300 Total Cycles: 414 Total uOps: 700 Dispatch Width: 4 uOps Per Cycle: 1.69 IPC: 0.72 Block RThroughput: 4.0 ``` This patch also updates the docs for llvm-mca. Due to the nature of this change, several tests in the tools/llvm-mca directory were affected, and had to be updated using script `update_mca_test_checks.py`. llvm-svn: 340946
90 lines
3.4 KiB
C++
90 lines
3.4 KiB
C++
//===--------------------- SummaryView.cpp -------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
/// \file
|
|
///
|
|
/// This file implements the functionalities used by the SummaryView to print
|
|
/// the report information.
|
|
///
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "Views/SummaryView.h"
|
|
#include "Support.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/Support/Format.h"
|
|
|
|
namespace mca {
|
|
|
|
#define DEBUG_TYPE "llvm-mca"
|
|
|
|
using namespace llvm;
|
|
|
|
SummaryView::SummaryView(const llvm::MCSchedModel &Model, const SourceMgr &S,
|
|
unsigned Width)
|
|
: SM(Model), Source(S), DispatchWidth(Width), TotalCycles(0),
|
|
NumMicroOps(0), ProcResourceUsage(Model.getNumProcResourceKinds(), 0),
|
|
ProcResourceMasks(Model.getNumProcResourceKinds(), 0) {
|
|
computeProcResourceMasks(SM, ProcResourceMasks);
|
|
}
|
|
|
|
void SummaryView::onEvent(const HWInstructionEvent &Event) {
|
|
// We are only interested in the "instruction dispatched" events generated by
|
|
// the dispatch stage for instructions that are part of iteration #0.
|
|
if (Event.Type != HWInstructionEvent::Dispatched)
|
|
return;
|
|
|
|
if (Event.IR.getSourceIndex() >= Source.size())
|
|
return;
|
|
|
|
// Update the cumulative number of resource cycles based on the processor
|
|
// resource usage information available from the instruction descriptor. We
|
|
// need to compute the cumulative number of resource cycles for every
|
|
// processor resource which is consumed by an instruction of the block.
|
|
const Instruction &Inst = *Event.IR.getInstruction();
|
|
const InstrDesc &Desc = Inst.getDesc();
|
|
NumMicroOps += Desc.NumMicroOps;
|
|
for (const std::pair<uint64_t, const ResourceUsage> &RU : Desc.Resources) {
|
|
if (RU.second.size()) {
|
|
const auto It = find(ProcResourceMasks, RU.first);
|
|
assert(It != ProcResourceMasks.end() &&
|
|
"Invalid processor resource mask!");
|
|
ProcResourceUsage[std::distance(ProcResourceMasks.begin(), It)] +=
|
|
RU.second.size();
|
|
}
|
|
}
|
|
}
|
|
|
|
void SummaryView::printView(raw_ostream &OS) const {
|
|
unsigned Iterations = Source.getNumIterations();
|
|
unsigned Instructions = Source.size();
|
|
unsigned TotalInstructions = Instructions * Iterations;
|
|
unsigned TotalUOps = NumMicroOps * Iterations;
|
|
double IPC = (double)TotalInstructions / TotalCycles;
|
|
double UOpsPerCycle = (double)TotalUOps / TotalCycles;
|
|
double BlockRThroughput = computeBlockRThroughput(
|
|
SM, DispatchWidth, NumMicroOps, ProcResourceUsage);
|
|
|
|
std::string Buffer;
|
|
raw_string_ostream TempStream(Buffer);
|
|
TempStream << "Iterations: " << Iterations;
|
|
TempStream << "\nInstructions: " << TotalInstructions;
|
|
TempStream << "\nTotal Cycles: " << TotalCycles;
|
|
TempStream << "\nTotal uOps: " << TotalUOps << '\n';
|
|
TempStream << "\nDispatch Width: " << DispatchWidth;
|
|
TempStream << "\nuOps Per Cycle: "
|
|
<< format("%.2f", floor((UOpsPerCycle * 100) + 0.5) / 100);
|
|
TempStream << "\nIPC: "
|
|
<< format("%.2f", floor((IPC * 100) + 0.5) / 100);
|
|
TempStream << "\nBlock RThroughput: "
|
|
<< format("%.1f", floor((BlockRThroughput * 10) + 0.5) / 10)
|
|
<< '\n';
|
|
TempStream.flush();
|
|
OS << Buffer;
|
|
}
|
|
} // namespace mca.
|