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6b547686c5
to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351636 91177308-0d34-0410-b5e6-96231b3b80d8
86 lines
3.1 KiB
C++
86 lines
3.1 KiB
C++
//===--------------------- DispatchStatistics.cpp ---------------------*- C++
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//-*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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/// \file
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///
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/// This file implements the DispatchStatistics interface.
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///
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//===----------------------------------------------------------------------===//
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#include "Views/DispatchStatistics.h"
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#include "llvm/Support/Format.h"
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namespace llvm {
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namespace mca {
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void DispatchStatistics::onEvent(const HWStallEvent &Event) {
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if (Event.Type < HWStallEvent::LastGenericEvent)
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HWStalls[Event.Type]++;
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}
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void DispatchStatistics::onEvent(const HWInstructionEvent &Event) {
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if (Event.Type != HWInstructionEvent::Dispatched)
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return;
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const auto &DE = static_cast<const HWInstructionDispatchedEvent &>(Event);
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NumDispatched += DE.MicroOpcodes;
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}
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void DispatchStatistics::printDispatchHistogram(raw_ostream &OS) const {
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std::string Buffer;
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raw_string_ostream TempStream(Buffer);
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TempStream << "\n\nDispatch Logic - "
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<< "number of cycles where we saw N micro opcodes dispatched:\n";
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TempStream << "[# dispatched], [# cycles]\n";
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for (const std::pair<unsigned, unsigned> &Entry : DispatchGroupSizePerCycle) {
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double Percentage = ((double)Entry.second / NumCycles) * 100.0;
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TempStream << " " << Entry.first << ", " << Entry.second
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<< " (" << format("%.1f", floor((Percentage * 10) + 0.5) / 10)
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<< "%)\n";
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}
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TempStream.flush();
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OS << Buffer;
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}
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static void printStalls(raw_ostream &OS, unsigned NumStalls,
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unsigned NumCycles) {
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if (!NumStalls) {
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OS << NumStalls;
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return;
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}
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double Percentage = ((double)NumStalls / NumCycles) * 100.0;
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OS << NumStalls << " ("
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<< format("%.1f", floor((Percentage * 10) + 0.5) / 10) << "%)";
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}
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void DispatchStatistics::printDispatchStalls(raw_ostream &OS) const {
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std::string Buffer;
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raw_string_ostream SS(Buffer);
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SS << "\n\nDynamic Dispatch Stall Cycles:\n";
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SS << "RAT - Register unavailable: ";
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printStalls(SS, HWStalls[HWStallEvent::RegisterFileStall], NumCycles);
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SS << "\nRCU - Retire tokens unavailable: ";
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printStalls(SS, HWStalls[HWStallEvent::RetireControlUnitStall], NumCycles);
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SS << "\nSCHEDQ - Scheduler full: ";
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printStalls(SS, HWStalls[HWStallEvent::SchedulerQueueFull], NumCycles);
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SS << "\nLQ - Load queue full: ";
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printStalls(SS, HWStalls[HWStallEvent::LoadQueueFull], NumCycles);
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SS << "\nSQ - Store queue full: ";
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printStalls(SS, HWStalls[HWStallEvent::StoreQueueFull], NumCycles);
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SS << "\nGROUP - Static restrictions on the dispatch group: ";
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printStalls(SS, HWStalls[HWStallEvent::DispatchGroupStall], NumCycles);
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SS << '\n';
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SS.flush();
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OS << Buffer;
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}
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} // namespace mca
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} // namespace llvm
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