mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 11:02:59 +02:00
c08b465d91
It makes more sense to print out the number of micro opcodes that are issued every cycle rather than the number of instructions issued per cycle. This behavior is also consistent with the dispatch-stats: numbers from the two views can now be easily compared. llvm-svn: 357919
96 lines
2.9 KiB
C++
96 lines
2.9 KiB
C++
//===--------------------- SchedulerStatistics.h ----------------*- 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 defines class SchedulerStatistics. Class SchedulerStatistics is a
|
|
/// View that listens to instruction issue events in order to print general
|
|
/// statistics related to the hardware schedulers.
|
|
///
|
|
/// Example:
|
|
/// ========
|
|
///
|
|
/// Schedulers - number of cycles where we saw N instructions issued:
|
|
/// [# issued], [# cycles]
|
|
/// 0, 6 (2.9%)
|
|
/// 1, 106 (50.7%)
|
|
/// 2, 97 (46.4%)
|
|
///
|
|
/// Scheduler's queue usage:
|
|
/// [1] Resource name.
|
|
/// [2] Average number of used buffer entries.
|
|
/// [3] Maximum number of used buffer entries.
|
|
/// [4] Total number of buffer entries.
|
|
///
|
|
/// [1] [2] [3] [4]
|
|
/// JALU01 0 0 20
|
|
/// JFPU01 15 18 18
|
|
/// JLSAGU 0 0 12
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TOOLS_LLVM_MCA_SCHEDULERSTATISTICS_H
|
|
#define LLVM_TOOLS_LLVM_MCA_SCHEDULERSTATISTICS_H
|
|
|
|
#include "Views/View.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/MC/MCSubtargetInfo.h"
|
|
#include <map>
|
|
|
|
namespace llvm {
|
|
namespace mca {
|
|
|
|
class SchedulerStatistics final : public View {
|
|
const llvm::MCSchedModel &SM;
|
|
unsigned LQResourceID;
|
|
unsigned SQResourceID;
|
|
|
|
unsigned NumIssued;
|
|
unsigned NumCycles;
|
|
|
|
unsigned MostRecentLoadDispatched;
|
|
unsigned MostRecentStoreDispatched;
|
|
|
|
// Tracks the usage of a scheduler's queue.
|
|
struct BufferUsage {
|
|
unsigned SlotsInUse;
|
|
unsigned MaxUsedSlots;
|
|
uint64_t CumulativeNumUsedSlots;
|
|
};
|
|
|
|
using Histogram = std::map<unsigned, unsigned>;
|
|
Histogram IssueWidthPerCycle;
|
|
|
|
std::vector<BufferUsage> Usage;
|
|
|
|
void updateHistograms();
|
|
void printSchedulerStats(llvm::raw_ostream &OS) const;
|
|
void printSchedulerUsage(llvm::raw_ostream &OS) const;
|
|
|
|
public:
|
|
SchedulerStatistics(const llvm::MCSubtargetInfo &STI);
|
|
void onEvent(const HWInstructionEvent &Event) override;
|
|
void onCycleBegin() override { NumCycles++; }
|
|
void onCycleEnd() override { updateHistograms(); }
|
|
|
|
// Increases the number of used scheduler queue slots of every buffered
|
|
// resource in the Buffers set.
|
|
void onReservedBuffers(const InstRef &IR,
|
|
llvm::ArrayRef<unsigned> Buffers) override;
|
|
|
|
// Decreases by one the number of used scheduler queue slots of every
|
|
// buffered resource in the Buffers set.
|
|
void onReleasedBuffers(const InstRef &IR,
|
|
llvm::ArrayRef<unsigned> Buffers) override;
|
|
|
|
void printView(llvm::raw_ostream &OS) const override;
|
|
};
|
|
} // namespace mca
|
|
} // namespace llvm
|
|
|
|
#endif
|