forked from OSchip/llvm-project
99 lines
3.0 KiB
C++
99 lines
3.0 KiB
C++
//===--------------------- SummaryView.h ---------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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 summary view.
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///
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/// The goal of the summary view is to give a very quick overview of the
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/// performance throughput. Below is an example of summary view:
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///
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///
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/// Iterations: 300
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/// Instructions: 900
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/// Total Cycles: 610
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/// Dispatch Width: 2
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/// IPC: 1.48
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///
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///
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/// Instruction Info:
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/// [1]: #uOps
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/// [2]: Latency
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/// [3]: RThroughput
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/// [4]: MayLoad
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/// [5]: MayStore
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/// [6]: HasSideEffects
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///
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/// [1] [2] [3] [4] [5] [6] Instructions:
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/// 1 2 1.00 vmulps %xmm0, %xmm1, %xmm2
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/// 1 3 1.00 vhaddps %xmm2, %xmm2, %xmm3
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/// 1 3 1.00 vhaddps %xmm3, %xmm3, %xmm4
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///
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/// The summary view is structured in two sections.
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///
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/// The first section collects a a few performance numbers. The two main
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/// performance indicators are 'Total Cycles' and IPC (Instructions Per Cycle).
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///
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/// The second section shows the latency and reciprocal throughput of every
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/// instruction in the sequence. This section also reports extra informaton
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/// related to the number of micro opcodes, and opcode properties (i.e.
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/// 'MayLoad', 'MayStore', 'HasSideEffects)
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_TOOLS_LLVM_MCA_SUMMARYVIEW_H
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#define LLVM_TOOLS_LLVM_MCA_SUMMARYVIEW_H
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#include "SourceMgr.h"
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#include "View.h"
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#include "llvm/MC/MCInstPrinter.h"
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#include "llvm/MC/MCSubtargetInfo.h"
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#include "llvm/MC/MCInstrInfo.h"
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#include "llvm/Support/raw_ostream.h"
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#define DEBUG_TYPE "llvm-mca"
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namespace mca {
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/// \brief A printer class that knows how to collects statistics on the
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/// code analyzed by the llvm-mca tool.
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///
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/// This class knows how to print out the analysis information collected
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/// during the execution of the code. Internally, it delegates to other
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/// classes the task of printing out timeline information as well as
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/// resource pressure.
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class SummaryView : public View {
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const llvm::MCSubtargetInfo &STI;
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const llvm::MCInstrInfo &MCII;
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const SourceMgr &Source;
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llvm::MCInstPrinter &MCIP;
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const unsigned DispatchWidth;
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unsigned TotalCycles;
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void printSummary(llvm::raw_ostream &OS) const;
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void printInstructionInfo(llvm::raw_ostream &OS) const;
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public:
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SummaryView(const llvm::MCSubtargetInfo &sti, const llvm::MCInstrInfo &mcii,
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const SourceMgr &S, llvm::MCInstPrinter &IP, unsigned Width)
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: STI(sti), MCII(mcii), Source(S), MCIP(IP), DispatchWidth(Width),
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TotalCycles(0) {}
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void onCycleEnd(unsigned /* unused */) override { ++TotalCycles; }
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void printView(llvm::raw_ostream &OS) const override {
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printSummary(OS);
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printInstructionInfo(OS);
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}
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};
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} // namespace mca
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#endif
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