Konata

• Konata is an instruction pipeline visualizer for Onikiri2-Kanata/Gem5-O3PipeView formats.
• ASPLOS 2018 learning gem5 tutorial presentation is here
• The Onikiri2-Kanata format is described in here. It can represent a more detailed pipeline behavior than Gem5-O3PipeView.

Installation

There are two ways to launch Konata. If you fail to launch a pre-built binary, please try the second way.

1. Extract an archive and launch an executable file (konata.exe or konata).
   • Pre-built binaries are available from here.
2. Launch from this repository.
   1. Install node.js from https://nodejs.org
   2. Clone this repository.
   3. Launch install.bat (Windows) or install.sh (Linux/MacOS).
   4. Launch Konata from konata.vbs (Windows) or konata.sh (Linux/MacOS).

Usage

Basic

1. Generate a trace log from gem5 with the O3 CPU model
   • Execute gem5 with the following flags
   • This example is from http://www.m5sim.org/Visualization

   $ ./build/ARM/gem5.opt \
       --debug-flags=O3PipeView \
       --debug-start=<first tick of interest> \
       --debug-file=trace.out \
       configs/example/se.py \
       --cpu-type=detailed \
       --caches -c <path to binary> \
       -m <last cycle of interest>
   

2. Load a generated "trace.out" to Konata
   • from a menu in a window or using drag&drop
3. If you use O3CPUAll as well as O3PipeView as follows, Konata shows more detailed CPU log and visualizes dependency between instructions.

   --debug-flags=O3PipeView,O3CPUAll
   

Keyboard

• mouse wheel up, key up: scroll up
• mouse wheel down, key down: scroll down
• ctrl + mouse wheel up, key "+", ctrl+key up: zoom in
• ctrl + mouse wheel down, key "-", ctrl+key down: zoom out
• ctrl + f, F3, shift+F3: find a string
• F1, ctrl+shift+p: open a command palette

Tips

• If you miss pipelines in a right pane, you can move to pipelines by click "Adjust position" in a right-click menu.
• You can visually compare two traces as follows:
  1. Load two trace files
  2. Right-click and select "Synchronized school" & "Transparent mode"
  3. Right-click and select a color scheme
  4. Move to another tab and adjust a position with the transparent mode
• If you cannot launch Konata, try to install the following runtimes (or try to install the latest Google Chrome, because it uses the same runtimes).

  sudo apt install \
      libgconf-2-4 \
      libgtk-3-0 \
      libxss1 \
      libnss3 \
      libasound2 \
      libx11-xcb1 \
      libcanberra-gtk3-module \
      libgbm-dev
  

• In O3CPUAll mode, Konata associates each line in trace.out with each instruction by tracking [sn:<serial number>]. If you output custom log with the above serial information, Konata shows your custom log.

Development

• Install dependent runtimes as follows or use Dockerfile included in a source tree

  # Install node.js/npm
  sudo apt install nodejs
  
  # Install electron/electron-packager
  # Since electron is huge, they are installed globally.
  npm -g install electron
  npm -g install electron-packager
  
  # Run and build
  make init   # Setup libraries
  make        # Run Konata
  make pack   # Build & pack Konata for Windows/Linux/Mac
  

License

Copyright (C) 2016-2022 Ryota Shioya shioya@ci.i.u-tokyo.ac.jp

This application is released under the 3-Clause BSD License, see LICENSE.md. This application bundles ELECTRON and many third-party packages in accordance with the licenses presented in THIRD-PARTY-LICENSES.md.