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【Unite 2018 Tokyo】C# Job SystemとECS(Entity Component System)解説

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講演者:Dan Miller(Unity Technologies)

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・プログラマー

受講者が得られる知見
・データ指向に基づいた設計に対する理解
・UnityのECSを使った開発手法に対する理解
・C# Job Systemを使ったマルチスレッド対応コードの書き方

Published in: Technology

【Unite 2018 Tokyo】C# Job SystemとECS(Entity Component System)解説

  1. 1. A Dan Miller danielmi@unity3d.com @DanMillerDev Intro to C# Job system and Entity Component System
  2. 2. Overview ● Terminology and System overview ● Implementing Jobs and Entities ● Building a demo
  3. 3. C# Job System Multi-thread your code in a safe, accessible and efficient way ● API for scheduling jobs that run on multiple threads as well as linking dependencies ● Provides protection from pitfalls of multi-threaded code by giving easy to understand errors messages for things like dependencies and race conditions
  4. 4. Entity Component System A new way for writing high-performance code by default ● Data-Oriented approach to development that allows you to separate data from the processes that manipulate that data. Entity a lookup index (database key) into the parallel streams Components parallel streams of data, grouped by archetype System code that manipulates data
  5. 5. What is Classic The current Object oriented design pattern, GameObjects and Monobehaviors ● Data and processes are coupled together ● Largely dependant on reference types
  6. 6. Memory Layout - Classic ● Data is scattered… ● Loading from memory to cache is very slow...
  7. 7. Extra information and data ● Unity components contain extra data when referenced ● Instantiating is a problem ● Moving data from Memory to cache is very slow
  8. 8. How data is processed in Classic One at a time, on the main thread
  9. 9. How ECS and the C# Job System are different than classic
  10. 10. ECS Bullet Render Spawning Player Render Health Enemy Render Position Position Health Position Spawning Entity Data Some complex parallelized behavior Render Job Render System Filter : Render Some complex parallelized behavior Health Job Filter : Some complex parallelized behavior Spawning Job Filter : Health System Spawning System Position Health Render Spawning
  11. 11. ECS & C# Job System ● Data is tightly packed in memory ● Data is being processed in parallel ● Only worry about the specific data you want to operate on.
  12. 12. How to get Started Today
  13. 13. Available in 2018.1 ● Change scripting runtime version to use .NET 4.x Equivalent (instead of .NET 3.5) ● Change package manifest to include ECS packages
  14. 14. Demo
  15. 15. Burst Compiler A new LLVM-based math-aware backend Compiler Technology takes C# jobs and produces highly-optimized code.
  16. 16. Additional Resources https://unity3d.com/unity/features/job-system-ECS
  17. 17. Thanks! Dan Miller danielmi@unity3d.com @DanMillerDev

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