The safety system in the C# Job System
What is a job system?
A job system manages multithreaded code by creating jobs instead of threads.
A job system manages a group of worker threads across multiple cores. It usually has one worker thread per logical CPU core, to avoid context switching (although it may reserve some cores for the operating system or other dedicated applications).
A job system puts jobs into a job queue to execute. Worker threads in a job system take items from the job queue and execute them. A job system manages dependencies and ensures that jobs execute in the appropriate order.
What is a job?
A job is a small unit of work that does one specific task. A job receives parameters and operates on data, similar to how a method call behaves. Jobs can be self-contained, or they can depend on other jobs to complete before they can run.
What are job dependencies?
In complex systems, like those required for game development, it is unlikely that each job is self-contained. One job is usually preparing the data for the next job. Jobs are aware of and support dependencies to make this work.
If jobA has a dependency on jobB, the job system ensures that jobA does not start executing until jobB is complete.
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Is something described here not working as you expect it to? It might be a Known Issue. Please check with the Issue Tracker at issuetracker.unity3d.com.
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thanks for helping to make the Unity documentation better!
The safety system in the C# Job System