Shedule & Run return different results

Unity Engine
, ,
1

Why does result differ?

using UnityEngine;
using Unity.Collections;
using Unity.Entities;
using Unity.Jobs;
using Unity.Transforms;

public class ClosureVarCaptureTestSystem : SystemBase
{
    protected override void OnUpdate()
    {
        NativeArray<float> testVar = new NativeArray<float>(1, Allocator.TempJob);

        Entities.ForEach((ref Translation position) =>
        {
            testVar[0] = 1f;

        }).Schedule();
 
        Debug.Log("Test var value:" + testVar[0]);

        testVar.Dispose();
    }
}

returns Test var value:0

Same code with Run() instead of Schedule() returns Test var value:1*.*

Unity 2019.3.15f1, entities 0.11.0-preview.7.

2

Most likely bacause you log the result before the job executes when using schendule.
Try adding this before the log :

Dependency.Complete();

you should get the same result than run, I think.

1 Like
3

Yep, that’s it. Thank you!

4

Also one very important thing to note… It looks like you disabled the jobs debugger. It would have told you about this race condition. It’s in the job menu, it’s a bad idea to turn it off unless you are just trying to profile in the editor.

1 Like
5

Thank you, a useful note! Unfortunately I do have JobsDebugger enabled and I do not see any notifications neither at compile time nor at runtime. Not sure what I’m doing wrong.

6

Do you have errors disabled in the console window?

7

I tried your code and it outputs the expect invalid operation exception for me.

8

I think info warnings and errors are enabled. E.g. I see warning ‘IJobForEachWithEntity is obsolete’ and also Error and Info badges showing 0. Maybe to delete Library folder and rebuild dependencies and project, to get some additional info is a good idea.

9

I’ve disabled system with [DisableAutoCreation] while experimenting with this, that’s why I’ve got no errors at runtime!