Issues with IParallelFilter in a JobComponentSystem

So I am honestly super lost on this one since the error message that I get completely denies me the fact that my NativeArray is indeed allocated as a TempJob. Also, if anyone knows a better way of structuring my system to be more performance oriented, then please speak up (because at the current moment, the code is super freaking slow). Code Below:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4. using Unity.Entities;
5. using Unity.Jobs;
6. using Unity.Collections;
7.  
8. [UpdateAfter(typeof(MarchingCubesSystem))]
9. public class FilterMeshSystem : JobComponentSystem
10. {
11.  
12.     EntityQuery eq;
13.  
14.     protected override void OnCreate()
15.     {
16.  
17.         eq = World.Active.EntityManager.CreateEntityQuery(typeof(shouldFilterMesh));
18.  
19.  
20.     }
21.  
22.     protected override JobHandle OnUpdate(JobHandle inputDeps)
23.     {
24.         NativeArray<Entity> entities = eq.ToEntityArray(Allocator.TempJob);
25.  
26.  
27.         if (entities.Length == 0)
28.         {
29.             return inputDeps;
30.         }
31.  
32.         World.Active.EntityManager.RemoveComponent(entities[0], typeof(shouldFilterMesh));
33.  
34.         NativeList<int> filteredIndices = new NativeList<int>(Allocator.Persistent);
35.  
36.  
37.         int SizeX = World.Active.EntityManager.GetComponentData<ChunkStatus>(entities[0]).SizeX;
38.         int SizeY = World.Active.EntityManager.GetComponentData<ChunkStatus>(entities[0]).SizeY;
39.         int SizeZ = World.Active.EntityManager.GetComponentData<ChunkStatus>(entities[0]).SizeY;
40.  
41.  
42.  
43.         MeshDataCompactionJob filterHandle = new MeshDataCompactionJob
44.         {
45.             unFilteredVerticesData = GetBufferFromEntity<UnfilteredVerticesArray>(false),
46.             entities = entities
47.         };
48.  
49.         JobHandle MCJ = filterHandle.ScheduleAppend(filteredIndices, (SizeX - 1) * (SizeY - 1) * (SizeZ - 1) * 15, 1, inputDeps);
50.  
51.         MCJ.Complete();
52.  
53.         //BuildComapctionArrayJob filteredVertices = new NativeArray<float4>(filteredIndices.Length, Allocator.TempJob);
54.         BuildComapctionArrayJob buildHandle = new BuildComapctionArrayJob
55.         {
56.             unFilteredVerticesData = GetBufferFromEntity<UnfilteredVerticesArray>(false),
57.             FilteredIndices = filteredIndices,
58.             filteredVerticesData = GetBufferFromEntity<filteredVerticesArray>(false),
59.             entities = entities
60.         };
61.  
62.         JobHandle BCA = buildHandle.Schedule(filteredIndices.Length, 1);
63.  
64.  
65.         return BCA;
66.     }
67.  
68.  
69.  
70. }
71.  

And the error message that I get is:

InvalidOperationException: The NativeArray BuildComapctionArrayJob.FilteredIndices may not be deallocated from the job BuildComapctionArrayJob because the Allocation type can not be deallocated from a job. (Only Allocation.Persistent & Allocation.TempJob can be deallocated from a job)

 

You didnt include your job in the code you posted. I'm guessing you're trying to use [DeallocateOnJobCompletion] on filteredindices. You cant deallocate NativeList from inside a job. Not sure if it's a bug or intended. Just keep your list as a member of your system and Clear it before you schedule your job

 

Totally didn't think of that. However, I think I can save on performance by moving the second job of my system into another system so that I am not forced to sync. This would take more memory than the solution you proposed (in fact, memory savings would be a huge amount since I am creating 100s of voxel chunks at a time), but I think moving each job to another system and saving the FilteredIndices in a DynamicBuffer somehow to be used into another system would be faster. Thanks for the help!