Resolved Burst and IJobParallelFor vectorization

Hi everyone,

I have a simple job that I'm wondering why I cannot vectorize.

First the code:

Code (CSharp):

1. [BurstCompile]
2. public struct Init : IJobParallelFor
3. {
4.     [WriteOnly]
5.     public NativeArray<bool> Possibilities;
6.     [ReadOnly]
7.     public NativeArray<Direction> RuntimeTileData;
8.     public int PossibilitiesPerSlotCount;
9.  
10.     public void Execute(int index)
11.     {
12.         int tileIndex = index % PossibilitiesPerSlotCount;
13.         Possibilities[index] = RuntimeTileData[tileIndex] == 0;
14.     }
15. }

• Direction is a basic enum.
• I've removed a bunch of stuff so don't really look into the logic here, I just want to understand why it's not vectorizing correctly.

And this is what I'm seeing int the diagnostic window:

Any idea what I'm doing wrong here?

Thanks!

 

Hi thanks for the help but just tried what you suggested and it didn't change anything.

 

Hum interesting, disabling SafetyChecks will generate the correct vectorized version.
I have other jobs where I know vectorization will fail, they still have errors in the diagnostic window while the Init job doesn't when safety checks are disabled.

So I guess this is more of an issue related to safety checks in editor?

 

Yes, for accurate profiling I'm always using a standalone build.
But, as far as I know, there isn't any way to assure everything is bursted and vectorized other than the "LLVM IR Optimization Diagnostics" tab in the Burst debugger.

 

Completely wrong. Of course, you can. You only can't write back to that variable and this is where native containers (pointers specifically) step into the scene. And he's not writing back to that variable and there is no need native container for simple read-only int field.

A very long time ago, more than 1.5 years ago