EntityCommandBuffer.PlayBack didn't wait other job complete?

Unity Engine
,
1

I have seen EntityCommandBuffer.PlayBack source code, when it playback command like AddEntity, It didn’t CALL CompleteAllJobs like other EntityManager’s API. So seem it didn’t guarantee determinate ? Is it a bug or feature, or i have misunderstand something?

2

You should just complete the jobs that are relevant to that ECB. Why would you complete ALL jobs?

3

Because other job may excuting quering or operation on the same entity type which ECB add

4

That shouldn’t be an issue.

Are you using
EntityCommandBufferSystem.AddJobHandleForProducer?

5

So if a ECB is going to add a entity, the jobs run before the ECB must AddJobHandleForProducer to this ECB?

6 
            handle = new InitializeObservationsJob
                {
                    TeamToEntity = this.teamToEntityMap,
                    EntityCommandBuffer = this.barrier.CreateCommandBuffer().ToConcurrent(),
                }
                .Schedule(this, handle);

            this.barrier.AddJobHandleForProducer(handle);

Should look something like this