Ah yes, I get your problem now, you have to deal with changing environments, not just your own setup to solve a particular problem. I see. That makes it a lot more complicated. Is there a way to fold the pipeline into a single process?
Not pretty from a modularity point of view but it just might get the job done.
I am using Celery workers which run a single tensorflow model in solo concurrency mode. The current workaround is to keep track of per process gpu fraction and then incorporate information about Total GPU memory available when assigning workers/celery process to individual GPUs.
Right, so essentially you are doing per process memory management because the layers lower down aren't smart enough to handle this transparently. I'm fairly sure that the nvidia libraries do support releasing memory and from what I see on my own machine memory usage of the GPU does go up and down when running longer jobs. So maybe it isn't so much a structural problem as a problem in one particular module that you exercise a lot?
Not pretty from a modularity point of view but it just might get the job done.