Ordering of jobs when fewer agents than jobs

[Michael at Compute Thing]

I would like to order some test jobs within a test stage.

I understand that jobs will run in parallel if there are sufficient agents, but when I have fewer agents than jobs, I would like to have some priority.

I have 4 test jobs, covering high priority and low priority tests across 2 target platforms. If I have 4 agents I would want all the test jobs to start together. But if only 2 agents are available, I would want the high priority tests run first. And if I only have 1 agent, I would want a specific platform to be tested first.

As the jobs relate to integration tests they take some time: around 2 hours for high priority tests and 6 hours for low priority tests. With ordering, I would have a worst case verdict on priority tests in 4 hours; without ordering, I could be waiting 16 hours.

I see that there is an earlier answer in Bamboo-questions/ordering-jobs/qaq-p/682501#M28849 but that dismisses the idea ordering is a concern.