Summary of scheduling behavior

The following table summarizes how the thread scheduler divides time in normal and freetime-by-ratio mode:

Partition state Normal Freetime-by-ratio
Usage < budget By priority By priority
Usage > budget and there's free time By priority By ratio of budgets
Full load By ratio of budgets By ratio of budgets
Partitions running a critical thread at any load By priority By priority
Note: The scheduler's overhead doesn't increase with the number of threads; but, it may increase with the number of partitions, so you should use as few partitions as possible.