How long can a FIFO thread run with AP Scheduling?
First non_AP (i.e. classic Neutrino) scheduling: • If not preemepted by a higher priority thread, a SS thread will run until it voluntarily gives up control. With AP scheduling, an FIFO thread will: • If not preempted by a higher priority thread in the same patrition, an SS thread will run until it voluntarily gives up control, or it’s partition runs out of budget. In other words, FIFO behavior is unchanged as long as your partition has budget. On a loaded system it is best to assume that an FIFO thread may be timesliced every millisecond with threads in other partitions. However, relative to all other threads in the same partition, FIFO behavior is the same as in classic Neutrino scheduling.
