MIDI DIFFICULTIES, Part II

kernel 2.5/2.6 to the rescue:
- "POSIX clock" support really means "accurate timing"
- reprograms APIC (or similar) timer to wakeup kernel when necessary.
- removes all reliance on kernel HZ value
- incredibly efficient, incredible resolution
microsecond-level scheduling for any SCHED_FIFO/SCHED_RR task

"simple" solution:

one thread handling MIDI input, sleeps in poll(2)

       while (1) {
	         poll ();
		 read_and_parse_and_deliver ();
            }

one thread handling MIDI output, sleeps in usleep(2)

       while (1) {
		 usleep (time_till_next_event());
                 write_pending_events (now());
            }