5 Commits

Author	SHA1	Message	Date
Justin C. Miller	a10aca573d	[kernel] Change to one-shot timer scheduler ... Instead of many timer interrupts and decrementing a process' remaining quanta, change to setting a single timer for when a process should be preempted. If it uses its whole timeslice, demote it. If it uses less than half before blocking, promote it. Determine timeslice based on priority as well. This change also required changing the apic timer interface to be purely interval (in microseconds) based instead of its previous interval/tick hybrid.	2020-06-03 20:56:59 -07:00
Justin C. Miller	5e6769036c	APIC timer calibration ... Now the APIC timer is calibrated against the PIT, and the interval for timer_enable takes a number of microseconds instead of raw ticks and a divisor.	2018-09-16 18:56:01 -07:00
Justin C. Miller	bfaab294e6	Set up initial task switching (ring0 only)	2018-05-21 09:07:52 -07:00
Justin C. Miller	59700b07db	Add initial IO APIC support ... - IO APIC vector mapping - Legacy PIC disable - Real interrupts happening	2018-05-02 16:46:37 -07:00
Justin C. Miller	428e4563d0	Add initial classes representing APIC	2018-05-01 01:03:19 -07:00