101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
#include "pm.h"
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#include <minix/callnr.h>
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#include <minix/com.h>
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#include <minix/config.h>
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#include <minix/sysinfo.h>
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#include <minix/type.h>
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#include <machine/archtypes.h>
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#include <lib.h>
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#include "mproc.h"
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#include "kernel/proc.h" /* for MIN_USER_Q */
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PRIVATE timer_t sched_timer;
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/*
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* makes a kernel call that schedules the process using the actuall scheduling
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* parameters set for this process
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*/
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PUBLIC int schedule_process(struct mproc * rmp)
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{
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int err;
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if ((err = sys_schedule(rmp->mp_endpoint, rmp->mp_priority,
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rmp->mp_time_slice)) != OK) {
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printf("PM: An error occurred when trying to schedule %s: %d\n",
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rmp->mp_name, err);
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}
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return err;
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}
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/*===========================================================================*
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* do_noquantum *
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*===========================================================================*/
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PUBLIC void do_noquantum(void)
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{
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int rv, proc_nr_n;
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register struct mproc *rmp;
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if (pm_isokendpt(m_in.m_source, &proc_nr_n) != OK) {
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printf("PM: WARNING: got an invalid endpoint in OOQ msg %u.\n",
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m_in.m_source);
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return;
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}
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rmp = &mproc[proc_nr_n];
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if (rmp->mp_priority < MIN_USER_Q) {
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rmp->mp_priority += 1; /* lower priority */
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}
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schedule_process(rmp);
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}
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/*===========================================================================*
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* takeover_scheduling *
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*===========================================================================*/
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PUBLIC void takeover_scheduling(void)
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{
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struct mproc *trmp;
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int proc_nr;
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tmr_inittimer(&sched_timer);
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for (proc_nr=0, trmp=mproc; proc_nr < NR_PROCS; proc_nr++, trmp++) {
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/* Don't takeover system processes. When the system starts,
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* this will typically only takeover init, from which other
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* user space processes will inherit. */
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if (trmp->mp_flags & IN_USE && !(trmp->mp_flags & PRIV_PROC)) {
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if (sys_schedctl(trmp->mp_endpoint))
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printf("PM: Error while taking over scheduling for %s\n",
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trmp->mp_name);
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trmp->mp_flags |= PM_SCHEDULED;
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}
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}
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pm_set_timer(&sched_timer, 100, balance_queues, 0);
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}
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/*===========================================================================*
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* balance_queues *
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*===========================================================================*/
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PUBLIC void balance_queues(tp)
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struct timer *tp;
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{
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struct mproc *rmp;
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int proc_nr;
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int rv;
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for (proc_nr=0, rmp=mproc; proc_nr < NR_PROCS; proc_nr++, rmp++) {
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if (rmp->mp_flags & IN_USE) {
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if (rmp->mp_priority > rmp->mp_max_priority) {
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rmp->mp_priority -= 1; /* increase priority */
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schedule_process(rmp);
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}
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}
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}
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pm_set_timer(&sched_timer, 100, balance_queues, 0);
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}
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