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Rewrite of process scheduling:

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- current and maximum priority per process;
- quantum size and current ticks left per process;
- max number of full quantums in a row allow
  (otherwise current priority is decremented)
This commit is contained in:
Jorrit Herder
2005-06-30 15:55:19 +00:00
parent ebd38d9a92
commit bac6068857
15 changed files with 235 additions and 177 deletions
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19
kernel/system.c
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@@ -186,14 +186,14 @@ int proc_nr; /* slot of process to clean up */
reset_timer(&rc->p_alarm_timer);
/* Make sure the exiting process is no longer scheduled. */
if (rc->p_flags == 0) lock_unready(rc);
if (rc->p_rts_flags == 0) lock_unready(rc);
/* If the process being terminated happens to be queued trying to send a
* message (e.g., the process was killed by a signal, rather than it doing
* an exit or it is forcibly shutdown in the stop sequence), then it must
* be removed from the message queues.
*/
if (rc->p_flags & SENDING) {
if (rc->p_rts_flags & SENDING) {
/* Check all proc slots to see if the exiting process is queued. */
for (rp = BEG_PROC_ADDR; rp < END_PROC_ADDR; rp++) {
if (rp->p_caller_q == NIL_PROC) continue;
@@ -225,7 +225,7 @@ int proc_nr; /* slot of process to clean up */
/* Now clean up the process table entry. Reset to defaults. */
kstrncpy(rc->p_name, "<none>", P_NAME_LEN); /* unset name */
sigemptyset(&rc->p_pending); /* remove pending signals */
rc->p_flags = SLOT_FREE; /* announce slot empty */
rc->p_rts_flags = SLOT_FREE; /* announce slot empty */
rc->p_sendmask = DENY_ALL_MASK; /* set most restrictive mask */
#if (CHIP == M68000)
@@ -299,13 +299,12 @@ int sig_nr; /* signal to be sent, 1 to _NSIG */
rp = proc_addr(proc_nr);
if (! sigismember(&rp->p_pending, sig_nr)) {
sigaddset(&rp->p_pending, sig_nr);
if (rp->p_flags & SIGNALED) return; /* other signal pending */
if (rp->p_flags == 0) lock_unready(rp); /* unready if not yet done */
rp->p_flags |= SIGNALED | SIG_PENDING; /* update signal flags */
m.NOTIFY_TYPE = KSIG_PENDING;
m.NOTIFY_ARG = 0;
m.NOTIFY_FLAGS = 0;
lock_notify(PM_PROC_NR, &m);
if (! (rp->p_rts_flags & SIGNALED)) { /* other pending */
if (rp->p_rts_flags == 0) lock_unready(rp); /* make not ready */
rp->p_rts_flags |= SIGNALED | SIG_PENDING; /* update flags */
m.NOTIFY_TYPE = KSIG_PENDING;
lock_notify(PM_PROC_NR, &m);
}
}
}