void
mtd_stats_t::report ()
{
if (ok_amt_stat_freq == 0 ||
!tsdiff (start_sample, sfs_get_tsnow(), ok_amt_stat_freq))
return;
epoch_t e = new_epoch ();
warn ("STATS: i=%d;o=%d;r=%d;q=%d;a=%d;t=%d;l=%d\n",
e.in, e.out, e.rejects, e.queued, e.async_serv, e.to, e.len_msec);
}
/*-----------------------------------------------------------------------
* resched -- reschedule processor to highest priority ready process
*
* Notes: Upon entry, currpid gives current process id.
* Proctab[currpid].pstate gives correct NEXT state for
* current process if other than PRREADY.
*------------------------------------------------------------------------
*/
int resched()
{
register struct pentry *optr; /* pointer to old process entry */
register struct pentry *nptr; /* pointer to new process entry */
int rand_num,temp_currpid,i;
/* no switch needed if current process priority higher than next*/
if(used_scheduler == RANDOMSCHED)
{
optr= &proctab[currpid];
}
else if(used_scheduler == LINUXSCHED)
{
optr= &proctab[currpid];
}
else
{
if ( ( (optr= &proctab[currpid])->pstate == PRCURR) &&
(lastkey(rdytail)<optr->pprio))
{
return(OK);
}
}
/* force context switch */
if (optr->pstate == PRCURR)
{
optr->pstate = PRREADY;
optr->arrival_time = ctr1000;
if(preempt >= 0)
optr->quantum_left = preempt;
insert(currpid,rdyhead,optr->pprio);
}
/* remove highest priority process at end of ready list */
if(used_scheduler != LINUXSCHED)
{
execution_time[currpid]+=(QUANTUM-preempt);
}
else
execution_time[currpid]+= (proctab[currpid].quantum_left -preempt);
//kprintf("\nPreempt: %d",preempt);
if(used_scheduler == RANDOMSCHED)
{
if(q[rdyhead].qnext == rdytail)
return(OK);
do
{
rand_num = rand()%100;
// kprintf("Random Number: %d",rand_num);
if(rand_num >=80)
temp_currpid = random_getpid(1);
else if(rand_num <80 && rand_num >=50)
temp_currpid = random_getpid(2);
else
temp_currpid = random_getpid(3);
}while(temp_currpid == -1);
currpid = temp_currpid;
nptr = &proctab[currpid];
dequeue(currpid);
//kprintf("\n Current PID : %d",currpid);
}
else if(used_scheduler == LINUXSCHED)
{
temp_currpid = linux_getpid();
if(temp_currpid == -1)
{
new_epoch();
temp_currpid = linux_getpid();
if(temp_currpid == -1)
{
temp_currpid=0;;
}
}
currpid = temp_currpid;
nptr = &proctab[currpid];
dequeue(currpid);
}
else
{
nptr = &proctab[ (currpid = getlast(rdytail)) ];
}
nptr->pstate = PRCURR; /* mark it currently running */
#ifdef RTCLOCK
if(used_scheduler != LINUXSCHED)
preempt = QUANTUM; /* reset preemption counter */
else
{ preempt = proctab[currpid].quantum_left;
}
#endif
ctxsw((int)&optr->pesp, (int)optr->pirmask, (int)&nptr->pesp, (int)nptr->pirmask);
/* The OLD process returns here when resumed. */
return OK;
}