int main(int argc, char *argv[]) {
if (argc != 2) return 0;
sscanf(argv[1], "%d", &pid);
printf("attaching\n");
proctrace(PTRACE_ATTACH, pid, NULL, NULL);
printf("waiting for child to stop\n");
proctrace_wait(-1, NULL, 0, NULL);
print_signal();
printf("waited. child should be stopped\n");
proctrace(PTRACE_SYSCALL, pid, NULL, NULL);
proctrace(PTRACE_CONT, pid, NULL, NULL);
printf("waiting for the system call\n");
proctrace_wait(-1, NULL, 0, NULL);
print_signal();
printf("child did it's thing. continuing and waiting for child to quit...\n");
long sc = proctrace(PTRACE_PEEKUSER, pid, (void*) (4 * ORIG_EAX), NULL);
printf("not minus 1: %ld\n", sc);
proctrace(PTRACE_CONT, pid, NULL, NULL);
proctrace_wait(-1, NULL, 0, NULL);
return 0;
}
static void
schedready(Sched *sch, Proc *p, int locked)
{
Mpl pl;
int pri;
Schedq *rq;
pl = splhi();
if(edfready(p)){
splx(pl);
return;
}
/* if(m->externup != p)
m->readied = p; *//* group scheduling, will be removed */
updatecpu(p);
pri = reprioritize(p);
p->priority = pri;
rq = &sch->runq[pri];
p->state = Ready;
queueproc(sch, rq, p, locked);
if(p->trace)
proctrace(p, SReady, 0);
splx(pl);
}
static void
deadlineintr(Ureg* ureg, Timer *t)
{
Proc *up = externup();
/* Proc reached deadline */
extern int panicking;
Sched *sch;
Proc *p;
if(panicking || active.exiting)
return;
p = t->ta;
now = ms();
DPRINT("%lu deadlineintr %d[%s]\n", now, p->pid, statename[p->state]);
/* If we're interrupting something other than the proc pointed to by t->a,
* we've already achieved recheduling, so we need not do anything
* Otherwise, we must cause a reschedule, but if we call sched()
* here directly, the timer interrupt routine will not finish its business
* Instead, we cause the resched to happen when the interrupted proc
* returns to user space
*/
if(p == up){
if(up->trace)
proctrace(up, SInts, 0);
up->delaysched++;
sch = procsched(up);
sch->delayedscheds++;
}
}
void
edfrecord(Proc *p)
{
int32_t used;
Edf *e;
if((e = edflock(p)) == nil)
return;
used = now - e->s;
if(e->d - now <= 0)
e->edfused += used;
else
e->extraused += used;
if(e->S > 0){
if(e->S <= used){
if(p->trace)
proctrace(p, SSlice, 0);
DPRINT("%lu edfrecord slice used up\n", now);
e->d = now;
e->S = 0;
}else
e->S -= used;
}
e->s = now;
edfunlock();
}
/*
* SMP performs better than AMP with few cores.
* So, leave this here by now. We should probably
* write a unified version of runproc good enough for
* both SMP and AMP.
*/
static Proc*
smprunproc(void)
{
Mach *m = machp();
Schedq *rq;
Proc *p;
uint32_t start, now;
int i;
start = perfticks();
run.preempts++;
loop:
/*
* find a process that last ran on this processor (affinity),
* or one that hasn't moved in a while (load balancing). Every
* time around the loop affinity goes down.
*/
spllo();
for(i = 0;; i++){
/*
* find the highest priority target process that this
* processor can run given affinity constraints.
*
*/
for(rq = &run.runq[Nrq-1]; rq >= run.runq; rq--){
for(p = rq->head; p; p = p->rnext){
if(p->mp == nil || p->mp == sys->machptr[m->machno]
|| (!p->wired && i > 0))
goto found;
}
}
/* waste time or halt the CPU */
idlehands();
/* remember how much time we're here */
now = perfticks();
m->perf.inidle += now-start;
start = now;
}
found:
splhi();
p = dequeueproc(&run, rq, p);
if(p == nil)
goto loop;
p->state = Scheding;
p->mp = sys->machptr[m->machno];
if(edflock(p)){
edfrun(p, rq == &run.runq[PriEdf]); /* start deadline timer and do admin */
edfunlock();
}
if(p->trace)
proctrace(p, SRun, 0);
return p;
}
static void
release(Proc *p)
{
/* Called with edflock held */
Edf *e;
int32_t n;
int64_t nowns;
e = p->edf;
e->flags &= ~Yield;
if(e->d - now < 0){
e->periods++;
e->r = now;
if((e->flags & Sporadic) == 0){
/*
* Non sporadic processes stay true to their period;
* calculate next release time.
* Second test limits duration of while loop.
*/
if((n = now - e->t) > 0){
if(n < e->T)
e->t += e->T;
else
e->t = now + e->T - (n % e->T);
}
}else{
/* Sporadic processes may not be released earlier than
* one period after this release
*/
e->t = e->r + e->T;
}
e->d = e->r + e->D;
e->S = e->C;
DPRINT("%lu release %d[%s], r=%lu, d=%lu, t=%lu, S=%lu\n",
now, p->pid, statename[p->state], e->r, e->d, e->t, e->S);
if(p->trace){
nowns = todget(nil);
proctrace(p, SRelease, nowns);
proctrace(p, SDeadline, nowns + 1000LL*e->D);
}
}else{
DPRINT("%lu release %d[%s], too late t=%lu, called from %#p\n",
now, p->pid, statename[p->state], e->t, getcallerpc());
}
}
// substitute for wait4() system call
pid_t proctrace_wait(pid_t pid, int *status, int options, struct rusage *rusage) {
#ifdef USE_PTRACE
return wait4(pid, status, options, rusage);
#endif
disable_signal();
if (attached_pid == 0) {
if (pid == -1) {
printf("I don't know what to do in proctrace_wait\n");
exit(1);
}
attached_pid = pid;
}
if (singlestep) {
ctl("step");
singlestep = 0;
} else {
char buf[35];
sprintf(buf, "/proc/%d/wait", attached_pid);
int fd = open(buf, O_WRONLY);
proctrace_wait_mask = ((1ULL << 31) - 1) << 1;
proctrace_wait_mask |= 1ULL;
proctrace_wait_mask |= (1ULL << 40);
// temp hack for strace
proctrace_wait_mask |= (1ULL << 33);
unsigned long long big_endian = 0;
int i;
for (i = 0; i < 8; ++i) {
big_endian |= ((proctrace_wait_mask >> (8*i)) & ((1 << 8)-1)) << (8-i-1)*8;
}
long retvalue = write(fd, &big_endian, sizeof(big_endian));
if (retvalue < 0) {
printf("write to wait failed, fd: %d, buf: %s\n", fd, buf);
}
close(fd);
}
if (status) {
siginfo_t a;
if (proctrace(PTRACE_GETSIGINFO, attached_pid, NULL, (void *)&a) == -1) {
*status = 0;
} else {
if (a.si_signo == 0) a.si_signo = SIGSTOP;
if (a.si_signo > 32) {
*status = (SIGTRAP << 8) | 0177;
} else {
*status = (a.si_signo << 8) | 0177;
}
}
}
return attached_pid;
}
void
edfstop(Proc *p)
{
Edf *e;
if(e = edflock(p)){
DPRINT("%lu edfstop %d[%s]\n", now, p->pid, statename[p->state]);
if(p->trace)
proctrace(p, SExpel, 0);
e->flags &= ~Admitted;
if(e->Timer.tt)
timerdel(&e->Timer);
edfunlock();
}
}
void
qlock(QLock *q)
{
Proc *up = externup();
Proc *p;
uint64_t t0;
cycles(&t0);
if(!islo() && machp()->ilockdepth != 0){
print("qlock with ilockdepth %d,", machp()->ilockdepth);
stacksnippet();
}
if(up != nil && up->nlocks)
print("qlock: %#p: nlocks %d", getcallerpc(&q), up->nlocks);
if(!canlock(&q->use)){
lock(&q->use);
slockstat(getcallerpc(&q), t0);
}
qlockstats.qlock++;
if(!q->locked) {
q->locked = 1;
q->pc = getcallerpc(&q);
unlock(&q->use);
return;
}
if(up == nil)
panic("qlock");
qlockstats.qlockq++;
p = q->tail;
if(p == 0)
q->head = up;
else
p->qnext = up;
q->tail = up;
up->qnext = 0;
up->state = Queueing;
up->qpc = getcallerpc(&q);
if(up->trace)
proctrace(up, SLock, 0);
unlock(&q->use);
sched();
lockstat(getcallerpc(&q), t0);
}
Proc*
runproc(void)
{
Mach *m = machp();
Schedq *rq;
Proc *p;
uint32_t start, now;
if(nosmp)
return singlerunproc();
//NIX modeset cannot work without halt every cpu at boot
//if(sys->nmach <= AMPmincores)
else
return smprunproc();
start = perfticks();
run.preempts++;
rq = nil;
if(m->machno != 0){
do{
spllo();
while(m->proc == nil)
idlehands();
now = perfticks();
m->perf.inidle += now-start;
start = now;
splhi();
p = m->proc;
}while(p == nil);
p->state = Scheding;
p->mp = sys->machptr[m->machno];
if(edflock(p)){
edfrun(p, rq == &run.runq[PriEdf]); /* start deadline timer and do admin */
edfunlock();
}
if(p->trace)
proctrace(p, SRun, 0);
return p;
}
mach0sched();
return nil; /* not reached */
}
void
edfrun(Proc *p, int edfpri)
{
Edf *e;
int32_t tns;
Sched *sch;
e = p->edf;
sch = procsched(p);
/* Called with edflock held */
if(edfpri){
tns = e->d - now;
if(tns <= 0 || e->S == 0){
/* Deadline reached or resources exhausted,
* deschedule forthwith
*/
p->delaysched++;
sch->delayedscheds++;
e->s = now;
return;
}
if(e->S < tns)
tns = e->S;
if(tns < 20)
tns = 20;
e->Timer.tns = 1000LL * tns; /* µs to ns */
if(e->Timer.tt == nil || e->Timer.tf != deadlineintr){
DPRINT("%lu edfrun, deadline=%lu\n", now, tns);
}else{
DPRINT("v");
}
if(p->trace)
proctrace(p, SInte, todget(nil) + e->Timer.tns);
e->Timer.tmode = Trelative;
e->Timer.tf = deadlineintr;
e->Timer.ta = p;
timeradd(&e->Timer);
}else{
DPRINT("<");
}
e->s = now;
}
void
wlock(RWlock *q)
{
Proc *up = externup();
Proc *p;
uint64_t t0;
cycles(&t0);
if(!canlock(&q->use)){
lock(&q->use);
slockstat(getcallerpc(&q), t0);
}
qlockstats.wlock++;
if(q->readers == 0 && q->writer == 0){
/* noone waiting, go for it */
q->wpc = getcallerpc(&q);
q->wproc = up;
q->writer = 1;
unlock(&q->use);
return;
}
/* wait */
qlockstats.wlockq++;
p = q->tail;
if(up == nil)
panic("wlock");
if(p == nil)
q->head = up;
else
p->qnext = up;
q->tail = up;
up->qnext = 0;
up->state = QueueingW;
if(up->trace)
proctrace(up, SLock, 0);
unlock(&q->use);
sched();
lockstat(getcallerpc(&q), t0);
}
static void
schedready(Sched *sch, Proc *p, int locked)
{
Mpl pl;
int pri;
Schedq *rq;
pl = splhi();
if(edfready(p)){
splx(pl);
return;
}
updatecpu(p);
pri = reprioritize(p);
p->priority = pri;
rq = &sch->runq[pri];
p->state = Ready;
queueproc(sch, rq, p, locked);
if(p->trace)
proctrace(p, SReady, 0);
splx(pl);
}
void
edfyield(void)
{
Proc *up = externup();
/* sleep until next release */
Edf *e;
int32_t n;
if((e = edflock(up)) == nil)
return;
if(up->trace)
proctrace(up, SYield, 0);
if((n = now - e->t) > 0){
if(n < e->T)
e->t += e->T;
else
e->t = now + e->T - (n % e->T);
}
e->r = e->t;
e->flags |= Yield;
e->d = now;
if (up->Timer.tt == nil){
n = e->t - now;
if(n < 20)
n = 20;
up->Timer.tns = 1000LL * n;
up->Timer.tf = releaseintr;
up->Timer.tmode = Trelative;
up->Timer.ta = up;
up->trend = &up->sleep;
timeradd(&up->Timer);
}else if(up->Timer.tf != releaseintr)
print("edfyield: surprise! %#p\n", up->Timer.tf);
edfunlock();
sleep(&up->sleep, yfn, nil);
}
void print_signal() {
siginfo_t sig;
proctrace(PTRACE_GETSIGINFO, pid, NULL, &sig);
printf("I quit because of the signal %d\n", sig.si_signo);
}
int
edfready(Proc *p)
{
Edf *e;
Sched *sch;
Schedq *rq;
Proc *l, *pp;
int32_t n;
if((e = edflock(p)) == nil)
return 0;
if(p->state == Wakeme && p->r){
iprint("edfready: wakeme\n");
}
if(e->d - now <= 0){
/* past deadline, arrange for next release */
if((e->flags & Sporadic) == 0){
/*
* Non sporadic processes stay true to their period;
* calculate next release time.
*/
if((n = now - e->t) > 0){
if(n < e->T)
e->t += e->T;
else
e->t = now + e->T - (n % e->T);
}
}
if(now - e->t < 0){
/* Next release is in the future, schedule it */
if(e->Timer.tt == nil || e->Timer.tf != releaseintr){
n = e->t - now;
if(n < 20)
n = 20;
e->Timer.tns = 1000LL * n;
e->Timer.tmode = Trelative;
e->Timer.tf = releaseintr;
e->Timer.ta = p;
timeradd(&e->Timer);
DPRINT("%lu edfready %d[%s], release=%lu\n",
now, p->pid, statename[p->state], e->t);
}
if(p->state == Running && (e->flags & (Yield|Yieldonblock)) == 0 && (e->flags & Extratime)){
/* If we were running, we've overrun our CPU allocation
* or missed the deadline, continue running best-effort at low priority
* Otherwise we were blocked. If we don't yield on block, we continue
* best effort
*/
DPRINT(">");
p->basepri = PriExtra;
p->fixedpri = 1;
edfunlock();
return 0; /* Stick on runq[PriExtra] */
}
DPRINT("%lu edfready %d[%s] wait release at %lu\n",
now, p->pid, statename[p->state], e->t);
p->state = Waitrelease;
edfunlock();
return 1; /* Make runnable later */
}
DPRINT("%lu edfready %d %s release now\n", now, p->pid, statename[p->state]);
/* release now */
release(p);
}
edfunlock();
DPRINT("^");
sch = procsched(p);
rq = &sch->runq[PriEdf];
/* insert in queue in earliest deadline order */
lock(&sch->l);
l = nil;
for(pp = rq->head; pp; pp = pp->rnext){
if(pp->edf->d > e->d)
break;
l = pp;
}
p->rnext = pp;
if (l == nil)
rq->head = p;
else
l->rnext = p;
if(pp == nil)
rq->tail = p;
rq->n++;
sch->nrdy++;
sch->runvec |= 1 << PriEdf;
p->priority = PriEdf;
p->readytime = machp()->ticks;
p->state = Ready;
unlock(&sch->l);
if(p->trace)
proctrace(p, SReady, 0);
return 1;
}
char *
edfadmit(Proc *p)
{
Proc *up = externup();
char *err;
Edf *e;
int i;
Proc *r;
int32_t tns;
e = p->edf;
if (e->flags & Admitted)
return "task state"; /* should never happen */
/* simple sanity checks */
if (e->T == 0)
return "T not set";
if (e->C == 0)
return "C not set";
if (e->D > e->T)
return "D > T";
if (e->D == 0) /* if D is not set, set it to T */
e->D = e->T;
if (e->C > e->D)
return "C > D";
qlock(&edfschedlock);
if (err = testschedulability(p)){
qunlock(&edfschedlock);
return err;
}
e->flags |= Admitted;
edflock(p);
if(p->trace)
proctrace(p, SAdmit, 0);
/* Look for another proc with the same period to synchronize to */
for(i=0; (r = psincref(i)) != nil; i++) {
if(r->state == Dead || r == p){
psdecref(r);
continue;
}
if (r->edf == nil || (r->edf->flags & Admitted) == 0){
psdecref(r);
continue;
}
if (r->edf->T == e->T)
break;
}
if (r == nil){
/* Can't synchronize to another proc, release now */
e->t = now;
e->d = 0;
release(p);
if (p == up){
DPRINT("%lu edfadmit self %d[%s], release now: r=%lu d=%lu t=%lu\n",
now, p->pid, statename[p->state], e->r, e->d, e->t);
/* We're already running */
edfrun(p, 1);
}else{
/* We're releasing another proc */
DPRINT("%lu edfadmit other %d[%s], release now: r=%lu d=%lu t=%lu\n",
now, p->pid, statename[p->state], e->r, e->d, e->t);
p->Timer.ta = p;
edfunlock();
qunlock(&edfschedlock);
releaseintr(nil, &p->Timer);
return nil;
}
}else{
/* Release in synch to something else */
e->t = r->edf->t;
psdecref(r);
if (p == up){
DPRINT("%lu edfadmit self %d[%s], release at %lu\n",
now, p->pid, statename[p->state], e->t);
}else{
DPRINT("%lu edfadmit other %d[%s], release at %lu\n",
now, p->pid, statename[p->state], e->t);
if(e->Timer.tt == nil){
e->Timer.tf = releaseintr;
e->Timer.ta = p;
tns = e->t - now;
if(tns < 20)
tns = 20;
e->Timer.tns = 1000LL * tns;
e->Timer.tmode = Trelative;
timeradd(&e->Timer);
}
}
}
edfunlock();
qunlock(&edfschedlock);
return nil;
}
/*
* sleep if a condition is not true. Another process will
* awaken us after it sets the condition. When we awaken
* the condition may no longer be true.
*
* we lock both the process and the rendezvous to keep r->p
* and p->r synchronized.
*/
void
sleep(Rendez *r, int (*f)(void*), void *arg)
{
Mach *m = machp();
Mpl pl;
pl = splhi();
if(m->externup->nlocks)
print("process %d sleeps with %d locks held, last lock %#p locked at pc %#p, sleep called from %#p\n",
m->externup->pid, m->externup->nlocks, m->externup->lastlock, m->externup->lastlock->_pc, getcallerpc(&r));
lock(r);
lock(&m->externup->rlock);
if(r->_p){
print("double sleep called from %#p, %d %d\n",
getcallerpc(&r), r->_p->pid, m->externup->pid);
dumpstack();
}
/*
* Wakeup only knows there may be something to do by testing
* r->p in order to get something to lock on.
* Flush that information out to memory in case the sleep is
* committed.
*/
r->_p = m->externup;
if((*f)(arg) || m->externup->notepending){
/*
* if condition happened or a note is pending
* never mind
*/
r->_p = nil;
unlock(&m->externup->rlock);
unlock(r);
} else {
/*
* now we are committed to
* change state and call scheduler
*/
if(m->externup->trace)
proctrace(m->externup, SSleep, 0);
m->externup->state = Wakeme;
m->externup->r = r;
/* statistics */
m->cs++;
procsave(m->externup);
mmuflushtlb(m->pml4->pa);
if(setlabel(&m->externup->sched)) {
/*
* here when the process is awakened
*/
procrestore(m->externup);
spllo();
} else {
/*
* here to go to sleep (i.e. stop Running)
*/
unlock(&m->externup->rlock);
unlock(r);
/*debug*/gotolabel(&m->sched);
}
}
if(m->externup->notepending) {
m->externup->notepending = 0;
splx(pl);
if(m->externup->procctl == Proc_exitme && m->externup->closingfgrp)
forceclosefgrp();
error(Eintr);
}
splx(pl);
}
void
pexit(char *exitstr, int freemem)
{
Mach *m = machp();
Proc *p;
Segment **s, **es;
int32_t utime, stime;
Waitq *wq, *f, *next;
Fgrp *fgrp;
Egrp *egrp;
Rgrp *rgrp;
Pgrp *pgrp;
Chan *dot;
if(0 && m->externup->nfullq > 0)
iprint(" %s=%d", m->externup->text, m->externup->nfullq);
if(0 && m->externup->nicc > 0)
iprint(" [%s nicc %ud tctime %ulld actime %ulld]\n",
m->externup->text, m->externup->nicc, m->externup->tctime, m->externup->actime);
if(m->externup->syscalltrace != nil)
free(m->externup->syscalltrace);
m->externup->syscalltrace = nil;
m->externup->alarm = 0;
if (m->externup->tt)
timerdel(m->externup);
if(m->externup->trace)
proctrace(m->externup, SDead, 0);
/* nil out all the resources under lock (free later) */
qlock(&m->externup->debug);
fgrp = m->externup->fgrp;
m->externup->fgrp = nil;
egrp = m->externup->egrp;
m->externup->egrp = nil;
rgrp = m->externup->rgrp;
m->externup->rgrp = nil;
pgrp = m->externup->pgrp;
m->externup->pgrp = nil;
dot = m->externup->dot;
m->externup->dot = nil;
qunlock(&m->externup->debug);
if(fgrp)
closefgrp(fgrp);
if(egrp)
closeegrp(egrp);
if(rgrp)
closergrp(rgrp);
if(dot)
cclose(dot);
if(pgrp)
closepgrp(pgrp);
/*
* if not a kernel process and have a parent,
* do some housekeeping.
*/
if(m->externup->kp == 0) {
p = m->externup->parent;
if(p == 0) {
if(exitstr == 0)
exitstr = "unknown";
//die("bootprocessdeath");
panic("boot process died: %s", exitstr);
}
while(waserror())
;
wq = smalloc(sizeof(Waitq));
poperror();
wq->w.pid = m->externup->pid;
utime = m->externup->time[TUser] + m->externup->time[TCUser];
stime = m->externup->time[TSys] + m->externup->time[TCSys];
wq->w.time[TUser] = tk2ms(utime);
wq->w.time[TSys] = tk2ms(stime);
wq->w.time[TReal] = tk2ms(sys->machptr[0]->ticks - m->externup->time[TReal]);
if(exitstr && exitstr[0])
snprint(wq->w.msg, sizeof(wq->w.msg), "%s %d: %s",
m->externup->text, m->externup->pid, exitstr);
else
wq->w.msg[0] = '\0';
lock(&p->exl);
/*
* Check that parent is still alive.
*/
if(p->pid == m->externup->parentpid && p->state != Broken) {
p->nchild--;
p->time[TCUser] += utime;
p->time[TCSys] += stime;
/*
* If there would be more than 128 wait records
* processes for my parent, then don't leave a wait
* record behind. This helps prevent badly written
* daemon processes from accumulating lots of wait
* records.
*/
if(p->nwait < 128) {
wq->next = p->waitq;
p->waitq = wq;
p->nwait++;
wq = nil;
wakeup(&p->waitr);
}
}
unlock(&p->exl);
if(wq)
free(wq);
}
if(!freemem)
addbroken(m->externup);
qlock(&m->externup->seglock);
es = &m->externup->seg[NSEG];
for(s = m->externup->seg; s < es; s++) {
if(*s) {
putseg(*s);
*s = 0;
}
}
qunlock(&m->externup->seglock);
lock(&m->externup->exl); /* Prevent my children from leaving waits */
psunhash(m->externup);
m->externup->pid = 0;
wakeup(&m->externup->waitr);
unlock(&m->externup->exl);
for(f = m->externup->waitq; f; f = next) {
next = f->next;
free(f);
}
/* release debuggers */
qlock(&m->externup->debug);
if(m->externup->pdbg) {
wakeup(&m->externup->pdbg->sleep);
m->externup->pdbg = 0;
}
qunlock(&m->externup->debug);
/* Sched must not loop for these locks */
lock(&procalloc);
lock(&pga);
stopac();
edfstop(m->externup);
m->externup->state = Moribund;
sched();
panic("pexit");
}
static Proc*
singlerunproc(void)
{
Mach *m = machp();
Schedq *rq;
Proc *p;
uint32_t start, now, skipscheds;
int i;
start = perfticks();
/* cooperative scheduling until the clock ticks */
if((p=m->readied) && p->mach==0 && p->state==Ready
&& &run.runq[Nrq-1].head == nil && &run.runq[Nrq-2].head == nil){
skipscheds++;
rq = &run.runq[p->priority];
if(0)hi("runproc going to found before loop...\n");
goto found;
}
run.preempts++;
loop:
/*
* find a process that last ran on this processor (affinity),
* or one that hasn't moved in a while (load balancing). Every
* time around the loop affinity goes down.
*/
spllo();
for(i = 0;; i++){
/*
* find the highest priority target process that this
* processor can run given affinity constraints.
*
*/
for(rq = &run.runq[Nrq-1]; rq >= run.runq; rq--){
for(p = rq->head; p; p = p->rnext){
if(p->mp == nil || p->mp == sys->machptr[m->machno]
|| (!p->wired && i > 0))
{
if(0)hi("runproc going to found inside loop...\n");
goto found;
}
}
}
/* waste time or halt the CPU */
idlehands();
/* remember how much time we're here */
now = perfticks();
m->perf.inidle += now-start;
start = now;
}
found:
splhi();
if(0)hi("runproc into found...\n");
p = dequeueproc(&run, rq, p);
if(p == nil)
{
if(0)hi("runproc p=nil :(\n");
goto loop;
}
p->state = Scheding;
if(0)hi("runproc, pm->mp = sys->machptr[m->machno]\n");
p->mp = sys->machptr[m->machno];
if(0){hi("runproc, sys->machptr[m->machno] = "); put64((uint64_t)p->mp); hi("\n");}
if(edflock(p)){
edfrun(p, rq == &run.runq[PriEdf]); /* start deadline timer and do admin */
edfunlock();
}
if(p->trace)
proctrace(p, SRun, 0);
/* avoiding warnings, this will be removed */
USED(mach0sched); USED(smprunproc);
if(0){hi("runproc, returning p ");
put64((uint64_t)p);
hi("\n");}
return p;
}