C++ (Cpp) pmcnregs Examples

Example #1

File: pmcio.c Project: bhanug/harvey

void
pmcupdate(Mach *m)
{
	PmcCtr *p;
	int i, maxct, wk;
	PmcWait *w;

	return;
	maxct = pmcnregs();
	for (i = 0; i < maxct; i++) {
		p = &m->pmc[i];
		ilock(&m->pmclock);
		if(p->ctrset & PmcSet)
			setctr(p->ctr, i);
		if(p->ctlset & PmcSet)
			setctl(&p->PmcCtl, i);
		p->ctr = getctr(i);
		getctl(&p->PmcCtl, i);
		p->ctrset = PmcIgn;
		p->ctlset = PmcIgn;
		wk = p->stale;
		p->stale = 0;
		if(wk){
			for(w = p->wq; w != nil; w = w->next){
				p->wq = w->next;
				wakeup(&w->rend);
				pmcwclose(w);
			}
		}
		iunlock(&m->pmclock);
	}
}

Example #2

File: devpmc.c Project: qioixiy/harvey

static void
ctrdirinit(void)
{
	int nr, i;
	Dirtab *d;

	nr = pmcnregs();

	npmctab = 1 + 2*nr;
	pmctab = malloc(npmctab * sizeof(Dirtab));
	if (pmctab == nil){
		free(toptab);
		toptab = nil;
		return;
	}

	d = pmctab;
	strncpy(d->name, ".", KNAMELEN);
	mkqid(&d->qid, Qctr, 0, QTDIR);
	d->perm = DMDIR|0555;
	for (i = 1; i < nr + 1; i++) {
		d = &pmctab[i];
		snprint(d->name, KNAMELEN, "ctr%2.2ud", i - 1);
		mkqid(&d->qid, PMCQID(i - 1, Qdata), 0, 0);
		d->perm = 0600;

		d = &pmctab[nr + i];
		snprint(d->name, KNAMELEN, "ctr%2.2udctl", i - 1);
		mkqid(&d->qid, PMCQID(i - 1, Qctl), 0, 0);
		d->perm = 0600;
	}

}

Example #3

File: pmcio.c Project: bhanug/harvey

static int
setctl(PmcCtl *p, int regno)
{
	uint64_t v, e, u;
	char *toks[2];
	char str[KNAMELEN];

	if (regno >= pmcnregs())
		error("invalid reg");

	v = rdmsr(regno + PerfEvtbase);
	v &= PeEvMskH|PeEvMskL|PeCtEna|PeOS|PeUsr|PeUnMsk;
	if (p->enab != PmcCtlNullval)
		if (p->enab)
			v |= PeCtEna;
		else
			v &= ~PeCtEna;

	if (p->user != PmcCtlNullval)
		if (p->user)
			v |= PeUsr;
		else
			v &= ~PeUsr;

	if (p->os != PmcCtlNullval)
		if (p->os)
			v |= PeOS;
		else
			v &= ~PeOS;

	if (pmctrans(p) < 0)
		return -1;

	if (p->nodesc == 0) {
		memmove(str, p->descstr, KNAMELEN);
		if (tokenize(str, toks, 2) != 2)
			return -1;
		e = atoi(toks[0]);
		u = atoi(toks[1]);
		v &= ~(PeEvMskL|PeEvMskH|PeUnMsk);
		v |= SetEvMsk(v, e);
		v |= SetUMsk(v, u);
	}
	if (p->reset != PmcCtlNullval && p->reset) {
		v = 0;
		wrmsr(regno+ PerfCtrbase, 0);
		p->reset = PmcCtlNullval; /* only reset once */
	}
	wrmsr(regno+ PerfEvtbase, v);
	pmcuserenab(pmcanyenab());
	if (pmcdebug) {
		v = rdmsr(regno+ PerfEvtbase);
		print("conf pmc[%#ux]: %#llux\n", regno, v);
	}
	return 0;
}

Example #4

File: pmcio.c Project: bhanug/harvey

int
pmcanyenab(void)
{
	int i;
	PmcCtl p;

	for (i = 0; i < pmcnregs(); i++) {
		if (getctl(&p, i) < 0)
			return -1;
		if (p.enab)
			return 1;
	}

	return 0;
}

Example #5

File: devpmc.c Project: qioixiy/harvey

static void
pmcinit(void)
{
	int i, j, ncores, nr;
	Mach *mp;

	_pmcupdate = pmcupdate;
	ncores = 0;
	nr = pmcnregs();
	for(i = 0; i < MACHMAX; i++)
		if((mp = sys->machptr[i]) != nil && mp->online){
			ncores++;
			for(j = 0; j < nr; j++)
				pmcnull(&mp->pmc[j]);
		}
	topdirinit(ncores);
	ctrdirinit();
}