vmstat.c

早期freebsd实现

		(void)printf("%3lu ",
		    rate(pgtok(sum.v_pgpgin - osum.v_pgpgin)));
		(void)printf("%3lu %3lu ",
		    rate(pgtok(sum.v_pgpgout - osum.v_pgpgout)),
		    rate(pgtok(sum.v_dfree - osum.v_dfree)));
		(void)printf("%3d ", pgtok(deficit));
#endif
		(void)printf("%3lu ", rate(sum.v_scan - osum.v_scan));
		dkstats();
		(void)printf("%4lu %4lu %3lu ",
		    rate(sum.v_intr - osum.v_intr),
		    rate(sum.v_syscall - osum.v_syscall),
		    rate(sum.v_swtch - osum.v_swtch));
		cpustats();
		(void)printf("\n");
		(void)fflush(stdout);
		if (reps >= 0 && --reps <= 0)
			break;
		osum = sum;
		uptime = interval;
		/*
		 * We round upward to avoid losing low-frequency events
		 * (i.e., >= 1 per interval but < 1 per second).
		 */
		halfuptime = (uptime + 1) / 2;
		(void)sleep(interval);
	}
}

printhdr()
{
	register int i;

	(void)printf(" procs   memory     page%*s", 20, "");
	if (ndrives > 1)
		(void)printf("disks %*s  faults      cpu\n",
		   ndrives * 3 - 6, "");
	else
		(void)printf("%*s  faults      cpu\n", ndrives * 3, "");
#ifndef NEWVM
	(void)printf(" r b w   avm   fre  re at  pi  po  fr  de  sr ");
#else
	(void)printf(" r b w   avm   fre  flt  re  pi  po  fr  sr ");
#endif
	for (i = 0; i < dk_ndrive; i++)
		if (dr_select[i])
			(void)printf("%c%c ", dr_name[i][0],
			    dr_name[i][strlen(dr_name[i]) - 1]);
	(void)printf("  in   sy  cs us sy id\n");
	hdrcnt = winlines - 2;
}

/*
 * Force a header to be prepended to the next output.
 */
void
needhdr()
{

	hdrcnt = 1;
}

#ifdef notdef
void
dotimes()
{
	u_int pgintime, rectime;

	kread(X_REC, &rectime, sizeof(rectime));
	kread(X_PGIN, &pgintime, sizeof(pgintime));
	kread(X_SUM, &sum, sizeof(sum));
	(void)printf("%u reclaims, %u total time (usec)\n",
	    sum.v_pgrec, rectime);
	(void)printf("average: %u usec / reclaim\n", rectime / sum.v_pgrec);
	(void)printf("\n");
	(void)printf("%u page ins, %u total time (msec)\n",
	    sum.v_pgin, pgintime / 10);
	(void)printf("average: %8.1f msec / page in\n",
	    pgintime / (sum.v_pgin * 10.0));
}
#endif

pct(top, bot)
	long top, bot;
{
	long ans;

	if (bot == 0)
		return(0);
	ans = (quad_t)top * 100 / bot;
	return (ans);
}

#define	PCT(top, bot) pct((long)(top), (long)(bot))

#if defined(tahoe)
#include <machine/cpu.h>
#endif

void
dosum()
{
	struct nchstats nchstats;
#ifndef NEWVM
	struct xstats xstats;
#endif
	long nchtotal;
#if defined(tahoe)
	struct keystats keystats;
#endif

	kread(X_SUM, &sum, sizeof(sum));
	(void)printf("%9u cpu context switches\n", sum.v_swtch);
	(void)printf("%9u device interrupts\n", sum.v_intr);
	(void)printf("%9u software interrupts\n", sum.v_soft);
#ifdef vax
	(void)printf("%9u pseudo-dma dz interrupts\n", sum.v_pdma);
#endif
	(void)printf("%9u traps\n", sum.v_trap);
	(void)printf("%9u system calls\n", sum.v_syscall);
	(void)printf("%9u total faults taken\n", sum.v_faults);
	(void)printf("%9u swap ins\n", sum.v_swpin);
	(void)printf("%9u swap outs\n", sum.v_swpout);
	(void)printf("%9u pages swapped in\n", sum.v_pswpin / CLSIZE);
	(void)printf("%9u pages swapped out\n", sum.v_pswpout / CLSIZE);
	(void)printf("%9u page ins\n", sum.v_pageins);
	(void)printf("%9u page outs\n", sum.v_pageouts);
	(void)printf("%9u pages paged in\n", sum.v_pgpgin);
	(void)printf("%9u pages paged out\n", sum.v_pgpgout);
	(void)printf("%9u pages reactivated\n", sum.v_reactivated);
	(void)printf("%9u intransit blocking page faults\n", sum.v_intrans);
	(void)printf("%9u zero fill pages created\n", sum.v_nzfod / CLSIZE);
	(void)printf("%9u zero fill page faults\n", sum.v_zfod / CLSIZE);
	(void)printf("%9u pages examined by the clock daemon\n", sum.v_scan);
	(void)printf("%9u revolutions of the clock hand\n", sum.v_rev);
#ifdef NEWVM
	(void)printf("%9u VM object cache lookups\n", sum.v_lookups);
	(void)printf("%9u VM object hits\n", sum.v_hits);
	(void)printf("%9u total VM faults taken\n", sum.v_vm_faults);
	(void)printf("%9u copy-on-write faults\n", sum.v_cow_faults);
	(void)printf("%9u pages freed by daemon\n", sum.v_dfree);
	(void)printf("%9u pages freed by exiting processes\n", sum.v_pfree);
	(void)printf("%9u pages free\n", sum.v_free_count);
	(void)printf("%9u pages wired down\n", sum.v_wire_count);
	(void)printf("%9u pages active\n", sum.v_active_count);
	(void)printf("%9u pages inactive\n", sum.v_inactive_count);
	(void)printf("%9u bytes per page\n", sum.v_page_size);
#else
	(void)printf("%9u sequential process pages freed\n", sum.v_seqfree);
	(void)printf("%9u total reclaims (%d%% fast)\n", sum.v_pgrec,
	    PCT(sum.v_fastpgrec, sum.v_pgrec));
	(void)printf("%9u reclaims from free list\n", sum.v_pgfrec);
	(void)printf("%9u executable fill pages created\n",
	    sum.v_nexfod / CLSIZE);
	(void)printf("%9u executable fill page faults\n",
	    sum.v_exfod / CLSIZE);
	(void)printf("%9u swap text pages found in free list\n",
	    sum.v_xsfrec);
	(void)printf("%9u inode text pages found in free list\n",
	    sum.v_xifrec);
	(void)printf("%9u file fill pages created\n", sum.v_nvrfod / CLSIZE);
	(void)printf("%9u file fill page faults\n", sum.v_vrfod / CLSIZE);
	(void)printf("%9u pages freed by the clock daemon\n",
	    sum.v_dfree / CLSIZE);
#endif
	kread(X_NCHSTATS, &nchstats, sizeof(nchstats));
	nchtotal = nchstats.ncs_goodhits + nchstats.ncs_neghits +
	    nchstats.ncs_badhits + nchstats.ncs_falsehits +
	    nchstats.ncs_miss + nchstats.ncs_long;
	(void)printf("%9ld total name lookups\n", nchtotal);
	(void)printf(
	    "%9s cache hits (%d%% pos + %d%% neg) system %d%% per-process\n",
	    "", PCT(nchstats.ncs_goodhits, nchtotal),
	    PCT(nchstats.ncs_neghits, nchtotal),
	    PCT(nchstats.ncs_pass2, nchtotal));
	(void)printf("%9s deletions %d%%, falsehits %d%%, toolong %d%%\n", "",
	    PCT(nchstats.ncs_badhits, nchtotal),
	    PCT(nchstats.ncs_falsehits, nchtotal),
	    PCT(nchstats.ncs_long, nchtotal));
#ifndef NEWVM
	kread(X_XSTATS, &xstats, sizeof(xstats));
	(void)printf("%9lu total calls to xalloc (cache hits %d%%)\n",
	    xstats.alloc, PCT(xstats.alloc_cachehit, xstats.alloc));
	(void)printf("%9s sticky %lu flushed %lu unused %lu\n", "",
	    xstats.alloc_inuse, xstats.alloc_cacheflush, xstats.alloc_unused);
	(void)printf("%9lu total calls to xfree", xstats.free);
	(void)printf(" (sticky %lu cached %lu swapped %lu)\n",
	    xstats.free_inuse, xstats.free_cache, xstats.free_cacheswap);
#endif
#if defined(tahoe)
	kread(X_CKEYSTATS, &keystats, sizeof(keystats));
	(void)printf("%9d %s (free %d%% norefs %d%% taken %d%% shared %d%%)\n",
	    keystats.ks_allocs, "code cache keys allocated",
	    PCT(keystats.ks_allocfree, keystats.ks_allocs),
	    PCT(keystats.ks_norefs, keystats.ks_allocs),
	    PCT(keystats.ks_taken, keystats.ks_allocs),
	    PCT(keystats.ks_shared, keystats.ks_allocs));
	kread(X_DKEYSTATS, &keystats, sizeof(keystats));
	(void)printf("%9d %s (free %d%% norefs %d%% taken %d%% shared %d%%)\n",
	    keystats.ks_allocs, "data cache keys allocated",
	    PCT(keystats.ks_allocfree, keystats.ks_allocs),
	    PCT(keystats.ks_norefs, keystats.ks_allocs),
	    PCT(keystats.ks_taken, keystats.ks_allocs),
	    PCT(keystats.ks_shared, keystats.ks_allocs));
#endif
}

#ifdef notdef
void
doforkst()
{
	struct forkstat fks;

	kread(X_FORKSTAT, &fks, sizeof(struct forkstat));
	(void)printf("%d forks, %d pages, average %.2f\n",
	    fks.cntfork, fks.sizfork, (double)fks.sizfork / fks.cntfork);
	(void)printf("%d vforks, %d pages, average %.2f\n",
	    fks.cntvfork, fks.sizvfork, (double)fks.sizvfork / fks.cntvfork);
}
#endif

void
dkstats()
{
	register int dn, state;
	double etime;
	long tmp;

	for (dn = 0; dn < dk_ndrive; ++dn) {
		tmp = cur.xfer[dn];
		cur.xfer[dn] -= last.xfer[dn];
		last.xfer[dn] = tmp;
	}
	etime = 0;
	for (state = 0; state < CPUSTATES; ++state) {
		tmp = cur.time[state];
		cur.time[state] -= last.time[state];
		last.time[state] = tmp;
		etime += cur.time[state];
	}
	if (etime == 0)
		etime = 1;
	etime /= hz;
	for (dn = 0; dn < dk_ndrive; ++dn) {
		if (!dr_select[dn])
			continue;
		(void)printf("%2.0f ", cur.xfer[dn] / etime);
	}
}

void
cpustats()
{
	register int state;
	double pct, total;

	total = 0;
	for (state = 0; state < CPUSTATES; ++state)
		total += cur.time[state];
	if (total)
		pct = 100 / total;
	else
		pct = 0;
	(void)printf("%2.0f ", (cur.time[CP_USER] + cur.time[CP_NICE]) * pct);
	(void)printf("%2.0f ", (cur.time[CP_SYS] + cur.time[CP_INTR]) * pct);
	(void)printf("%2.0f", cur.time[CP_IDLE] * pct);
}

void
dointr()
{
	register long *intrcnt, inttotal, uptime;
	register int nintr, inamlen;
	register char *intrname;

	uptime = getuptime();
	nintr = namelist[X_EINTRCNT].n_value - namelist[X_INTRCNT].n_value;
	inamlen =
	    namelist[X_EINTRNAMES].n_value - namelist[X_INTRNAMES].n_value;
	intrcnt = malloc((size_t)nintr);
	intrname = malloc((size_t)inamlen);
	if (intrcnt == NULL || intrname == NULL) {
		(void)fprintf(stderr, "vmstat: %s.\n", strerror(errno));
		exit(1);
	}
	kread(X_INTRCNT, intrcnt, (size_t)nintr);
	kread(X_INTRNAMES, intrname, (size_t)inamlen);
	(void)printf("interrupt      total      rate\n");
	inttotal = 0;
	nintr /= sizeof(long);
	while (--nintr >= 0) {
		if (*intrcnt)
			(void)printf("%-12s %8ld %8ld\n", intrname,
			    *intrcnt, *intrcnt / uptime);
		intrname += strlen(intrname) + 1;
		inttotal += *intrcnt++;
	}
	(void)printf("Total        %8ld %8ld\n", inttotal, inttotal / uptime);
}

/*
 * These names are defined in <sys/malloc.h>.
 */
char *kmemnames[] = INITKMEMNAMES;

void
domem()
{
	register struct kmembuckets *kp;
	register struct kmemstats *ks;
	register int i, j;
	int len, size, first;
	long totuse = 0, totfree = 0, totreq = 0;
	char *name;
	struct kmemstats kmemstats[M_LAST];
	struct kmembuckets buckets[MINBUCKET + 16];

	kread(X_KMEMBUCKETS, buckets, sizeof(buckets));
	(void)printf("Memory statistics by bucket size\n");
	(void)printf(
	    "    Size   In Use   Free   Requests  HighWater  Couldfree\n");
	for (i = MINBUCKET, kp = &buckets[i]; i < MINBUCKET + 16; i++, kp++) {
		if (kp->kb_calls == 0)
			continue;
		size = 1 << i;
		(void)printf("%8d %8ld %6ld %10ld %7ld %10ld\n", size, 
			kp->kb_total - kp->kb_totalfree,
			kp->kb_totalfree, kp->kb_calls,
			kp->kb_highwat, kp->kb_couldfree);
		totfree += size * kp->kb_totalfree;
	}

	kread(X_KMEMSTAT, kmemstats, sizeof(kmemstats));
	(void)printf("\nMemory usage type by bucket size\n");
	(void)printf("    Size  Type(s)\n");
	kp = &buckets[MINBUCKET];
	for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1, kp++) {
		if (kp->kb_calls == 0)
			continue;
		first = 1;
		len = 8;
		for (i = 0, ks = &kmemstats[0]; i < M_LAST; i++, ks++) {
			if (ks->ks_calls == 0)
				continue;
			if ((ks->ks_size & j) == 0)
				continue;
			name = kmemnames[i] ? kmemnames[i] : "undefined";
			len += 2 + strlen(name);
			if (first)
				printf("%8d  %s", j, name);
			else
				printf(",");
			if (len >= 80) {
				printf("\n\t ");
				len = 10 + strlen(name);
			}
			if (!first)
				printf(" %s", name);
			first = 0;
		}
		printf("\n");
	}

	(void)printf(
	    "\nMemory statistics by type                        Type  Kern\n");
	(void)printf(
"      Type  InUse MemUse HighUse  Limit Requests Limit Limit Size(s)\n");
	for (i = 0, ks = &kmemstats[0]; i < M_LAST; i++, ks++) {
		if (ks->ks_calls == 0)
			continue;
		(void)printf("%11s%6ld%6ldK%7ldK%6ldK%9ld%5u%6u",
		    kmemnames[i] ? kmemnames[i] : "undefined",
		    ks->ks_inuse, (ks->ks_memuse + 1023) / 1024,
		    (ks->ks_maxused + 1023) / 1024,
		    (ks->ks_limit + 1023) / 1024, ks->ks_calls,
		    ks->ks_limblocks, ks->ks_mapblocks);
		first = 1;
		for (j =  1 << MINBUCKET; j < 1 << (MINBUCKET + 16); j <<= 1) {
			if ((ks->ks_size & j) == 0)
				continue;
			if (first)
				printf("  %d", j);
			else
				printf(",%d", j);
			first = 0;
		}
		printf("\n");
		totuse += ks->ks_memuse;
		totreq += ks->ks_calls;
	}
	(void)printf("\nMemory Totals:  In Use    Free    Requests\n");
	(void)printf("              %7ldK %6ldK    %8ld\n",
	     (totuse + 1023) / 1024, (totfree + 1023) / 1024, totreq);
}

/*
 * kread reads something from the kernel, given its nlist index.
 */
void
kread(nlx, addr, size)
	int nlx;
	void *addr;
	size_t size;
{
	char *sym;

	if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
		sym = namelist[nlx].n_name;
		if (*sym == '_')
			++sym;
		(void)fprintf(stderr,
		    "vmstat: symbol %s not defined\n", sym);
		exit(1);
	}
	if (kvm_read(kd, namelist[nlx].n_value, addr, size) != size) {
		sym = namelist[nlx].n_name;
		if (*sym == '_')
			++sym;
		(void)fprintf(stderr, "vmstat: %s: %s\n", sym, kvm_geterr(kd));
		exit(1);
	}
}

void
usage()
{
	(void)fprintf(stderr,
#ifndef NEWVM
	    "usage: vmstat [-fimst] [-c count] [-M core] \
[-N system] [-w wait] [disks]\n");
#else
	    "usage: vmstat [-ims] [-c count] [-M core] \
[-N system] [-w wait] [disks]\n");
#endif
	exit(1);
}