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freebsd-skq/usr.bin/vmstat/vmstat.c
rwatson 4bf88ad842 Teach vmstat -m and vmstat -z to use libmemstat(3). Certain 
statistics from -z are now a bit different due to changes in the
way statistics are now measured.  Reproduce with some amount of
accuracy the slightly obscure layouts adopted by the two kernel
sysctls.  In the future, we might want to normalize them.

GC dosysctl(), which is now no longer used.

MFC after:	1 week
2005-07-25 22:35:10 +00:00

1144 lines
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/*
* Copyright (c) 1980, 1986, 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1980, 1986, 1991, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#if 0
#ifndef lint
static char sccsid[] = "@(#)vmstat.c 8.1 (Berkeley) 6/6/93";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/uio.h>
#include <sys/namei.h>
#include <sys/malloc.h>
#include <sys/signal.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/resource.h>
#include <sys/sysctl.h>
#include <sys/vmmeter.h>
#include <vm/vm_param.h>
#include <ctype.h>
#include <devstat.h>
#include <err.h>
#include <errno.h>
#include <kvm.h>
#include <limits.h>
#include <memstat.h>
#include <nlist.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sysexits.h>
#include <time.h>
#include <unistd.h>
static char da[] = "da";
static struct nlist namelist[] = {
#define X_CPTIME 0
{ "_cp_time" },
#define X_SUM 1
{ "_cnt" },
#define X_BOOTTIME 2
{ "_boottime" },
#define X_HZ 3
{ "_hz" },
#define X_STATHZ 4
{ "_stathz" },
#define X_NCHSTATS 5
{ "_nchstats" },
#define X_INTRNAMES 6
{ "_intrnames" },
#define X_EINTRNAMES 7
{ "_eintrnames" },
#define X_INTRCNT 8
{ "_intrcnt" },
#define X_EINTRCNT 9
{ "_eintrcnt" },
#define X_KMEMSTATS 10
{ "_kmemstatistics" },
#define X_KMEMZONES 11
{ "_kmemzones" },
#ifdef notyet
#define X_DEFICIT XXX
{ "_deficit" },
#define X_REC XXX
{ "_rectime" },
#define X_PGIN XXX
{ "_pgintime" },
#define X_XSTATS XXX
{ "_xstats" },
#define X_END XXX
#else
#define X_END 12
#endif
{ "" },
};
static struct statinfo cur, last;
static int num_devices, maxshowdevs;
static long generation;
static struct device_selection *dev_select;
static int num_selected;
static struct devstat_match *matches;
static int num_matches = 0;
static int num_devices_specified, num_selections;
static long select_generation;
static char **specified_devices;
static devstat_select_mode select_mode;
static struct vmmeter sum, osum;
static int winlines = 20;
static int aflag;
static int nflag;
static kvm_t *kd;
#define FORKSTAT 0x01
#define INTRSTAT 0x02
#define MEMSTAT 0x04
#define SUMSTAT 0x08
#define TIMESTAT 0x10
#define VMSTAT 0x20
#define ZMEMSTAT 0x40
static void cpustats(void);
static void devstats(void);
static void doforkst(void);
static void domem(void);
static void dointr(void);
static void dosum(void);
static void dovmstat(unsigned int, int);
static void dozmem(void);
static void kread(int, void *, size_t);
static void kreado(int, void *, size_t, size_t);
static char *kgetstr(const char *);
static void needhdr(int);
static void printhdr(void);
static void usage(void);
static long pct(long, long);
static long getuptime(void);
static char **getdrivedata(char **);
int
main(int argc, char *argv[])
{
int c, todo;
unsigned int interval;
int reps;
char *memf, *nlistf;
char errbuf[_POSIX2_LINE_MAX];
memf = nlistf = NULL;
interval = reps = todo = 0;
maxshowdevs = 2;
while ((c = getopt(argc, argv, "ac:fiM:mN:n:p:stw:z")) != -1) {
switch (c) {
case 'a':
aflag++;
break;
case 'c':
reps = atoi(optarg);
break;
case 'f':
todo |= FORKSTAT;
break;
case 'i':
todo |= INTRSTAT;
break;
case 'M':
memf = optarg;
break;
case 'm':
todo |= MEMSTAT;
break;
case 'N':
nlistf = optarg;
break;
case 'n':
nflag = 1;
maxshowdevs = atoi(optarg);
if (maxshowdevs < 0)
errx(1, "number of devices %d is < 0",
maxshowdevs);
break;
case 'p':
if (devstat_buildmatch(optarg, &matches, &num_matches) != 0)
errx(1, "%s", devstat_errbuf);
break;
case 's':
todo |= SUMSTAT;
break;
case 't':
#ifdef notyet
todo |= TIMESTAT;
#else
errx(EX_USAGE, "sorry, -t is not (re)implemented yet");
#endif
break;
case 'w':
interval = atoi(optarg);
break;
case 'z':
todo |= ZMEMSTAT;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
if (todo == 0)
todo = VMSTAT;
if (memf != NULL) {
kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
if (kd == NULL)
errx(1, "kvm_openfiles: %s", errbuf);
}
if (kd != NULL && (c = kvm_nlist(kd, namelist)) != 0) {
if (c > 0) {
warnx("undefined symbols:");
for (c = 0;
c < (int)(sizeof(namelist)/sizeof(namelist[0]));
c++)
if (namelist[c].n_type == 0)
(void)fprintf(stderr, " %s",
namelist[c].n_name);
(void)fputc('\n', stderr);
} else
warnx("kvm_nlist: %s", kvm_geterr(kd));
exit(1);
}
if (todo & VMSTAT) {
struct winsize winsize;
/*
* Make sure that the userland devstat version matches the
* kernel devstat version. If not, exit and print a
* message informing the user of his mistake.
*/
if (devstat_checkversion(NULL) < 0)
errx(1, "%s", devstat_errbuf);
argv = getdrivedata(argv);
winsize.ws_row = 0;
(void) ioctl(STDOUT_FILENO, TIOCGWINSZ, (char *)&winsize);
if (winsize.ws_row > 0)
winlines = winsize.ws_row;
}
#define BACKWARD_COMPATIBILITY
#ifdef BACKWARD_COMPATIBILITY
if (*argv) {
interval = atoi(*argv);
if (*++argv)
reps = atoi(*argv);
}
#endif
if (interval) {
if (!reps)
reps = -1;
} else if (reps)
interval = 1;
if (todo & FORKSTAT)
doforkst();
if (todo & MEMSTAT)
domem();
if (todo & ZMEMSTAT)
dozmem();
if (todo & SUMSTAT)
dosum();
#ifdef notyet
if (todo & TIMESTAT)
dotimes();
#endif
if (todo & INTRSTAT)
dointr();
if (todo & VMSTAT)
dovmstat(interval, reps);
exit(0);
}
static int
mysysctl(const char *name, void *oldp, size_t *oldlenp,
void *newp, size_t newlen)
{
int error;
error = sysctlbyname(name, oldp, oldlenp, newp, newlen);
if (error != 0 && errno != ENOMEM)
err(1, "sysctl(%s)", name);
return (error);
}
static char **
getdrivedata(char **argv)
{
if ((num_devices = devstat_getnumdevs(NULL)) < 0)
errx(1, "%s", devstat_errbuf);
cur.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
last.dinfo = (struct devinfo *)malloc(sizeof(struct devinfo));
bzero(cur.dinfo, sizeof(struct devinfo));
bzero(last.dinfo, sizeof(struct devinfo));
if (devstat_getdevs(NULL, &cur) == -1)
errx(1, "%s", devstat_errbuf);
num_devices = cur.dinfo->numdevs;
generation = cur.dinfo->generation;
specified_devices = (char **)malloc(sizeof(char *));
for (num_devices_specified = 0; *argv; ++argv) {
if (isdigit(**argv))
break;
num_devices_specified++;
specified_devices = (char **)realloc(specified_devices,
sizeof(char *) *
num_devices_specified);
specified_devices[num_devices_specified - 1] = *argv;
}
dev_select = NULL;
if (nflag == 0 && maxshowdevs < num_devices_specified)
maxshowdevs = num_devices_specified;
/*
* People are generally only interested in disk statistics when
* they're running vmstat. So, that's what we're going to give
* them if they don't specify anything by default. We'll also give
* them any other random devices in the system so that we get to
* maxshowdevs devices, if that many devices exist. If the user
* specifies devices on the command line, either through a pattern
* match or by naming them explicitly, we will give the user only
* those devices.
*/
if ((num_devices_specified == 0) && (num_matches == 0)) {
if (devstat_buildmatch(da, &matches, &num_matches) != 0)
errx(1, "%s", devstat_errbuf);
select_mode = DS_SELECT_ADD;
} else
select_mode = DS_SELECT_ONLY;
/*
* At this point, selectdevs will almost surely indicate that the
* device list has changed, so we don't look for return values of 0
* or 1. If we get back -1, though, there is an error.
*/
if (devstat_selectdevs(&dev_select, &num_selected, &num_selections,
&select_generation, generation, cur.dinfo->devices,
num_devices, matches, num_matches, specified_devices,
num_devices_specified, select_mode,
maxshowdevs, 0) == -1)
errx(1, "%s", devstat_errbuf);
return(argv);
}
static long
getuptime(void)
{
static struct timeval boottime;
static time_t now;
time_t uptime;
if (boottime.tv_sec == 0) {
if (kd != NULL) {
kread(X_BOOTTIME, &boottime, sizeof(boottime));
} else {
size_t size;
size = sizeof(boottime);
mysysctl("kern.boottime", &boottime, &size, NULL, 0);
if (size != sizeof(boottime))
errx(1, "kern.boottime size mismatch");
}
}
(void)time(&now);
uptime = now - boottime.tv_sec;
if (uptime <= 0 || uptime > 60*60*24*365*10)
errx(1, "time makes no sense; namelist must be wrong");
return(uptime);
}
static void
fill_vmmeter(struct vmmeter *vmmp)
{
if (kd != NULL) {
kread(X_SUM, vmmp, sizeof(*vmmp));
} else {
size_t size = sizeof(unsigned int);
#define GET_VM_STATS(cat, name) \
mysysctl("vm.stats." #cat "." #name, &vmmp->name, &size, NULL, 0)
/* sys */
GET_VM_STATS(sys, v_swtch);
GET_VM_STATS(sys, v_trap);
GET_VM_STATS(sys, v_syscall);
GET_VM_STATS(sys, v_intr);
GET_VM_STATS(sys, v_soft);
/* vm */
GET_VM_STATS(vm, v_vm_faults);
GET_VM_STATS(vm, v_cow_faults);
GET_VM_STATS(vm, v_cow_optim);
GET_VM_STATS(vm, v_zfod);
GET_VM_STATS(vm, v_ozfod);
GET_VM_STATS(vm, v_swapin);
GET_VM_STATS(vm, v_swapout);
GET_VM_STATS(vm, v_swappgsin);
GET_VM_STATS(vm, v_swappgsout);
GET_VM_STATS(vm, v_vnodein);
GET_VM_STATS(vm, v_vnodeout);
GET_VM_STATS(vm, v_vnodepgsin);
GET_VM_STATS(vm, v_vnodepgsout);
GET_VM_STATS(vm, v_intrans);
GET_VM_STATS(vm, v_reactivated);
GET_VM_STATS(vm, v_pdwakeups);
GET_VM_STATS(vm, v_pdpages);
GET_VM_STATS(vm, v_dfree);
GET_VM_STATS(vm, v_pfree);
GET_VM_STATS(vm, v_tfree);
GET_VM_STATS(vm, v_page_size);
GET_VM_STATS(vm, v_page_count);
GET_VM_STATS(vm, v_free_reserved);
GET_VM_STATS(vm, v_free_target);
GET_VM_STATS(vm, v_free_min);
GET_VM_STATS(vm, v_free_count);
GET_VM_STATS(vm, v_wire_count);
GET_VM_STATS(vm, v_active_count);
GET_VM_STATS(vm, v_inactive_target);
GET_VM_STATS(vm, v_inactive_count);
GET_VM_STATS(vm, v_cache_count);
GET_VM_STATS(vm, v_cache_min);
GET_VM_STATS(vm, v_cache_max);
GET_VM_STATS(vm, v_pageout_free_min);
GET_VM_STATS(vm, v_interrupt_free_min);
/*GET_VM_STATS(vm, v_free_severe);*/
GET_VM_STATS(vm, v_forks);
GET_VM_STATS(vm, v_vforks);
GET_VM_STATS(vm, v_rforks);
GET_VM_STATS(vm, v_kthreads);
GET_VM_STATS(vm, v_forkpages);
GET_VM_STATS(vm, v_vforkpages);
GET_VM_STATS(vm, v_rforkpages);
GET_VM_STATS(vm, v_kthreadpages);
#undef GET_VM_STATS
}
}
static void
fill_vmtotal(struct vmtotal *vmtp)
{
if (kd != NULL) {
/* XXX fill vmtp */
errx(1, "not implemented");
} else {
size_t size = sizeof(*vmtp);
mysysctl("vm.vmtotal", vmtp, &size, NULL, 0);
if (size != sizeof(*vmtp))
errx(1, "vm.total size mismatch");
}
}
static int hz, hdrcnt;
static void
dovmstat(unsigned int interval, int reps)
{
struct vmtotal total;
time_t uptime, halfuptime;
struct devinfo *tmp_dinfo;
size_t size;
uptime = getuptime();
halfuptime = uptime / 2;
(void)signal(SIGCONT, needhdr);
if (kd != NULL) {
if (namelist[X_STATHZ].n_type != 0 &&
namelist[X_STATHZ].n_value != 0)
kread(X_STATHZ, &hz, sizeof(hz));
if (!hz)
kread(X_HZ, &hz, sizeof(hz));
} else {
struct clockinfo clockrate;
size = sizeof(clockrate);
mysysctl("kern.clockrate", &clockrate, &size, NULL, 0);
if (size != sizeof(clockrate))
errx(1, "clockrate size mismatch");
hz = clockrate.hz;
}
for (hdrcnt = 1;;) {
if (!--hdrcnt)
printhdr();
if (kd != NULL) {
kread(X_CPTIME, cur.cp_time, sizeof(cur.cp_time));
} else {
size = sizeof(cur.cp_time);
mysysctl("kern.cp_time", &cur.cp_time, &size, NULL, 0);
if (size != sizeof(cur.cp_time))
errx(1, "cp_time size mismatch");
}
tmp_dinfo = last.dinfo;
last.dinfo = cur.dinfo;
cur.dinfo = tmp_dinfo;
last.snap_time = cur.snap_time;
/*
* Here what we want to do is refresh our device stats.
* getdevs() returns 1 when the device list has changed.
* If the device list has changed, we want to go through
* the selection process again, in case a device that we
* were previously displaying has gone away.
*/
switch (devstat_getdevs(NULL, &cur)) {
case -1:
errx(1, "%s", devstat_errbuf);
break;
case 1: {
int retval;
num_devices = cur.dinfo->numdevs;
generation = cur.dinfo->generation;
retval = devstat_selectdevs(&dev_select, &num_selected,
&num_selections, &select_generation,
generation, cur.dinfo->devices,
num_devices, matches, num_matches,
specified_devices,
num_devices_specified, select_mode,
maxshowdevs, 0);
switch (retval) {
case -1:
errx(1, "%s", devstat_errbuf);
break;
case 1:
printhdr();
break;
default:
break;
}
}
default:
break;
}
fill_vmmeter(&sum);
fill_vmtotal(&total);
(void)printf("%2d %1d %1d",
total.t_rq - 1, total.t_dw + total.t_pw, total.t_sw);
#define vmstat_pgtok(a) ((a) * (sum.v_page_size >> 10))
#define rate(x) (((x) + halfuptime) / uptime) /* round */
(void)printf(" %7ld %6ld ", (long)vmstat_pgtok(total.t_avm),
(long)vmstat_pgtok(total.t_free));
(void)printf("%4lu ",
(unsigned long)rate(sum.v_vm_faults - osum.v_vm_faults));
(void)printf("%3lu ",
(unsigned long)rate(sum.v_reactivated - osum.v_reactivated));
(void)printf("%3lu ",
(unsigned long)rate(sum.v_swapin + sum.v_vnodein -
(osum.v_swapin + osum.v_vnodein)));
(void)printf("%3lu ",
(unsigned long)rate(sum.v_swapout + sum.v_vnodeout -
(osum.v_swapout + osum.v_vnodeout)));
(void)printf("%3lu ",
(unsigned long)rate(sum.v_tfree - osum.v_tfree));
(void)printf("%3lu ",
(unsigned long)rate(sum.v_pdpages - osum.v_pdpages));
devstats();
(void)printf("%4lu %4lu %3lu ",
(unsigned long)rate(sum.v_intr - osum.v_intr),
(unsigned long)rate(sum.v_syscall - osum.v_syscall),
(unsigned long)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).
*/
if (interval != 1)
halfuptime = (uptime + 1) / 2;
else
halfuptime = 0;
(void)sleep(interval);
}
}
static void
printhdr(void)
{
int i, num_shown;
num_shown = (num_selected < maxshowdevs) ? num_selected : maxshowdevs;
(void)printf(" procs memory page%*s", 19, "");
if (num_shown > 1)
(void)printf(" disks %*s", num_shown * 4 - 7, "");
else if (num_shown == 1)
(void)printf("disk");
(void)printf(" faults cpu\n");
(void)printf(" r b w avm fre flt re pi po fr sr ");
for (i = 0; i < num_devices; i++)
if ((dev_select[i].selected)
&& (dev_select[i].selected <= maxshowdevs))
(void)printf("%c%c%d ", dev_select[i].device_name[0],
dev_select[i].device_name[1],
dev_select[i].unit_number);
(void)printf(" in sy cs us sy id\n");
hdrcnt = winlines - 2;
}
/*
* Force a header to be prepended to the next output.
*/
static void
needhdr(int dummy __unused)
{
hdrcnt = 1;
}
#ifdef notyet
static void
dotimes(void)
{
unsigned 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
static long
pct(long top, long 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))
static void
dosum(void)
{
struct nchstats lnchstats;
long nchtotal;
fill_vmmeter(&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);
(void)printf("%9u traps\n", sum.v_trap);
(void)printf("%9u system calls\n", sum.v_syscall);
(void)printf("%9u kernel threads created\n", sum.v_kthreads);
(void)printf("%9u fork() calls\n", sum.v_forks);
(void)printf("%9u vfork() calls\n", sum.v_vforks);
(void)printf("%9u rfork() calls\n", sum.v_rforks);
(void)printf("%9u swap pager pageins\n", sum.v_swapin);
(void)printf("%9u swap pager pages paged in\n", sum.v_swappgsin);
(void)printf("%9u swap pager pageouts\n", sum.v_swapout);
(void)printf("%9u swap pager pages paged out\n", sum.v_swappgsout);
(void)printf("%9u vnode pager pageins\n", sum.v_vnodein);
(void)printf("%9u vnode pager pages paged in\n", sum.v_vnodepgsin);
(void)printf("%9u vnode pager pageouts\n", sum.v_vnodeout);
(void)printf("%9u vnode pager pages paged out\n", sum.v_vnodepgsout);
(void)printf("%9u page daemon wakeups\n", sum.v_pdwakeups);
(void)printf("%9u pages examined by the page daemon\n", sum.v_pdpages);
(void)printf("%9u pages reactivated\n", sum.v_reactivated);
(void)printf("%9u copy-on-write faults\n", sum.v_cow_faults);
(void)printf("%9u copy-on-write optimized faults\n", sum.v_cow_optim);
(void)printf("%9u zero fill pages zeroed\n", sum.v_zfod);
(void)printf("%9u zero fill pages prezeroed\n", sum.v_ozfod);
(void)printf("%9u intransit blocking page faults\n", sum.v_intrans);
(void)printf("%9u total VM faults taken\n", sum.v_vm_faults);
(void)printf("%9u pages affected by kernel thread creation\n", sum.v_kthreadpages);
(void)printf("%9u pages affected by fork()\n", sum.v_forkpages);
(void)printf("%9u pages affected by vfork()\n", sum.v_vforkpages);
(void)printf("%9u pages affected by rfork()\n", sum.v_rforkpages);
(void)printf("%9u pages freed\n", sum.v_tfree);
(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 active\n", sum.v_active_count);
(void)printf("%9u pages inactive\n", sum.v_inactive_count);
(void)printf("%9u pages in VM cache\n", sum.v_cache_count);
(void)printf("%9u pages wired down\n", sum.v_wire_count);
(void)printf("%9u pages free\n", sum.v_free_count);
(void)printf("%9u bytes per page\n", sum.v_page_size);
if (kd != NULL) {
kread(X_NCHSTATS, &lnchstats, sizeof(lnchstats));
} else {
size_t size = sizeof(lnchstats);
mysysctl("vfs.cache.nchstats", &lnchstats, &size, NULL, 0);
if (size != sizeof(lnchstats))
errx(1, "vfs.cache.nchstats size mismatch");
}
nchtotal = lnchstats.ncs_goodhits + lnchstats.ncs_neghits +
lnchstats.ncs_badhits + lnchstats.ncs_falsehits +
lnchstats.ncs_miss + lnchstats.ncs_long;
(void)printf("%9ld total name lookups\n", nchtotal);
(void)printf(
"%9s cache hits (%ld%% pos + %ld%% neg) system %ld%% per-directory\n",
"", PCT(lnchstats.ncs_goodhits, nchtotal),
PCT(lnchstats.ncs_neghits, nchtotal),
PCT(lnchstats.ncs_pass2, nchtotal));
(void)printf("%9s deletions %ld%%, falsehits %ld%%, toolong %ld%%\n", "",
PCT(lnchstats.ncs_badhits, nchtotal),
PCT(lnchstats.ncs_falsehits, nchtotal),
PCT(lnchstats.ncs_long, nchtotal));
}
static void
doforkst(void)
{
fill_vmmeter(&sum);
(void)printf("%u forks, %u pages, average %.2f\n",
sum.v_forks, sum.v_forkpages,
sum.v_forks == 0 ? 0.0 :
(double)sum.v_forkpages / sum.v_forks);
(void)printf("%u vforks, %u pages, average %.2f\n",
sum.v_vforks, sum.v_vforkpages,
sum.v_vforks == 0 ? 0.0 :
(double)sum.v_vforkpages / sum.v_vforks);
(void)printf("%u rforks, %u pages, average %.2f\n",
sum.v_rforks, sum.v_rforkpages,
sum.v_rforks == 0 ? 0.0 :
(double)sum.v_rforkpages / sum.v_rforks);
}
static void
devstats(void)
{
int dn, state;
long double transfers_per_second;
long double busy_seconds;
long tmp;
for (state = 0; state < CPUSTATES; ++state) {
tmp = cur.cp_time[state];
cur.cp_time[state] -= last.cp_time[state];
last.cp_time[state] = tmp;
}
busy_seconds = cur.snap_time - last.snap_time;
for (dn = 0; dn < num_devices; dn++) {
int di;
if ((dev_select[dn].selected == 0)
|| (dev_select[dn].selected > maxshowdevs))
continue;
di = dev_select[dn].position;
if (devstat_compute_statistics(&cur.dinfo->devices[di],
&last.dinfo->devices[di], busy_seconds,
DSM_TRANSFERS_PER_SECOND, &transfers_per_second,
DSM_NONE) != 0)
errx(1, "%s", devstat_errbuf);
(void)printf("%3.0Lf ", transfers_per_second);
}
}
static void
cpustats(void)
{
int state;
double lpct, total;
total = 0;
for (state = 0; state < CPUSTATES; ++state)
total += cur.cp_time[state];
if (total)
lpct = 100.0 / total;
else
lpct = 0.0;
(void)printf("%2.0f ", (cur.cp_time[CP_USER] +
cur.cp_time[CP_NICE]) * lpct);
(void)printf("%2.0f ", (cur.cp_time[CP_SYS] +
cur.cp_time[CP_INTR]) * lpct);
(void)printf("%2.0f", cur.cp_time[CP_IDLE] * lpct);
}
static void
dointr(void)
{
unsigned long *intrcnt, uptime;
uint64_t inttotal;
size_t clen, inamlen, intrcntlen, istrnamlen;
unsigned int i, nintr;
char *intrname, *tintrname;
uptime = getuptime();
if (kd != NULL) {
intrcntlen = namelist[X_EINTRCNT].n_value -
namelist[X_INTRCNT].n_value;
inamlen = namelist[X_EINTRNAMES].n_value -
namelist[X_INTRNAMES].n_value;
if ((intrcnt = malloc(intrcntlen)) == NULL ||
(intrname = malloc(inamlen)) == NULL)
err(1, "malloc()");
kread(X_INTRCNT, intrcnt, intrcntlen);
kread(X_INTRNAMES, intrname, inamlen);
} else {
for (intrcnt = NULL, intrcntlen = 1024; ; intrcntlen *= 2) {
if ((intrcnt = reallocf(intrcnt, intrcntlen)) == NULL)
err(1, "reallocf()");
if (mysysctl("hw.intrcnt",
intrcnt, &intrcntlen, NULL, 0) == 0)
break;
}
for (intrname = NULL, inamlen = 1024; ; inamlen *= 2) {
if ((intrname = reallocf(intrname, inamlen)) == NULL)
err(1, "reallocf()");
if (mysysctl("hw.intrnames",
intrname, &inamlen, NULL, 0) == 0)
break;
}
}
nintr = intrcntlen / sizeof(unsigned long);
tintrname = intrname;
istrnamlen = strlen("interrupt");
for (i = 0; i < nintr; i++) {
clen = strlen(tintrname);
if (clen > istrnamlen)
istrnamlen = clen;
tintrname += clen + 1;
}
(void)printf("%-*s %20s %10s\n", istrnamlen, "interrupt", "total",
"rate");
inttotal = 0;
for (i = 0; i < nintr; i++) {
if (intrname[0] != '\0' && (*intrcnt != 0 || aflag))
(void)printf("%-*s %20lu %10lu\n", istrnamlen, intrname,
*intrcnt, *intrcnt / uptime);
intrname += strlen(intrname) + 1;
inttotal += *intrcnt++;
}
(void)printf("%-*s %20llu %10llu\n", istrnamlen, "Total",
(long long)inttotal, (long long)(inttotal / uptime));
}
/*
* Query libmemstat(3) for information on malloc(9).
*/
static void
domemstat_malloc(void)
{
struct memory_type_list *mtlp;
struct memory_type *mtp;
int first, i;
mtlp = memstat_mtl_alloc();
if (mtlp == NULL) {
warn("memstat_mtl_alloc");
return;
}
if (memstat_sysctl_malloc(mtlp, 0) < 0) {
warnx("memstat_sysctl_malloc: %s",
memstat_strerror(memstat_mtl_geterror(mtlp)));
return;
}
printf("\n");
printf("%13s %5s %6s %7s %8s Size(s)\n", "Type", "InUse", "MemUse",
"HighUse", "Requests");
for (mtp = memstat_mtl_first(mtlp); mtp != NULL;
mtp = memstat_mtl_next(mtp)) {
if (memstat_get_numallocs(mtp) == 0 &&
memstat_get_count(mtp) == 0)
continue;
printf("%13s %5lld %5lldK %7s %8lld ",
memstat_get_name(mtp), memstat_get_count(mtp),
((int64_t)memstat_get_bytes(mtp) + 1023) / 1024, "-",
memstat_get_numallocs(mtp));
first = 1;
for (i = 0; i < 32; i++) {
if (memstat_get_sizemask(mtp) & (1 << i)) {
if (!first)
printf(",");
printf("%d", 1 << (i + 4));
first = 0;
}
}
printf("\n");
}
memstat_mtl_free(mtlp);
}
/*
* Query libmemstat(3) for information on uma(9).
*/
static void
domemstat_zone(void)
{
struct memory_type_list *mtlp;
struct memory_type *mtp;
char name[MEMTYPE_MAXNAME + 1];
mtlp = memstat_mtl_alloc();
if (mtlp == NULL) {
warn("memstat_mtl_alloc");
return;
}
if (memstat_sysctl_uma(mtlp, 0) < 0) {
warnx("memstat_sysctl_uma: %s",
memstat_strerror(memstat_mtl_geterror(mtlp)));
return;
}
printf("\n");
printf("%-15s %-8s %-9s %-7s %-5s %-8s\n\n", "ITEM", "SIZE", "LIMIT",
"USED", "FREE", "REQUESTS");
for (mtp = memstat_mtl_first(mtlp); mtp != NULL;
mtp = memstat_mtl_next(mtp)) {
strlcpy(name, memstat_get_name(mtp), MEMTYPE_MAXNAME);
strcat(name, ":");
printf("%-15s %4llu, %8llu, %7llu, %6llu, %8llu\n", name,
memstat_get_size(mtp), memstat_get_countlimit(mtp),
memstat_get_count(mtp), memstat_get_free(mtp),
memstat_get_numallocs(mtp));
}
memstat_mtl_free(mtlp);
printf("\n");
}
/*
* domem() replicates the kernel implementation of kern.malloc by inspecting
* kernel data structures, which is appropriate for use on a core dump.
* domem() must identify the set of malloc types, walk the list, and coalesce
* per-CPU state to report. It relies on direct access to internal kernel
* data structures that have a fragile (and intentionally unexposed) ABI.
* This logic should not be used by live monitoring tools, which should
* instead rely solely on the sysctl interface.
*/
static void
domem(void)
{
struct malloc_type_stats mts_local, *mts;
struct malloc_type_internal mti;
struct malloc_type type;
int i;
if (kd == NULL) {
domemstat_malloc();
return;
}
kread(X_KMEMSTATS, &type.ks_next, sizeof(type.ks_next));
(void)printf("\n Type InUse MemUse HighUse Requests"
" Size(s)\n");
do {
/* XXX this should be exported in sys/malloc.h */
struct {
int kz_size;
char *kz_name;
/* uma_zone_t */ void *kz_zone;
} kz;
size_t kmemzonenum;
char *str;
int first;
if (kvm_read(kd, (u_long)type.ks_next, &type, sizeof(type)) !=
sizeof(type))
errx(1, "%s: %p: %s", __func__, type.ks_next,
kvm_geterr(kd));
if (kvm_read(kd, (u_long)type.ks_handle, &mti, sizeof(mti)) !=
sizeof(mti))
errx(1, "%s: %p: %s", __func__, type.ks_handle,
kvm_geterr(kd));
bzero(&mts_local, sizeof(mts_local));
for (i = 0; i < MAXCPU; i++) {
mts = &mti.mti_stats[i];
mts_local.mts_memalloced += mts->mts_memalloced;
mts_local.mts_memfreed += mts->mts_memfreed;
mts_local.mts_numallocs += mts->mts_numallocs;
mts_local.mts_numfrees += mts->mts_numfrees;
mts_local.mts_size |= mts->mts_size;
}
if (mts_local.mts_numallocs == 0)
continue;
/*
* Unlike in kern_malloc.c, we don't mask inter-CPU races, as * vmstat on a core is likely for debugging purposes.
*/
str = kgetstr(type.ks_shortdesc);
(void)printf("%13s%6lu%6luK -%9llu",
str,
mts_local.mts_numallocs - mts_local.mts_numfrees,
((mts_local.mts_memalloced - mts_local.mts_memfreed) +
1023) / 1024,
mts_local.mts_numallocs);
free(str);
for (kmemzonenum = 0, first = 1; ; kmemzonenum++) {
kreado(X_KMEMZONES, &kz, sizeof(kz),
kmemzonenum * sizeof(kz));
if (kz.kz_name == NULL) {
(void)printf("\n");
break;
}
if (!(mts_local.mts_size & (1 << kmemzonenum)))
continue;
if (first)
(void)printf(" ");
else
(void)printf(",");
first = 0;
str = kgetstr(kz.kz_name);
(void)printf("%s", str);
free(str);
}
} while (type.ks_next != NULL);
}
static void
dozmem(void)
{
if (kd != NULL)
errx(1, "not implemented");
domemstat_zone();
}
/*
* kread reads something from the kernel, given its nlist index.
*/
static void
kreado(int nlx, void *addr, size_t size, size_t offset)
{
const char *sym;
if (namelist[nlx].n_type == 0 || namelist[nlx].n_value == 0) {
sym = namelist[nlx].n_name;
if (*sym == '_')
++sym;
errx(1, "symbol %s not defined", sym);
}
if ((size_t)kvm_read(kd, namelist[nlx].n_value + offset, addr,
size) != size) {
sym = namelist[nlx].n_name;
if (*sym == '_')
++sym;
errx(1, "%s: %s", sym, kvm_geterr(kd));
}
}
static void
kread(int nlx, void *addr, size_t size)
{
kreado(nlx, addr, size, 0);
}
static char *
kgetstr(const char *strp)
{
int n = 0, size = 1;
char *ret = NULL;
do {
if (size == n + 1) {
ret = realloc(ret, size);
if (ret == NULL)
err(1, "%s: realloc", __func__);
size *= 2;
}
if (kvm_read(kd, (u_long)strp + n, &ret[n], 1) != 1)
errx(1, "%s: %s", __func__, kvm_geterr(kd));
} while (ret[n++] != '\0');
return (ret);
}
static void
usage(void)
{
(void)fprintf(stderr, "%s%s",
"usage: vmstat [-afimsz] [-c count] [-M core [-N system]] [-w wait]\n",
" [-n devs] [-p type,if,pass] [disks]\n");
exit(1);
}
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