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freebsd/usr.bin/vmstat/vmstat.c
Sergey Kandaurov 2d780dbb4b Garbage collect defunct nlist(3) symbols. 
MFC after:	1 week
2012-03-22 09:47:14 +00:00

1354 lines
34 KiB
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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.
* 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/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/time.h>
#include <sys/vmmeter.h>
#include <sys/pcpu.h>
#include <vm/vm_param.h>
#include <ctype.h>
#include <devstat.h>
#include <err.h>
#include <errno.h>
#include <inttypes.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>
#include <libutil.h>
static char da[] = "da";
static struct nlist namelist[] = {
#define X_SUM 0
{ "_cnt" },
#define X_HZ 1
{ "_hz" },
#define X_STATHZ 2
{ "_stathz" },
#define X_NCHSTATS 3
{ "_nchstats" },
#define X_INTRNAMES 4
{ "_intrnames" },
#define X_SINTRNAMES 5
{ "_sintrnames" },
#define X_INTRCNT 6
{ "_intrcnt" },
#define X_SINTRCNT 7
{ "_sintrcnt" },
#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 8
#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;
#define VMSTAT_DEFAULT_LINES 20 /* Default number of `winlines'. */
volatile sig_atomic_t wresized; /* Tty resized, when non-zero. */
static int winlines = VMSTAT_DEFAULT_LINES; /* Current number of tty rows. */
static int aflag;
static int nflag;
static int Pflag;
static int hflag;
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 pcpustats(int, u_long, int);
static void devstats(void);
static void doforkst(void);
static void dointr(void);
static void dosum(void);
static void dovmstat(unsigned int, int);
static void domemstat_malloc(void);
static void domemstat_zone(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 needresize(int);
static void doresize(void);
static void printhdr(int, u_long);
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;
float f;
int reps;
char *memf, *nlistf;
char errbuf[_POSIX2_LINE_MAX];
memf = nlistf = NULL;
interval = reps = todo = 0;
maxshowdevs = 2;
hflag = isatty(1);
while ((c = getopt(argc, argv, "ac:fhHiM:mN:n:Pp:stw:z")) != -1) {
switch (c) {
case 'a':
aflag++;
break;
case 'c':
reps = atoi(optarg);
break;
case 'P':
Pflag++;
break;
case 'f':
todo |= FORKSTAT;
break;
case 'h':
hflag = 1;
break;
case 'H':
hflag = 0;
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':
/* Convert to milliseconds. */
f = atof(optarg);
interval = f * 1000;
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 (kd && Pflag)
errx(1, "Cannot use -P with crash dumps");
if (todo & VMSTAT) {
/*
* 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);
}
#define BACKWARD_COMPATIBILITY
#ifdef BACKWARD_COMPATIBILITY
if (*argv) {
f = atof(*argv);
interval = f * 1000;
if (*++argv)
reps = atoi(*argv);
}
#endif
if (interval) {
if (!reps)
reps = -1;
} else if (reps)
interval = 1 * 1000;
if (todo & FORKSTAT)
doforkst();
if (todo & MEMSTAT)
domemstat_malloc();
if (todo & ZMEMSTAT)
domemstat_zone();
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 *)calloc(1, sizeof(struct devinfo));
last.dinfo = (struct devinfo *)calloc(1, 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)
{
struct timespec sp;
(void)clock_gettime(CLOCK_MONOTONIC, &sp);
return(sp.tv_sec);
}
static void
fill_pcpu(struct pcpu ***pcpup, int* maxcpup)
{
struct pcpu **pcpu;
int maxcpu, i;
*pcpup = NULL;
if (kd == NULL)
return;
maxcpu = kvm_getmaxcpu(kd);
if (maxcpu < 0)
errx(1, "kvm_getmaxcpu: %s", kvm_geterr(kd));
pcpu = calloc(maxcpu, sizeof(struct pcpu *));
if (pcpu == NULL)
err(1, "calloc");
for (i = 0; i < maxcpu; i++) {
pcpu[i] = kvm_getpcpu(kd, i);
if (pcpu[i] == (struct pcpu *)-1)
errx(1, "kvm_getpcpu: %s", kvm_geterr(kd));
}
*maxcpup = maxcpu;
*pcpup = pcpu;
}
static void
free_pcpu(struct pcpu **pcpu, int maxcpu)
{
int i;
for (i = 0; i < maxcpu; i++)
free(pcpu[i]);
free(pcpu);
}
static void
fill_vmmeter(struct vmmeter *vmmp)
{
struct pcpu **pcpu;
int maxcpu, i;
if (kd != NULL) {
kread(X_SUM, vmmp, sizeof(*vmmp));
fill_pcpu(&pcpu, &maxcpu);
for (i = 0; i < maxcpu; i++) {
if (pcpu[i] == NULL)
continue;
#define ADD_FROM_PCPU(i, name) \
vmmp->name += pcpu[i]->pc_cnt.name
ADD_FROM_PCPU(i, v_swtch);
ADD_FROM_PCPU(i, v_trap);
ADD_FROM_PCPU(i, v_syscall);
ADD_FROM_PCPU(i, v_intr);
ADD_FROM_PCPU(i, v_soft);
ADD_FROM_PCPU(i, v_vm_faults);
ADD_FROM_PCPU(i, v_cow_faults);
ADD_FROM_PCPU(i, v_cow_optim);
ADD_FROM_PCPU(i, v_zfod);
ADD_FROM_PCPU(i, v_ozfod);
ADD_FROM_PCPU(i, v_swapin);
ADD_FROM_PCPU(i, v_swapout);
ADD_FROM_PCPU(i, v_swappgsin);
ADD_FROM_PCPU(i, v_swappgsout);
ADD_FROM_PCPU(i, v_vnodein);
ADD_FROM_PCPU(i, v_vnodeout);
ADD_FROM_PCPU(i, v_vnodepgsin);
ADD_FROM_PCPU(i, v_vnodepgsout);
ADD_FROM_PCPU(i, v_intrans);
ADD_FROM_PCPU(i, v_tfree);
ADD_FROM_PCPU(i, v_forks);
ADD_FROM_PCPU(i, v_vforks);
ADD_FROM_PCPU(i, v_rforks);
ADD_FROM_PCPU(i, v_kthreads);
ADD_FROM_PCPU(i, v_forkpages);
ADD_FROM_PCPU(i, v_vforkpages);
ADD_FROM_PCPU(i, v_rforkpages);
ADD_FROM_PCPU(i, v_kthreadpages);
#undef ADD_FROM_PCPU
}
free_pcpu(pcpu, maxcpu);
} 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_tcached);
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");
}
}
/* Determine how many cpu columns, and what index they are in kern.cp_times */
static int
getcpuinfo(u_long *maskp, int *maxidp)
{
int maxcpu;
int maxid;
int ncpus;
int i, j;
int empty;
size_t size;
long *times;
u_long mask;
if (kd != NULL)
errx(1, "not implemented");
mask = 0;
ncpus = 0;
size = sizeof(maxcpu);
mysysctl("kern.smp.maxcpus", &maxcpu, &size, NULL, 0);
if (size != sizeof(maxcpu))
errx(1, "sysctl kern.smp.maxcpus");
size = sizeof(long) * maxcpu * CPUSTATES;
times = malloc(size);
if (times == NULL)
err(1, "malloc %zd bytes", size);
mysysctl("kern.cp_times", times, &size, NULL, 0);
maxid = (size / CPUSTATES / sizeof(long)) - 1;
for (i = 0; i <= maxid; i++) {
empty = 1;
for (j = 0; empty && j < CPUSTATES; j++) {
if (times[i * CPUSTATES + j] != 0)
empty = 0;
}
if (!empty) {
mask |= (1ul << i);
ncpus++;
}
}
if (maskp)
*maskp = mask;
if (maxidp)
*maxidp = maxid;
return (ncpus);
}
static void
prthuman(u_int64_t val, int size)
{
char buf[10];
int flags;
if (size < 5 || size > 9)
errx(1, "doofus");
flags = HN_B | HN_NOSPACE | HN_DECIMAL;
humanize_number(buf, size, val, "", HN_AUTOSCALE, flags);
printf("%*s", size, buf);
}
static int hz, hdrcnt;
static long *cur_cp_times;
static long *last_cp_times;
static size_t size_cp_times;
static void
dovmstat(unsigned int interval, int reps)
{
struct vmtotal total;
time_t uptime, halfuptime;
struct devinfo *tmp_dinfo;
size_t size;
int ncpus, maxid;
u_long cpumask;
int rate_adj;
uptime = getuptime();
halfuptime = uptime / 2;
rate_adj = 1;
/*
* If the user stops the program (control-Z) and then resumes it,
* print out the header again.
*/
(void)signal(SIGCONT, needhdr);
/*
* If our standard output is a tty, then install a SIGWINCH handler
* and set wresized so that our first iteration through the main
* vmstat loop will peek at the terminal's current rows to find out
* how many lines can fit in a screenful of output.
*/
if (isatty(fileno(stdout)) != 0) {
wresized = 1;
(void)signal(SIGWINCH, needresize);
} else {
wresized = 0;
winlines = VMSTAT_DEFAULT_LINES;
}
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;
}
if (Pflag) {
ncpus = getcpuinfo(&cpumask, &maxid);
size_cp_times = sizeof(long) * (maxid + 1) * CPUSTATES;
cur_cp_times = calloc(1, size_cp_times);
last_cp_times = calloc(1, size_cp_times);
}
for (hdrcnt = 1;;) {
if (!--hdrcnt)
printhdr(ncpus, cpumask);
if (kd != NULL) {
if (kvm_getcptime(kd, cur.cp_time) < 0)
errx(1, "kvm_getcptime: %s", kvm_geterr(kd));
} 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");
}
if (Pflag) {
size = size_cp_times;
mysysctl("kern.cp_times", cur_cp_times, &size, NULL, 0);
if (size != size_cp_times)
errx(1, "cp_times 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(ncpus, cpumask);
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) * rate_adj + halfuptime) / uptime) /* round */
if (hflag) {
printf(" ");
prthuman(total.t_avm * (u_int64_t)sum.v_page_size, 7);
printf(" ");
prthuman(total.t_free * (u_int64_t)sum.v_page_size, 6);
printf(" ");
} else {
printf(" %7d ", vmstat_pgtok(total.t_avm));
printf(" %6d ", vmstat_pgtok(total.t_free));
}
(void)printf("%5lu ",
(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("%5lu ",
(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 %4lu",
(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));
if (Pflag)
pcpustats(ncpus, cpumask, maxid);
else
cpustats();
(void)printf("\n");
(void)fflush(stdout);
if (reps >= 0 && --reps <= 0)
break;
osum = sum;
uptime = interval;
rate_adj = 1000;
/*
* We round upward to avoid losing low-frequency events
* (i.e., >= 1 per interval but < 1 per millisecond).
*/
if (interval != 1)
halfuptime = (uptime + 1) / 2;
else
halfuptime = 0;
(void)usleep(interval * 1000);
}
}
static void
printhdr(int ncpus, u_long cpumask)
{
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 ");
if (Pflag) {
for (i = 0; i < ncpus; i++) {
if (cpumask & (1ul << i))
printf("cpu%-2d ", i);
}
printf("\n");
} else
printf("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");
if (Pflag) {
for (i = 0; i < ncpus; i++)
printf(" us sy id");
printf("\n");
} else
printf(" us sy id\n");
if (wresized != 0)
doresize();
hdrcnt = winlines;
}
/*
* Force a header to be prepended to the next output.
*/
static void
needhdr(int dummy __unused)
{
hdrcnt = 1;
}
/*
* When the terminal is resized, force an update of the maximum number of rows
* printed between each header repetition. Then force a new header to be
* prepended to the next output.
*/
void
needresize(int signo)
{
wresized = 1;
hdrcnt = 1;
}
/*
* Update the global `winlines' count of terminal rows.
*/
void
doresize(void)
{
int status;
struct winsize w;
for (;;) {
status = ioctl(fileno(stdout), TIOCGWINSZ, &w);
if (status == -1 && errno == EINTR)
continue;
else if (status == -1)
err(1, "ioctl");
if (w.ws_row > 3)
winlines = w.ws_row - 3;
else
winlines = VMSTAT_DEFAULT_LINES;
break;
}
/*
* Inhibit doresize() calls until we are rescheduled by SIGWINCH.
*/
wresized = 0;
}
#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 cached\n", sum.v_tcached);
(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
percent(double pct, int *over)
{
char buf[10];
int l;
l = snprintf(buf, sizeof(buf), "%.0f", pct);
if (l == 1 && *over) {
printf("%s", buf);
(*over)--;
} else
printf("%2s", buf);
if (l > 2)
(*over)++;
}
static void
cpustats(void)
{
int state, over;
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;
over = 0;
printf(" ");
percent((cur.cp_time[CP_USER] + cur.cp_time[CP_NICE]) * lpct, &over);
printf(" ");
percent((cur.cp_time[CP_SYS] + cur.cp_time[CP_INTR]) * lpct, &over);
printf(" ");
percent(cur.cp_time[CP_IDLE] * lpct, &over);
}
static void
pcpustats(int ncpus, u_long cpumask, int maxid)
{
int state, i;
double lpct, total;
long tmp;
int over;
/* devstats does this for cp_time */
for (i = 0; i <= maxid; i++) {
if ((cpumask & (1ul << i)) == 0)
continue;
for (state = 0; state < CPUSTATES; ++state) {
tmp = cur_cp_times[i * CPUSTATES + state];
cur_cp_times[i * CPUSTATES + state] -= last_cp_times[i * CPUSTATES + state];
last_cp_times[i * CPUSTATES + state] = tmp;
}
}
over = 0;
for (i = 0; i <= maxid; i++) {
if ((cpumask & (1ul << i)) == 0)
continue;
total = 0;
for (state = 0; state < CPUSTATES; ++state)
total += cur_cp_times[i * CPUSTATES + state];
if (total)
lpct = 100.0 / total;
else
lpct = 0.0;
printf(" ");
percent((cur_cp_times[i * CPUSTATES + CP_USER] +
cur_cp_times[i * CPUSTATES + CP_NICE]) * lpct, &over);
printf(" ");
percent((cur_cp_times[i * CPUSTATES + CP_SYS] +
cur_cp_times[i * CPUSTATES + CP_INTR]) * lpct, &over);
printf(" ");
percent(cur_cp_times[i * CPUSTATES + CP_IDLE] * lpct, &over);
}
}
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) {
kread(X_SINTRCNT, &intrcntlen, sizeof(intrcntlen));
kread(X_SINTRNAMES, &inamlen, sizeof(inamlen));
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", (int)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", (int)istrnamlen,
intrname, *intrcnt, *intrcnt / uptime);
intrname += strlen(intrname) + 1;
inttotal += *intrcnt++;
}
(void)printf("%-*s %20" PRIu64 " %10" PRIu64 "\n", (int)istrnamlen,
"Total", inttotal, inttotal / uptime);
}
static void
domemstat_malloc(void)
{
struct memory_type_list *mtlp;
struct memory_type *mtp;
int error, first, i;
mtlp = memstat_mtl_alloc();
if (mtlp == NULL) {
warn("memstat_mtl_alloc");
return;
}
if (kd == NULL) {
if (memstat_sysctl_malloc(mtlp, 0) < 0) {
warnx("memstat_sysctl_malloc: %s",
memstat_strerror(memstat_mtl_geterror(mtlp)));
return;
}
} else {
if (memstat_kvm_malloc(mtlp, kd) < 0) {
error = memstat_mtl_geterror(mtlp);
if (error == MEMSTAT_ERROR_KVM)
warnx("memstat_kvm_malloc: %s",
kvm_geterr(kd));
else
warnx("memstat_kvm_malloc: %s",
memstat_strerror(error));
}
}
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 %5" PRIu64 " %5" PRIu64 "K %7s %8" PRIu64 " ",
memstat_get_name(mtp), memstat_get_count(mtp),
(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);
}
static void
domemstat_zone(void)
{
struct memory_type_list *mtlp;
struct memory_type *mtp;
char name[MEMTYPE_MAXNAME + 1];
int error;
mtlp = memstat_mtl_alloc();
if (mtlp == NULL) {
warn("memstat_mtl_alloc");
return;
}
if (kd == NULL) {
if (memstat_sysctl_uma(mtlp, 0) < 0) {
warnx("memstat_sysctl_uma: %s",
memstat_strerror(memstat_mtl_geterror(mtlp)));
return;
}
} else {
if (memstat_kvm_uma(mtlp, kd) < 0) {
error = memstat_mtl_geterror(mtlp);
if (error == MEMSTAT_ERROR_KVM)
warnx("memstat_kvm_uma: %s",
kvm_geterr(kd));
else
warnx("memstat_kvm_uma: %s",
memstat_strerror(error));
}
}
printf("%-20s %6s %6s %8s %8s %8s %4s %4s\n\n", "ITEM", "SIZE",
"LIMIT", "USED", "FREE", "REQ", "FAIL", "SLEEP");
for (mtp = memstat_mtl_first(mtlp); mtp != NULL;
mtp = memstat_mtl_next(mtp)) {
strlcpy(name, memstat_get_name(mtp), MEMTYPE_MAXNAME);
strcat(name, ":");
printf("%-20s %6" PRIu64 ", %6" PRIu64 ",%8" PRIu64 ",%8" PRIu64
",%8" PRIu64 ",%4" PRIu64 ",%4" PRIu64 "\n", name,
memstat_get_size(mtp), memstat_get_countlimit(mtp),
memstat_get_count(mtp), memstat_get_free(mtp),
memstat_get_numallocs(mtp), memstat_get_failures(mtp),
memstat_get_sleeps(mtp));
}
memstat_mtl_free(mtlp);
printf("\n");
}
/*
* 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 [-afHhimPsz] [-c count] [-M core [-N system]] [-w wait]\n",
" [-n devs] [-p type,if,pass] [disks]\n");
exit(1);
}
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