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freebsd-skq/usr.bin/vmstat/vmstat.c
Sean Bruno bf96595915 Add a new column to the output of vmstat -z to indicate the number 
of times the system was forced to sleep when requesting a new allocation.

Expand the debugger hook, db_show_uma, to display these results as well.

This has proven to be very useful in out of memory situations when
it is not known why systems have become sluggish or fail in odd ways.

Reviewed by:	rwatson alc
Approved by:	scottl (mentor) peter
Obtained from:	Yahoo Inc.
2010-06-15 19:28:37 +00:00

1369 lines
35 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.
* 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/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 <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_BOOTTIME 1
{ "_boottime" },
#define X_HZ 2
{ "_hz" },
#define X_STATHZ 3
{ "_stathz" },
#define X_NCHSTATS 4
{ "_nchstats" },
#define X_INTRNAMES 5
{ "_intrnames" },
#define X_EINTRNAMES 6
{ "_eintrnames" },
#define X_INTRCNT 7
{ "_intrcnt" },
#define X_EINTRCNT 8
{ "_eintrcnt" },
#define X_KMEMSTATS 9
{ "_kmemstatistics" },
#define X_KMEMZONES 10
{ "_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 11
#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;
time_t uptime;
(void)clock_gettime(CLOCK_MONOTONIC, &sp);
uptime = sp.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_pcpu(struct pcpu ***pcpup, int* maxcpup)
{
struct pcpu **pcpu;
int maxcpu, size, 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) {
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));
}
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 %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);
}
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 %6llu, %6llu,%8llu,%8llu,%8llu,%4llu,%4llu\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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