File: [local] / src / usr.sbin / iostat / iostat.c (download)
Revision 1.47, Wed Mar 8 04:43:13 2023 UTC (15 months ago) by guenther
Branch: MAIN
CVS Tags: OPENBSD_7_5_BASE, OPENBSD_7_5, OPENBSD_7_4_BASE, OPENBSD_7_4, OPENBSD_7_3_BASE, OPENBSD_7_3, HEAD Changes since 1.46: +1 -2 lines
Delete obsolete /* ARGSUSED */ lint comments.
ok miod@ millert@
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/* $OpenBSD: iostat.c,v 1.47 2023/03/08 04:43:13 guenther Exp $ */
/* $NetBSD: iostat.c,v 1.10 1996/10/25 18:21:58 scottr Exp $ */
/*
* Copyright (c) 1996 John M. Vinopal
* 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 for the NetBSD Project
* by John M. Vinopal.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/*-
* Copyright (c) 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. 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.
*/
#include <sys/limits.h>
#include <sys/time.h>
#include <sys/sched.h>
#include <err.h>
#include <ctype.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <kvm.h>
#include "dkstats.h"
/* Defined in dkstats.c */
extern struct _disk cur, last;
extern int dk_ndrive;
/* Namelist and memory files. */
kvm_t *kd;
char *nlistf, *memf;
int hz, reps;
time_t interval;
static int todo = 0;
volatile sig_atomic_t wantheader;
#define ISSET(x, a) ((x) & (a))
#define SHOW_CPU 0x0001
#define SHOW_TTY 0x0002
#define SHOW_STATS_1 0x0004
#define SHOW_STATS_2 0x0008
#define SHOW_TOTALS 0x0080
static void cpustats(void);
static void disk_stats(double);
static void disk_stats2(double);
static void sigalarm(int);
static void sigheader(int);
static void header(void);
static void usage(void);
static void display(void);
static void selectdrives(char **);
void dkswap(void);
void dkreadstats(void);
int dkinit(int);
int
main(int argc, char *argv[])
{
struct itimerval itv;
const char *errstr;
sigset_t empty;
int ch, hdrcnt;
while ((ch = getopt(argc, argv, "Cc:dDIM:N:Tw:")) != -1)
switch(ch) {
case 'c':
reps = strtonum(optarg, 1, INT_MAX, &errstr);
if (errstr)
errx(1, "repetition count is %s", errstr);
break;
case 'C':
todo |= SHOW_CPU;
break;
case 'd':
todo |= SHOW_STATS_1;
break;
case 'D':
todo |= SHOW_STATS_2;
break;
case 'I':
todo |= SHOW_TOTALS;
break;
case 'M':
memf = optarg;
break;
case 'N':
nlistf = optarg;
break;
case 'T':
todo |= SHOW_TTY;
break;
case 'w':
interval = strtonum(optarg, 1, UINT_MAX, &errstr);
if (errstr)
errx(1, "wait is %s", errstr);
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (!ISSET(todo, SHOW_CPU | SHOW_TTY | SHOW_STATS_1 | SHOW_STATS_2))
todo |= SHOW_CPU | SHOW_TTY | SHOW_STATS_1;
dkinit(0);
if (unveil("/", "") == -1)
err(1, "unveil /");
if (unveil(NULL, NULL) == -1)
err(1, "unveil");
dkreadstats();
selectdrives(argv);
/* print a new header on sigcont */
signal(SIGCONT, sigheader);
if (interval != 0) {
if (signal(SIGALRM, sigalarm) == SIG_ERR)
err(1, "signal");
sigemptyset(&empty);
itv.it_value.tv_sec = interval;
itv.it_value.tv_usec = 0;
itv.it_interval = itv.it_value;
if (setitimer(ITIMER_REAL, &itv, NULL) == -1)
err(1, "setitimer");
}
for (hdrcnt = 1;;) {
if (!--hdrcnt || wantheader) {
header();
hdrcnt = 20;
wantheader = 0;
}
if (!ISSET(todo, SHOW_TOTALS))
dkswap();
display();
if (reps >= 0 && --reps <= 0)
break;
sigsuspend(&empty);
dkreadstats();
if (last.dk_ndrive != cur.dk_ndrive)
wantheader = 1;
}
exit(0);
}
static void
sigalarm(int signo)
{
}
static void
sigheader(int signo)
{
wantheader = 1;
}
static void
header(void)
{
int i;
static int printedheader = 0;
if (printedheader && !isatty(STDOUT_FILENO))
return;
/* Main Headers. */
if (ISSET(todo, SHOW_TTY)) {
if (ISSET(todo, SHOW_TOTALS))
printf(" tty");
else
printf(" tty");
}
if (ISSET(todo, SHOW_STATS_1))
for (i = 0; i < dk_ndrive; i++)
if (cur.dk_select[i]) {
printf(" %18.18s ", cur.dk_name[i]);
}
if (ISSET(todo, SHOW_STATS_2))
for (i = 0; i < dk_ndrive; i++)
if (cur.dk_select[i])
printf(" %17.17s ", cur.dk_name[i]);
if (ISSET(todo, SHOW_CPU))
printf(" cpu");
printf("\n");
/* Sub-Headers. */
if (ISSET(todo, SHOW_TTY)) {
if (ISSET(todo, SHOW_TOTALS))
printf(" tin tout");
else
printf(" tin tout");
}
if (ISSET(todo, SHOW_STATS_1))
for (i = 0; i < dk_ndrive; i++)
if (cur.dk_select[i]) {
if (ISSET(todo, SHOW_TOTALS))
printf(" KB/t xfr MB ");
else
printf(" KB/t t/s MB/s ");
}
if (ISSET(todo, SHOW_STATS_2))
for (i = 0; i < dk_ndrive; i++)
if (cur.dk_select[i])
printf(" KB xfr time ");
if (ISSET(todo, SHOW_CPU))
printf(" us ni sy sp in id");
printf("\n");
}
static void
disk_stats(double etime)
{
int dn;
double atime, mbps;
for (dn = 0; dn < dk_ndrive; ++dn) {
if (!cur.dk_select[dn])
continue;
/* average Kbytes per transfer. */
if (cur.dk_rxfer[dn] + cur.dk_wxfer[dn])
mbps = ((cur.dk_rbytes[dn] + cur.dk_wbytes[dn]) /
(1024.0)) / (cur.dk_rxfer[dn] + cur.dk_wxfer[dn]);
else
mbps = 0.0;
printf(" %5.2f", mbps);
/* average transfers per second. */
if (ISSET(todo, SHOW_TOTALS))
printf(" %5.0f", (cur.dk_rxfer[dn] + cur.dk_wxfer[dn]) / etime);
else
printf(" %4.0f", (cur.dk_rxfer[dn] + cur.dk_wxfer[dn]) / etime);
/* time busy in disk activity */
atime = (double)cur.dk_time[dn].tv_sec +
((double)cur.dk_time[dn].tv_usec / (double)1000000);
/* Megabytes per second. */
if (atime != 0.0)
mbps = (cur.dk_rbytes[dn] + cur.dk_wbytes[dn]) /
(double)(1024 * 1024);
else
mbps = 0;
if (ISSET(todo, SHOW_TOTALS))
printf(" %6.2f ", mbps / etime);
else
printf(" %7.2f ", mbps / etime);
}
}
static void
disk_stats2(double etime)
{
int dn;
double atime;
for (dn = 0; dn < dk_ndrive; ++dn) {
if (!cur.dk_select[dn])
continue;
/* average kbytes per second. */
printf(" %7.0f",
(cur.dk_rbytes[dn] + cur.dk_wbytes[dn]) / (1024.0) / etime);
/* average transfers per second. */
printf(" %4.0f", (cur.dk_rxfer[dn] + cur.dk_wxfer[dn]) / etime);
/* average time busy in disk activity. */
atime = (double)cur.dk_time[dn].tv_sec +
((double)cur.dk_time[dn].tv_usec / (double)1000000);
printf(" %4.2f ", atime / etime);
}
}
static void
cpustats(void)
{
int state;
double t = 0;
for (state = 0; state < CPUSTATES; ++state)
t += cur.cp_time[state];
if (!t)
t = 1.0;
/* States are generally never 100% and can use %3.0f. */
for (state = 0; state < CPUSTATES; ++state)
printf("%3.0f", 100. * cur.cp_time[state] / t);
}
static void
usage(void)
{
fprintf(stderr,
"usage: iostat [-CDdIT] [-c count] [-M core] [-N system] [-w wait] [drives]\n");
exit(1);
}
static void
display(void)
{
int i;
double etime;
/* Sum up the elapsed ticks. */
etime = 0.0;
for (i = 0; i < CPUSTATES; i++)
etime += cur.cp_time[i];
if (etime == 0.0)
etime = 1.0;
/* Convert to seconds. */
etime /= (float)hz;
/* If we're showing totals only, then don't divide by the
* system time.
*/
if (ISSET(todo, SHOW_TOTALS))
etime = 1.0;
if (ISSET(todo, SHOW_TTY)) {
if (ISSET(todo, SHOW_TOTALS))
printf("%6.0f %8.0f", cur.tk_nin / etime,
cur.tk_nout / etime);
else
printf("%4.0f %4.0f", cur.tk_nin / etime,
cur.tk_nout / etime);
}
if (ISSET(todo, SHOW_STATS_1))
disk_stats(etime);
if (ISSET(todo, SHOW_STATS_2))
disk_stats2(etime);
if (ISSET(todo, SHOW_CPU))
cpustats();
printf("\n");
fflush(stdout);
}
static void
selectdrives(char *argv[])
{
const char *errstr;
int i, ndrives;
/*
* Choose drives to be displayed. Priority goes to (in order) drives
* supplied as arguments and default drives. If everything isn't
* filled in and there are drives not taken care of, display the first
* few that fit.
*
* The backward compatibility syntax is:
* iostat [ drives ] [ interval [ count ] ]
*/
for (ndrives = 0; *argv; ++argv) {
if (isdigit((unsigned char)**argv))
break;
for (i = 0; i < dk_ndrive; i++) {
if (strcmp(cur.dk_name[i], *argv))
continue;
cur.dk_select[i] = 1;
++ndrives;
break;
}
if (i == dk_ndrive)
errx(1, "invalid interval or drive name: %s", *argv);
}
if (*argv) {
interval = strtonum(*argv, 1, UINT_MAX, &errstr);
if (errstr)
errx(1, "interval is %s", errstr);
if (*++argv) {
reps = strtonum(*argv, 1, INT_MAX, &errstr);
if (errstr)
errx(1, "repetition count is %s", errstr);
++argv;
}
}
if (*argv)
errx(1, "too many arguments");
if (interval) {
if (!reps)
reps = -1;
} else
if (reps)
interval = 1;
/* Pick up to 4 drives if none specified. */
if (ndrives == 0)
for (i = 0; i < dk_ndrive && ndrives < 4; i++) {
if (cur.dk_select[i])
continue;
cur.dk_select[i] = 1;
++ndrives;
}
}