565 lines
14 KiB
C
565 lines
14 KiB
C
/* $NetBSD: iostat.c,v 1.60 2011/08/30 19:06:06 joerg Exp $ */
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/*
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* Copyright (c) 1996 John M. Vinopal
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project
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* by John M. Vinopal.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1986, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1986, 1991, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)iostat.c 8.3 (Berkeley) 4/28/95";
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#else
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__RCSID("$NetBSD: iostat.c,v 1.60 2011/08/30 19:06:06 joerg Exp $");
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#endif
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#endif /* not lint */
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <sys/sched.h>
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#include <sys/time.h>
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#include <err.h>
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#include <ctype.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <math.h>
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#include "drvstats.h"
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/* Namelist and memory files. */
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char *nlistf, *memf;
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int hz;
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static int reps, interval;
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static int todo = 0;
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static int defdrives;
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static int winlines = 20;
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static int wincols = 80;
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#define MAX(a,b) (((a)>(b))?(a):(b))
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#define ISSET(x, a) ((x) & (a))
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#define SHOW_CPU (1<<0)
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#define SHOW_TTY (1<<1)
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#define SHOW_STATS_1 (1<<2)
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#define SHOW_STATS_2 (1<<3)
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#define SHOW_STATS_X (1<<4)
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#define SHOW_TOTALS (1<<7)
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#define SHOW_STATS_ALL (SHOW_STATS_1 | SHOW_STATS_2 | SHOW_STATS_X)
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static void cpustats(void);
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static void drive_stats(double);
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static void drive_stats2(double);
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static void drive_statsx(double);
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static void sig_header(int);
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static volatile int do_header;
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static void header(void);
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__dead static void usage(void);
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static void display(void);
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static int selectdrives(int, char *[]);
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int
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main(int argc, char *argv[])
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{
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int ch, hdrcnt, ndrives, lines;
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struct timespec tv;
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struct ttysize ts;
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while ((ch = getopt(argc, argv, "Cc:dDIM:N:Tw:x")) != -1)
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switch (ch) {
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case 'c':
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if ((reps = atoi(optarg)) <= 0)
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errx(1, "repetition count <= 0.");
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break;
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case 'C':
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todo |= SHOW_CPU;
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break;
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case 'd':
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todo &= ~SHOW_STATS_ALL;
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todo |= SHOW_STATS_1;
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break;
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case 'D':
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todo &= ~SHOW_STATS_ALL;
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todo |= SHOW_STATS_2;
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break;
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case 'I':
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todo |= SHOW_TOTALS;
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break;
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case 'M':
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memf = optarg;
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break;
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case 'N':
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nlistf = optarg;
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break;
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case 'T':
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todo |= SHOW_TTY;
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break;
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case 'w':
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if ((interval = atoi(optarg)) <= 0)
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errx(1, "interval <= 0.");
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break;
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case 'x':
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todo &= ~SHOW_STATS_ALL;
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todo |= SHOW_STATS_X;
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break;
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (!ISSET(todo, SHOW_CPU | SHOW_TTY | SHOW_STATS_ALL))
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todo |= SHOW_CPU | SHOW_TTY | SHOW_STATS_1;
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if (ISSET(todo, SHOW_STATS_X)) {
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todo &= ~(SHOW_CPU | SHOW_TTY | SHOW_STATS_ALL);
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todo |= SHOW_STATS_X;
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}
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if (ioctl(STDOUT_FILENO, TIOCGSIZE, &ts) != -1) {
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if (ts.ts_lines)
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winlines = ts.ts_lines;
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if (ts.ts_cols)
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wincols = ts.ts_cols;
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}
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defdrives = wincols;
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if (ISSET(todo, SHOW_CPU))
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defdrives -= 16; /* XXX magic number */
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if (ISSET(todo, SHOW_TTY))
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defdrives -= 9; /* XXX magic number */
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defdrives /= 18; /* XXX magic number */
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drvinit(0);
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cpureadstats();
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drvreadstats();
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ndrives = selectdrives(argc, argv);
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if (ndrives == 0) {
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/* No drives are selected. No need to show drive stats. */
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todo &= ~SHOW_STATS_ALL;
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if (todo == 0)
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errx(1, "no drives");
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}
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if (ISSET(todo, SHOW_STATS_X))
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lines = ndrives;
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else
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lines = 1;
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tv.tv_sec = interval;
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tv.tv_nsec = 0;
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/* print a new header on sigcont */
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(void)signal(SIGCONT, sig_header);
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for (hdrcnt = 1;;) {
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if (do_header || lines > 1 || (hdrcnt -= lines) <= 0) {
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do_header = 0;
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header();
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hdrcnt = winlines - 4;
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}
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if (!ISSET(todo, SHOW_TOTALS)) {
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cpuswap();
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drvswap();
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tkswap();
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}
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display();
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if (reps >= 0 && --reps <= 0)
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break;
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nanosleep(&tv, NULL);
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cpureadstats();
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drvreadstats();
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}
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exit(0);
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}
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static void
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sig_header(int signo)
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{
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do_header = 1;
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}
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static void
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header(void)
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{
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size_t i;
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/* Main Headers. */
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if (ISSET(todo, SHOW_STATS_X)) {
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if (ISSET(todo, SHOW_TOTALS)) {
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(void)printf(
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"device read KB/t xfr time MB ");
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(void)printf(" write KB/t xfr time MB\n");
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} else {
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(void)printf(
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"device read KB/t r/s time MB/s");
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(void)printf(" write KB/t w/s time MB/s\n");
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}
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return;
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}
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if (ISSET(todo, SHOW_TTY))
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(void)printf(" tty");
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if (ISSET(todo, SHOW_STATS_1)) {
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for (i = 0; i < ndrive; i++)
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if (cur.select[i])
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(void)printf(" %9.9s ", cur.name[i]);
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}
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if (ISSET(todo, SHOW_STATS_2)) {
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for (i = 0; i < ndrive; i++)
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if (cur.select[i])
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(void)printf(" %9.9s ", cur.name[i]);
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}
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if (ISSET(todo, SHOW_CPU))
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(void)printf(" CPU");
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printf("\n");
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/* Sub-Headers. */
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if (ISSET(todo, SHOW_TTY))
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printf(" tin tout");
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if (ISSET(todo, SHOW_STATS_1)) {
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for (i = 0; i < ndrive; i++)
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if (cur.select[i]) {
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if (ISSET(todo, SHOW_TOTALS))
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(void)printf(" KB/t xfr MB ");
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else
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(void)printf(" KB/t t/s MB/s ");
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}
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}
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if (ISSET(todo, SHOW_STATS_2)) {
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for (i = 0; i < ndrive; i++)
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if (cur.select[i])
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(void)printf(" KB xfr time ");
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}
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if (ISSET(todo, SHOW_CPU))
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(void)printf(" us ni sy in id");
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printf("\n");
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}
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static void
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drive_stats(double etime)
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{
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size_t dn;
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double atime, mbps;
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for (dn = 0; dn < ndrive; ++dn) {
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if (!cur.select[dn])
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continue;
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/* average Kbytes per transfer. */
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if (cur.rxfer[dn] + cur.wxfer[dn])
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mbps = ((cur.rbytes[dn] + cur.wbytes[dn]) /
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1024.0) / (cur.rxfer[dn] + cur.wxfer[dn]);
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else
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mbps = 0.0;
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(void)printf(" %5.*f",
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MAX(0, 3 - (int)floor(log10(fmax(1.0, mbps)))), mbps);
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/* average transfers per second. */
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(void)printf(" %4.0f",
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(cur.rxfer[dn] + cur.wxfer[dn]) / etime);
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/* time busy in drive activity */
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atime = (double)cur.time[dn].tv_sec +
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((double)cur.time[dn].tv_usec / (double)1000000);
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/* Megabytes per second. */
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if (atime != 0.0)
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mbps = (cur.rbytes[dn] + cur.wbytes[dn]) /
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(double)(1024 * 1024);
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else
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mbps = 0;
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mbps /= etime;
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(void)printf(" %5.*f ",
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MAX(0, 3 - (int)floor(log10(fmax(1.0, mbps)))), mbps);
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}
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}
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static void
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drive_stats2(double etime)
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{
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size_t dn;
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double atime;
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for (dn = 0; dn < ndrive; ++dn) {
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if (!cur.select[dn])
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continue;
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/* average kbytes per second. */
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(void)printf(" %5.0f",
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(cur.rbytes[dn] + cur.wbytes[dn]) / 1024.0 / etime);
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/* average transfers per second. */
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(void)printf(" %5.0f",
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(cur.rxfer[dn] + cur.wxfer[dn]) / etime);
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/* average time busy in drive activity */
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atime = (double)cur.time[dn].tv_sec +
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((double)cur.time[dn].tv_usec / (double)1000000);
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(void)printf(" %4.2f ", atime / etime);
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}
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}
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static void
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drive_statsx(double etime)
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{
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size_t dn;
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double atime, kbps;
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for (dn = 0; dn < ndrive; ++dn) {
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if (!cur.select[dn])
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continue;
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(void)printf("%-8.8s", cur.name[dn]);
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/* average read Kbytes per transfer */
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if (cur.rxfer[dn])
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kbps = (cur.rbytes[dn] / 1024.0) / cur.rxfer[dn];
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else
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kbps = 0.0;
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(void)printf(" %8.2f", kbps);
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/* average read transfers
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(per second) */
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(void)printf(" %6.0f", cur.rxfer[dn] / etime);
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/* time read busy in drive activity */
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atime = (double)cur.time[dn].tv_sec +
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((double)cur.time[dn].tv_usec / (double)1000000);
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(void)printf(" %6.2f", atime / etime);
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/* average read megabytes
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(per second) */
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(void)printf(" %8.2f",
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cur.rbytes[dn] / (1024.0 * 1024) / etime);
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/* average write Kbytes per transfer */
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if (cur.wxfer[dn])
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kbps = (cur.wbytes[dn] / 1024.0) / cur.wxfer[dn];
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else
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kbps = 0.0;
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(void)printf(" %8.2f", kbps);
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/* average write transfers
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(per second) */
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(void)printf(" %6.0f", cur.wxfer[dn] / etime);
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/* time write busy in drive activity */
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atime = (double)cur.time[dn].tv_sec +
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((double)cur.time[dn].tv_usec / (double)1000000);
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(void)printf(" %6.2f", atime / etime);
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/* average write megabytes
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(per second) */
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(void)printf(" %8.2f\n",
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cur.wbytes[dn] / (1024.0 * 1024) / etime);
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}
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}
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static void
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cpustats(void)
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{
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int state;
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double ttime;
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ttime = 0;
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for (state = 0; state < CPUSTATES; ++state)
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ttime += cur.cp_time[state];
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if (!ttime)
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ttime = 1.0;
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/* States are generally never 100% and can use %3.0f. */
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for (state = 0; state < CPUSTATES; ++state)
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printf(" %2.0f", 100. * cur.cp_time[state] / ttime);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: iostat [-CdDITx] [-c count] [-M core] "
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"[-N system] [-w wait] [drives]\n");
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exit(1);
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}
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static void
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display(void)
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{
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double etime;
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/* Sum up the elapsed ticks. */
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etime = cur.cp_etime;
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/*
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* If we're showing totals only, then don't divide by the
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* system time.
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*/
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if (ISSET(todo, SHOW_TOTALS))
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etime = 1.0;
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if (ISSET(todo, SHOW_STATS_X)) {
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drive_statsx(etime);
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goto out;
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}
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if (ISSET(todo, SHOW_TTY))
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printf("%4.0f %4.0f", cur.tk_nin / etime, cur.tk_nout / etime);
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if (ISSET(todo, SHOW_STATS_1)) {
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drive_stats(etime);
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}
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if (ISSET(todo, SHOW_STATS_2)) {
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drive_stats2(etime);
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}
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if (ISSET(todo, SHOW_CPU))
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cpustats();
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(void)printf("\n");
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out:
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(void)fflush(stdout);
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}
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static int
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selectdrives(int argc, char *argv[])
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{
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int i, maxdrives, ndrives, tried;
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/*
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* Choose drives to be displayed. Priority goes to (in order) drives
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* supplied as arguments and default drives. If everything isn't
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* filled in and there are drives not taken care of, display the first
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* few that fit.
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*
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* The backward compatibility #ifdefs permit the syntax:
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* iostat [ drives ] [ interval [ count ] ]
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*/
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#define BACKWARD_COMPATIBILITY
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for (tried = ndrives = 0; *argv; ++argv) {
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#ifdef BACKWARD_COMPATIBILITY
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if (isdigit((unsigned char)**argv))
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break;
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#endif
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tried++;
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for (i = 0; i < (int)ndrive; i++) {
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if (strcmp(cur.name[i], *argv))
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continue;
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cur.select[i] = 1;
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++ndrives;
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}
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}
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|
if (ndrives == 0 && tried == 0) {
|
|
/*
|
|
* Pick up to defdrives (or all if -x is given) drives
|
|
* if none specified.
|
|
*/
|
|
maxdrives = (ISSET(todo, SHOW_STATS_X) ||
|
|
(int)ndrive < defdrives)
|
|
? (int)(ndrive) : defdrives;
|
|
for (i = 0; i < maxdrives; i++) {
|
|
cur.select[i] = 1;
|
|
|
|
++ndrives;
|
|
if (!ISSET(todo, SHOW_STATS_X) && ndrives == defdrives)
|
|
break;
|
|
}
|
|
}
|
|
|
|
#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;
|
|
|
|
return (ndrives);
|
|
}
|