396 lines
9.7 KiB
C
396 lines
9.7 KiB
C
/*-
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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. 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 by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef lint
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static char copyright[] =
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"@(#) Copyright (c) 1986, 1991, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif /* not lint */
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#ifndef lint
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static char sccsid[] = "@(#)iostat.c 8.2 (Berkeley) 1/26/94";
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/buf.h>
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#include <sys/dkstat.h>
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#include <err.h>
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#include <ctype.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <limits.h>
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#include <nlist.h>
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#include <paths.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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struct nlist namelist[] = {
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#define X_DK_TIME 0
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{ "_dk_time" },
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#define X_DK_XFER 1
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{ "_dk_xfer" },
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#define X_DK_WDS 2
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{ "_dk_wds" },
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#define X_TK_NIN 3
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{ "_tk_nin" },
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#define X_TK_NOUT 4
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{ "_tk_nout" },
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#define X_DK_SEEK 5
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{ "_dk_seek" },
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#define X_CP_TIME 6
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{ "_cp_time" },
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#define X_DK_WPMS 7
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{ "_dk_wpms" },
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#define X_HZ 8
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{ "_hz" },
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#define X_STATHZ 9
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{ "_stathz" },
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#define X_DK_NDRIVE 10
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{ "_dk_ndrive" },
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#define X_END 10
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#if defined(hp300) || defined(luna68k)
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#define X_HPDINIT (X_END+1)
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{ "_hp_dinit" },
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#endif
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#if defined(i386)
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#define X_DK_NAMES (X_END+1)
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{ "_dk_names" },
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#endif
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#ifdef mips
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#define X_SCSI_DINIT (X_END+1)
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{ "_scsi_dinit" },
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#endif
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#ifdef tahoe
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#define X_VBDINIT (X_END+1)
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{ "_vbdinit" },
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#endif
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#ifdef vax
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{ "_mbdinit" },
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#define X_MBDINIT (X_END+1)
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{ "_ubdinit" },
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#define X_UBDINIT (X_END+2)
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#endif
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{ NULL },
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};
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struct _disk {
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long cp_time[CPUSTATES];
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long *dk_time;
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long *dk_wds;
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long *dk_seek;
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long *dk_xfer;
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long tk_nin;
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long tk_nout;
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} cur, last;
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kvm_t *kd;
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double etime;
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long *dk_wpms;
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int dk_ndrive, *dr_select, hz, kmemfd, ndrives;
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char **dr_name;
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#define nlread(x, v) \
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kvm_read(kd, namelist[x].n_value, &(v), sizeof(v))
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#include "names.c" /* XXX */
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void cpustats __P((void));
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void dkstats __P((void));
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void phdr __P((int));
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void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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register int i;
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long tmp;
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int ch, hdrcnt, reps, interval, stathz, ndrives;
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char **cp, *memf, *nlistf, buf[30];
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char errbuf[_POSIX2_LINE_MAX];
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interval = reps = 0;
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nlistf = memf = NULL;
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while ((ch = getopt(argc, argv, "c:M:N:w:")) != EOF)
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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 '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 '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 '?':
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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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/*
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* Discard setgid privileges if not the running kernel so that bad
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* guys can't print interesting stuff from kernel memory.
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*/
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if (nlistf != NULL || memf != NULL)
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setgid(getgid());
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kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
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if (kd == 0)
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errx(1, "kvm_openfiles: %s", errbuf);
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if (kvm_nlist(kd, namelist) == -1)
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errx(1, "kvm_nlist: %s", kvm_geterr(kd));
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if (namelist[X_DK_NDRIVE].n_type == 0)
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errx(1, "dk_ndrive not found in namelist");
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(void)nlread(X_DK_NDRIVE, dk_ndrive);
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if (dk_ndrive <= 0)
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errx(1, "invalid dk_ndrive %d\n", dk_ndrive);
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cur.dk_time = calloc(dk_ndrive, sizeof(long));
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cur.dk_wds = calloc(dk_ndrive, sizeof(long));
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cur.dk_seek = calloc(dk_ndrive, sizeof(long));
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cur.dk_xfer = calloc(dk_ndrive, sizeof(long));
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last.dk_time = calloc(dk_ndrive, sizeof(long));
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last.dk_wds = calloc(dk_ndrive, sizeof(long));
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last.dk_seek = calloc(dk_ndrive, sizeof(long));
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last.dk_xfer = calloc(dk_ndrive, sizeof(long));
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dr_select = calloc(dk_ndrive, sizeof(int));
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dr_name = calloc(dk_ndrive, sizeof(char *));
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dk_wpms = calloc(dk_ndrive, sizeof(long));
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for (i = 0; i < dk_ndrive; i++) {
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(void)sprintf(buf, "dk%d", i);
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dr_name[i] = strdup(buf);
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}
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if (!read_names())
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exit(1);
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(void)nlread(X_HZ, hz);
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(void)nlread(X_STATHZ, stathz);
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if (stathz)
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hz = stathz;
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(void)kvm_read(kd, namelist[X_DK_WPMS].n_value, dk_wpms,
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dk_ndrive * sizeof(dk_wpms));
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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 (ndrives = 0; *argv; ++argv) {
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#ifdef BACKWARD_COMPATIBILITY
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if (isdigit(**argv))
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break;
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#endif
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for (i = 0; i < dk_ndrive; i++) {
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if (strcmp(dr_name[i], *argv))
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continue;
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dr_select[i] = 1;
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++ndrives;
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}
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}
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#ifdef BACKWARD_COMPATIBILITY
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if (*argv) {
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interval = atoi(*argv);
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if (*++argv)
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reps = atoi(*argv);
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}
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#endif
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if (interval) {
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if (!reps)
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reps = -1;
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} else
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if (reps)
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interval = 1;
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for (i = 0; i < dk_ndrive && ndrives < 4; i++) {
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if (dr_select[i] || dk_wpms[i] == 0)
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continue;
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for (cp = defdrives; *cp; cp++)
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if (strcmp(dr_name[i], *cp) == 0) {
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dr_select[i] = 1;
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++ndrives;
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break;
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}
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}
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for (i = 0; i < dk_ndrive && ndrives < 4; i++) {
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if (dr_select[i])
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continue;
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dr_select[i] = 1;
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++ndrives;
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}
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(void)signal(SIGCONT, phdr);
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for (hdrcnt = 1;;) {
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if (!--hdrcnt) {
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phdr(0);
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hdrcnt = 20;
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}
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(void)kvm_read(kd, namelist[X_DK_TIME].n_value,
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cur.dk_time, dk_ndrive * sizeof(long));
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(void)kvm_read(kd, namelist[X_DK_XFER].n_value,
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cur.dk_xfer, dk_ndrive * sizeof(long));
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(void)kvm_read(kd, namelist[X_DK_WDS].n_value,
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cur.dk_wds, dk_ndrive * sizeof(long));
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(void)kvm_read(kd, namelist[X_DK_SEEK].n_value,
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cur.dk_seek, dk_ndrive * sizeof(long));
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(void)kvm_read(kd, namelist[X_TK_NIN].n_value,
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&cur.tk_nin, sizeof(cur.tk_nin));
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(void)kvm_read(kd, namelist[X_TK_NOUT].n_value,
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&cur.tk_nout, sizeof(cur.tk_nout));
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(void)kvm_read(kd, namelist[X_CP_TIME].n_value,
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cur.cp_time, sizeof(cur.cp_time));
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for (i = 0; i < dk_ndrive; i++) {
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if (!dr_select[i])
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continue;
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#define X(fld) tmp = cur.fld[i]; cur.fld[i] -= last.fld[i]; last.fld[i] = tmp
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X(dk_xfer);
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X(dk_seek);
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X(dk_wds);
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X(dk_time);
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}
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tmp = cur.tk_nin;
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cur.tk_nin -= last.tk_nin;
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last.tk_nin = tmp;
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tmp = cur.tk_nout;
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cur.tk_nout -= last.tk_nout;
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last.tk_nout = tmp;
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etime = 0;
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for (i = 0; i < CPUSTATES; i++) {
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X(cp_time);
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etime += cur.cp_time[i];
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}
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if (etime == 0.0)
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etime = 1.0;
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etime /= (float)hz;
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(void)printf("%4.0f%5.0f",
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cur.tk_nin / etime, cur.tk_nout / etime);
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dkstats();
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cpustats();
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(void)printf("\n");
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(void)fflush(stdout);
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if (reps >= 0 && --reps <= 0)
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break;
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(void)sleep(interval);
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}
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exit(0);
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}
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/* ARGUSED */
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void
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phdr(signo)
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int signo;
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{
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register int i;
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(void)printf(" tty");
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for (i = 0; i < dk_ndrive; i++)
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if (dr_select[i])
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(void)printf(" %3.3s ", dr_name[i]);
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(void)printf(" cpu\n tin tout");
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for (i = 0; i < dk_ndrive; i++)
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if (dr_select[i])
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(void)printf(" sps tps msps ");
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(void)printf(" us ni sy in id\n");
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}
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void
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dkstats()
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{
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register int dn;
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double atime, itime, msps, words, xtime;
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for (dn = 0; dn < dk_ndrive; ++dn) {
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if (!dr_select[dn])
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continue;
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words = cur.dk_wds[dn] * 32; /* words xfer'd */
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(void)printf("%4.0f", /* sectors */
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words / (DEV_BSIZE / 2) / etime);
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(void)printf("%4.0f", cur.dk_xfer[dn] / etime);
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if (dk_wpms[dn] && cur.dk_xfer[dn]) {
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atime = cur.dk_time[dn]; /* ticks disk busy */
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atime /= (float)hz; /* ticks to seconds */
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xtime = words / dk_wpms[dn]; /* transfer time */
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itime = atime - xtime; /* time not xfer'ing */
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if (itime < 0)
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msps = 0;
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else
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msps = itime * 1000 / cur.dk_xfer[dn];
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} else
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msps = 0;
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(void)printf("%5.1f ", msps);
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}
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}
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void
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cpustats()
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{
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register int state;
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double time;
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time = 0;
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for (state = 0; state < CPUSTATES; ++state)
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time += cur.cp_time[state];
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for (state = 0; state < CPUSTATES; ++state)
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(void)printf("%3.0f",
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100. * cur.cp_time[state] / (time ? time : 1));
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}
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void
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usage()
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{
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(void)fprintf(stderr,
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"usage: iostat [-c count] [-M core] [-N system] [-w wait] [drives]\n");
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exit(1);
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}
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