/* $OpenBSD: iostat.c,v 1.25 2007/02/18 20:41:34 jmc 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. */ #ifndef lint static char copyright[] = "@(#) Copyright (c) 1986, 1991, 1993\n\ The Regents of the University of California. All rights reserved.\n"; #endif /* not lint */ #ifndef lint #if 0 static char sccsid[] = "@(#)iostat.c 8.2 (Berkeley) 1/26/94"; #else static char *rcsid = "$NetBSD: iostat.c,v 1.10 1996/10/25 18:21:58 scottr Exp $" ; #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include #include #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, 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 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[]) { int ch, hdrcnt; struct timeval tv; while ((ch = getopt(argc, argv, "Cc:dDIM:N:Tw:")) != -1) switch(ch) { case 'c': if ((reps = atoi(optarg)) <= 0) errx(1, "repetition count <= 0."); 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': if ((interval = atoi(optarg)) <= 0) errx(1, "interval <= 0."); break; case '?': 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); dkreadstats(); selectdrives(argv); tv.tv_sec = interval; tv.tv_usec = 0; /* print a new header on sigcont */ (void)signal(SIGCONT, sigheader); for (hdrcnt = 1;;) { if (!--hdrcnt || wantheader) { header(); hdrcnt = 20; wantheader = 0; } if (!ISSET(todo, SHOW_TOTALS)) dkswap(); display(); if (reps >= 0 && --reps <= 0) break; select(0, NULL, NULL, NULL, &tv); dkreadstats(); if (last.dk_ndrive != cur.dk_ndrive) wantheader = 1; } exit(0); } /*ARGSUSED*/ static void sigheader(int signo) { wantheader = 1; } static void header(void) { int i; /* Main Headers. */ if (ISSET(todo, SHOW_TTY)) (void)printf(" tty"); if (ISSET(todo, SHOW_STATS_1)) for (i = 0; i < dk_ndrive; i++) if (cur.dk_select[i]) (void)printf(" %14.14s ", cur.dk_name[i]); if (ISSET(todo, SHOW_STATS_2)) for (i = 0; i < dk_ndrive; i++) if (cur.dk_select[i]) (void)printf(" %13.13s ", cur.dk_name[i]); if (ISSET(todo, SHOW_CPU)) (void)printf(" cpu"); printf("\n"); /* Sub-Headers. */ if (ISSET(todo, SHOW_TTY)) 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)) (void)printf(" KB/t xfr MB "); else (void)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]) { (void)printf(" KB xfr time "); } if (ISSET(todo, SHOW_CPU)) (void)printf(" us ni sy 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; (void)printf(" %5.2f", mbps); /* average transfers per second. */ (void)printf(" %3.0f", (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; (void)printf(" %4.2f ", 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. */ (void)printf(" %4.0f", (cur.dk_rbytes[dn] + cur.dk_wbytes[dn]) / (1024.0) / etime); /* average transfers per second. */ (void)printf(" %3.0f", (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); (void)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) { (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)) 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(); (void)printf("\n"); (void)fflush(stdout); } static void selectdrives(char *argv[]) { 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 #ifdefs permit the syntax: * iostat [ drives ] [ interval [ count ] ] */ #define BACKWARD_COMPATIBILITY for (ndrives = 0; *argv; ++argv) { #ifdef BACKWARD_COMPATIBILITY if (isdigit(**argv)) break; #endif for (i = 0; i < dk_ndrive; i++) { if (strcmp(cur.dk_name[i], *argv)) continue; cur.dk_select[i] = 1; ++ndrives; } } #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; /* 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; } }