4.4BSD/usr/src/usr.bin/systat/iostat.c
/*
* Copyright (c) 1980, 1992, 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 char sccsid[] = "@(#)iostat.c 8.1 (Berkeley) 6/6/93";
#endif not lint
#include <sys/param.h>
#include <sys/dkstat.h>
#include <sys/buf.h>
#include <string.h>
#include <stdlib.h>
#include <nlist.h>
#include <paths.h>
#include "systat.h"
#include "extern.h"
static struct nlist namelist[] = {
#define X_DK_BUSY 0
{ "_dk_busy" },
#define X_DK_TIME 1
{ "_dk_time" },
#define X_DK_XFER 2
{ "_dk_xfer" },
#define X_DK_WDS 3
{ "_dk_wds" },
#define X_DK_SEEK 4
{ "_dk_seek" },
#define X_CP_TIME 5
{ "_cp_time" },
#ifdef vax
#define X_MBDINIT (X_CP_TIME+1)
{ "_mbdinit" },
#define X_UBDINIT (X_CP_TIME+2)
{ "_ubdinit" },
#endif
#ifdef tahoe
#define X_VBDINIT (X_CP_TIME+1)
{ "_vbdinit" },
#endif
{ "" },
};
static struct {
int dk_busy;
long cp_time[CPUSTATES];
long *dk_time;
long *dk_wds;
long *dk_seek;
long *dk_xfer;
} s, s1;
static int linesperregion;
static double etime;
static int numbers = 0; /* default display bar graphs */
static int msps = 0; /* default ms/seek shown */
static int barlabels __P((int));
static void histogram __P((double, int, double));
static int numlabels __P((int));
static int stats __P((int, int, int));
static void stat1 __P((int, int));
WINDOW *
openiostat()
{
return (subwin(stdscr, LINES-1-5, 0, 5, 0));
}
void
closeiostat(w)
WINDOW *w;
{
if (w == NULL)
return;
wclear(w);
wrefresh(w);
delwin(w);
}
int
initiostat()
{
if (namelist[X_DK_BUSY].n_type == 0) {
if (kvm_nlist(kd, namelist)) {
nlisterr(namelist);
return(0);
}
if (namelist[X_DK_BUSY].n_type == 0) {
error("Disk init information isn't in namelist");
return(0);
}
}
if (! dkinit())
return(0);
if (dk_ndrive) {
#define allocate(e, t) \
s./**/e = (t *)calloc(dk_ndrive, sizeof (t)); \
s1./**/e = (t *)calloc(dk_ndrive, sizeof (t));
allocate(dk_time, long);
allocate(dk_wds, long);
allocate(dk_seek, long);
allocate(dk_xfer, long);
#undef allocate
}
return(1);
}
void
fetchiostat()
{
if (namelist[X_DK_BUSY].n_type == 0)
return;
NREAD(X_DK_BUSY, &s.dk_busy, LONG);
NREAD(X_DK_TIME, s.dk_time, dk_ndrive * LONG);
NREAD(X_DK_XFER, s.dk_xfer, dk_ndrive * LONG);
NREAD(X_DK_WDS, s.dk_wds, dk_ndrive * LONG);
NREAD(X_DK_SEEK, s.dk_seek, dk_ndrive * LONG);
NREAD(X_CP_TIME, s.cp_time, sizeof s.cp_time);
}
#define INSET 10
void
labeliostat()
{
int row;
if (namelist[X_DK_BUSY].n_type == 0) {
error("No dk_busy defined.");
return;
}
row = 0;
wmove(wnd, row, 0); wclrtobot(wnd);
mvwaddstr(wnd, row++, INSET,
"/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
mvwaddstr(wnd, row++, 0, "cpu user|");
mvwaddstr(wnd, row++, 0, " nice|");
mvwaddstr(wnd, row++, 0, " system|");
mvwaddstr(wnd, row++, 0, " idle|");
if (numbers)
row = numlabels(row + 1);
else
row = barlabels(row + 1);
}
static int
numlabels(row)
int row;
{
int i, col, regions, ndrives;
#define COLWIDTH 14
#define DRIVESPERLINE ((wnd->maxx - INSET) / COLWIDTH)
for (ndrives = 0, i = 0; i < dk_ndrive; i++)
if (dk_select[i])
ndrives++;
regions = howmany(ndrives, DRIVESPERLINE);
/*
* Deduct -regions for blank line after each scrolling region.
*/
linesperregion = (wnd->maxy - row - regions) / regions;
/*
* Minimum region contains space for two
* label lines and one line of statistics.
*/
if (linesperregion < 3)
linesperregion = 3;
col = 0;
for (i = 0; i < dk_ndrive; i++)
if (dk_select[i] && dk_mspw[i] != 0.0) {
if (col + COLWIDTH >= wnd->maxx - INSET) {
col = 0, row += linesperregion + 1;
if (row > wnd->maxy - (linesperregion + 1))
break;
}
mvwaddstr(wnd, row, col + 4, dr_name[i]);
mvwaddstr(wnd, row + 1, col, "bps tps msps");
col += COLWIDTH;
}
if (col)
row += linesperregion + 1;
return (row);
}
static int
barlabels(row)
int row;
{
int i;
mvwaddstr(wnd, row++, INSET,
"/0 /5 /10 /15 /20 /25 /30 /35 /40 /45 /50");
linesperregion = 2 + msps;
for (i = 0; i < dk_ndrive; i++)
if (dk_select[i] && dk_mspw[i] != 0.0) {
if (row > wnd->maxy - linesperregion)
break;
mvwprintw(wnd, row++, 0, "%3.3s bps|", dr_name[i]);
mvwaddstr(wnd, row++, 0, " tps|");
if (msps)
mvwaddstr(wnd, row++, 0, " msps|");
}
return (row);
}
void
showiostat()
{
register long t;
register int i, row, col;
if (namelist[X_DK_BUSY].n_type == 0)
return;
for (i = 0; i < dk_ndrive; i++) {
#define X(fld) t = s.fld[i]; s.fld[i] -= s1.fld[i]; s1.fld[i] = t
X(dk_xfer); X(dk_seek); X(dk_wds); X(dk_time);
}
etime = 0;
for(i = 0; i < CPUSTATES; i++) {
X(cp_time);
etime += s.cp_time[i];
}
if (etime == 0.0)
etime = 1.0;
etime /= (float) hz;
row = 1;
/*
* Last CPU state not calculated yet.
*/
for (i = 0; i < CPUSTATES - 1; i++)
stat1(row++, i);
if (!numbers) {
row += 2;
for (i = 0; i < dk_ndrive; i++)
if (dk_select[i] && dk_mspw[i] != 0.0) {
if (row > wnd->maxy - linesperregion)
break;
row = stats(row, INSET, i);
}
return;
}
col = 0;
wmove(wnd, row + linesperregion, 0);
wdeleteln(wnd);
wmove(wnd, row + 3, 0);
winsertln(wnd);
for (i = 0; i < dk_ndrive; i++)
if (dk_select[i] && dk_mspw[i] != 0.0) {
if (col + COLWIDTH >= wnd->maxx) {
col = 0, row += linesperregion + 1;
if (row > wnd->maxy - (linesperregion + 1))
break;
wmove(wnd, row + linesperregion, 0);
wdeleteln(wnd);
wmove(wnd, row + 3, 0);
winsertln(wnd);
}
(void) stats(row + 3, col, i);
col += COLWIDTH;
}
}
static int
stats(row, col, dn)
int row, col, dn;
{
double atime, words, xtime, itime;
atime = s.dk_time[dn];
atime /= (float) hz;
words = s.dk_wds[dn]*32.0; /* number of words transferred */
xtime = dk_mspw[dn]*words; /* transfer time */
itime = atime - xtime; /* time not transferring */
if (xtime < 0)
itime += xtime, xtime = 0;
if (itime < 0)
xtime += itime, itime = 0;
if (numbers) {
mvwprintw(wnd, row, col, "%3.0f%4.0f%5.1f",
words / 512 / etime, s.dk_xfer[dn] / etime,
s.dk_seek[dn] ? itime * 1000. / s.dk_seek[dn] : 0.0);
return (row);
}
wmove(wnd, row++, col);
histogram(words / 512 / etime, 50, 1.0);
wmove(wnd, row++, col);
histogram(s.dk_xfer[dn] / etime, 50, 1.0);
if (msps) {
wmove(wnd, row++, col);
histogram(s.dk_seek[dn] ? itime * 1000. / s.dk_seek[dn] : 0,
50, 1.0);
}
return (row);
}
static void
stat1(row, o)
int row, o;
{
register int i;
double time;
time = 0;
for (i = 0; i < CPUSTATES; i++)
time += s.cp_time[i];
if (time == 0.0)
time = 1.0;
wmove(wnd, row, INSET);
#define CPUSCALE 0.5
histogram(100.0 * s.cp_time[o] / time, 50, CPUSCALE);
}
static void
histogram(val, colwidth, scale)
double val;
int colwidth;
double scale;
{
char buf[10];
register int k;
register int v = (int)(val * scale) + 0.5;
k = MIN(v, colwidth);
if (v > colwidth) {
sprintf(buf, "%4.1f", val);
k -= strlen(buf);
while (k--)
waddch(wnd, 'X');
waddstr(wnd, buf);
return;
}
while (k--)
waddch(wnd, 'X');
wclrtoeol(wnd);
}
int
cmdiostat(cmd, args)
char *cmd, *args;
{
if (prefix(cmd, "msps"))
msps = !msps;
else if (prefix(cmd, "numbers"))
numbers = 1;
else if (prefix(cmd, "bars"))
numbers = 0;
else if (!dkcmd(cmd, args))
return (0);
wclear(wnd);
labeliostat();
refresh();
return (1);
}