NetBSD/usr.bin/systat/iostat.c

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/* $NetBSD: iostat.c,v 1.19 2002/01/28 13:20:43 augustss Exp $ */
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/*
* 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.
*/
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#include <sys/cdefs.h>
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#ifndef lint
#if 0
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static char sccsid[] = "@(#)iostat.c 8.1 (Berkeley) 6/6/93";
#endif
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__RCSID("$NetBSD: iostat.c,v 1.19 2002/01/28 13:20:43 augustss Exp $");
#endif /* not lint */
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#include <sys/param.h>
#include <string.h>
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#include "systat.h"
#include "extern.h"
#include "dkstats.h"
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static int linesperregion;
static double etime;
static int numbers = 0; /* default display bar graphs */
static int secs = 0; /* default seconds shown */
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static int barlabels(int);
static void histogram(double, int, double);
static int numlabels(int);
static int stats(int, int, int);
static void stat1(int, int);
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WINDOW *
openiostat(void)
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{
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return (subwin(stdscr, LINES-1-5, 0, 5, 0));
}
void
closeiostat(WINDOW *w)
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{
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if (w == NULL)
return;
wclear(w);
wrefresh(w);
delwin(w);
}
int
initiostat(void)
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{
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dkinit(1);
dkreadstats();
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return(1);
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}
void
fetchiostat(void)
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{
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if (dk_ndrive == 0)
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return;
dkreadstats();
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}
#define INSET 14
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void
labeliostat(void)
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{
int row;
if (dk_ndrive == 0) {
error("No drives defined.");
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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, " interrupt|");
mvwaddstr(wnd, row++, 0, " idle|");
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if (numbers)
row = numlabels(row + 1);
else
row = barlabels(row + 1);
}
static int
numlabels(int row)
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{
int i, col, regions, ndrives;
#define COLWIDTH 14
#define DRIVESPERLINE ((getmaxx(wnd) - INSET) / COLWIDTH)
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for (ndrives = 0, i = 0; i < dk_ndrive; i++)
if (cur.dk_select[i])
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ndrives++;
regions = howmany(ndrives, DRIVESPERLINE);
/*
* Deduct -regions for blank line after each scrolling region.
*/
linesperregion = (getmaxy(wnd) - row - regions) / regions;
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/*
* 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 (cur.dk_select[i] /*&& cur.dk_bytes[i] != 0.0*/) {
if (col + COLWIDTH >= getmaxx(wnd) - INSET) {
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col = 0, row += linesperregion + 1;
if (row > getmaxy(wnd) - (linesperregion + 1))
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break;
}
mvwaddstr(wnd, row, col + 4, cur.dk_name[i]);
mvwaddstr(wnd, row + 1, col, "KBps tps sec");
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col += COLWIDTH;
}
if (col)
row += linesperregion + 1;
return (row);
}
static int
barlabels(int row)
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{
int i;
mvwaddstr(wnd, row++, INSET,
"/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
linesperregion = 2 + secs;
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for (i = 0; i < dk_ndrive; i++)
if (cur.dk_select[i] /*&& cur.dk_bytes[i] != 0.0*/) {
if (row > getmaxy(wnd) - linesperregion)
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break;
mvwprintw(wnd, row++, 0, "%7.7s KBps|", cur.dk_name[i]);
mvwaddstr(wnd, row++, 0, " tps|");
if (secs)
mvwaddstr(wnd, row++, 0, " msec|");
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}
return (row);
}
void
showiostat(void)
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{
int i, row, col;
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if (dk_ndrive == 0)
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return;
dkswap();
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etime = 0;
for(i = 0; i < CPUSTATES; i++) {
etime += cur.cp_time[i];
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}
if (etime == 0.0)
etime = 1.0;
etime /= (float) hz;
row = 1;
/*
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* Interrupt CPU state not calculated yet.
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*/
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for (i = 0; i < CPUSTATES; i++)
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stat1(row++, i);
if (!numbers) {
row += 2;
for (i = 0; i < dk_ndrive; i++)
if (cur.dk_select[i] /*&& cur.dk_bytes[i] != 0.0*/) {
if (row > getmaxy(wnd) - linesperregion)
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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 (cur.dk_select[i] /*&& cur.dk_bytes[i] != 0.0*/) {
if (col + COLWIDTH >= getmaxx(wnd)) {
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col = 0, row += linesperregion + 1;
if (row > getmaxy(wnd) - (linesperregion + 1))
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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(int row, int col, int dn)
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{
double atime, words;
/* time busy in disk activity */
atime = (double)cur.dk_time[dn].tv_sec +
((double)cur.dk_time[dn].tv_usec / (double)1000000);
words = cur.dk_bytes[dn] / 1024.0; /* # of K transferred */
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if (numbers) {
mvwprintw(wnd, row, col, " %3.0f%4.0f%5.1f",
words / etime, cur.dk_xfer[dn] / etime, atime / etime);
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return (row);
}
wmove(wnd, row++, col);
histogram(words / etime, 50, 0.5);
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wmove(wnd, row++, col);
histogram(cur.dk_xfer[dn] / etime, 50, 0.5);
if (secs) {
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wmove(wnd, row++, col);
atime *= 1000; /* In milliseconds */
histogram(atime / etime, 50, 0.5);
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}
return (row);
}
static void
stat1(int row, int o)
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{
int i;
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double time;
time = 0;
for (i = 0; i < CPUSTATES; i++)
time += cur.cp_time[i];
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if (time == 0.0)
time = 1.0;
wmove(wnd, row, INSET);
#define CPUSCALE 0.5
histogram(100.0 * cur.cp_time[o] / time, 50, CPUSCALE);
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}
static void
histogram(double val, int colwidth, double scale)
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{
char buf[10];
int k;
int v = (int)(val * scale) + 0.5;
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k = MIN(v, colwidth);
if (v > colwidth) {
snprintf(buf, sizeof buf, "%4.1f", val);
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k -= strlen(buf);
while (k--)
waddch(wnd, 'X');
waddstr(wnd, buf);
wclrtoeol(wnd);
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return;
}
wclrtoeol(wnd);
whline(wnd, 'X', k);
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}
void
iostat_bars(char *args)
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{
numbers = 0;
wclear(wnd);
labeliostat();
refresh();
}
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void
iostat_numbers(char *args)
{
numbers = 1;
wclear(wnd);
labeliostat();
refresh();
}
void
iostat_secs(char *args)
{
secs = !secs;
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wclear(wnd);
labeliostat();
refresh();
}