378 lines
8.0 KiB
C
378 lines
8.0 KiB
C
/* $NetBSD: iostat.c,v 1.37 2009/04/13 23:20:27 lukem Exp $ */
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/*
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* Copyright (c) 1980, 1992, 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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#if 0
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static char sccsid[] = "@(#)iostat.c 8.1 (Berkeley) 6/6/93";
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#endif
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__RCSID("$NetBSD: iostat.c,v 1.37 2009/04/13 23:20:27 lukem Exp $");
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#endif /* not lint */
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#include <sys/param.h>
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#include <string.h>
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#include "systat.h"
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#include "extern.h"
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#include "drvstats.h"
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static int linesperregion;
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static double etime;
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static int numbers = 0; /* default display bar graphs */
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static int secs = 0; /* default seconds shown */
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static int read_write = 0; /* default read/write shown */
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static int barlabels(int);
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static void histogram(double, int, double);
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static int numlabels(int);
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static int stats(int, int, int);
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static void stat1(int, int);
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WINDOW *
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openiostat(void)
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{
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return (subwin(stdscr, -1, 0, 5, 0));
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}
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void
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closeiostat(WINDOW *w)
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{
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if (w == NULL)
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return;
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wclear(w);
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wrefresh(w);
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delwin(w);
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}
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int
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initiostat(void)
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{
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drvinit(1);
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cpureadstats();
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drvreadstats();
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return(1);
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}
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void
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fetchiostat(void)
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{
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cpureadstats();
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if (ndrive != 0)
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drvreadstats();
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}
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#define INSET 14
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void
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labeliostat(void)
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{
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int row;
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if (ndrive == 0) {
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error("No drives defined.");
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return;
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}
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row = 0;
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wmove(wnd, row, 0); wclrtobot(wnd);
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mvwaddstr(wnd, row++, INSET,
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"/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
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mvwaddstr(wnd, row++, 0, " CPU user|");
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mvwaddstr(wnd, row++, 0, " nice|");
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mvwaddstr(wnd, row++, 0, " system|");
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mvwaddstr(wnd, row++, 0, " interrupt|");
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mvwaddstr(wnd, row++, 0, " idle|");
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if (numbers)
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row = numlabels(row + 1);
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else
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row = barlabels(row + 1);
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}
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static int
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numlabels(int row)
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{
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int col, regions;
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size_t i, ndrives;
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#define COLWIDTH (9 + secs * 5 + 1 + read_write * 9 + 1)
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#define DRIVESPERLINE ((getmaxx(wnd) + 1) / COLWIDTH)
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for (ndrives = 0, i = 0; i < ndrive; i++)
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if (cur.select[i])
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ndrives++;
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regions = howmany(ndrives, DRIVESPERLINE);
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/*
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* Deduct -regions for blank line after each scrolling region.
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*/
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linesperregion = (getmaxy(wnd) - row - regions + 1) / regions;
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/*
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* Minimum region contains space for two
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* label lines and one line of statistics.
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*/
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if (linesperregion < 3)
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linesperregion = 3;
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col = 0;
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for (i = 0; i < ndrive; i++)
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if (cur.select[i]) {
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if (col + COLWIDTH - 1 > getmaxx(wnd)) {
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col = 0, row += linesperregion + 1;
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if (row > getmaxy(wnd) - (linesperregion))
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break;
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}
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mvwprintw(wnd, row, col + 5, "%s", cur.name[i]);
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if (read_write)
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mvwprintw(wnd, row, col + 11 + secs * 5,
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"(write)");
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mvwprintw(wnd, row + 1, col, " kBps %s",
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read_write ? "r/s" : "tps");
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if (secs)
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waddstr(wnd, " sec");
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if (read_write)
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waddstr(wnd, " kBps w/s");
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col += COLWIDTH;
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}
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if (col)
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row += linesperregion + 1;
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return (row);
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}
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static int
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barlabels(int row)
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{
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size_t i;
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mvwaddstr(wnd, row++, INSET,
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"/0 /10 /20 /30 /40 /50 /60 /70 /80 /90 /100");
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linesperregion = 2 + secs + (read_write ? 2 : 0);
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for (i = 0; i < ndrive; i++) {
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if (cur.select[i]) {
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if (row > getmaxy(wnd) - linesperregion)
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break;
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mvwprintw(wnd, row++, 0, "%7.7s kBps|",
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cur.name[i]);
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mvwaddstr(wnd, row++, 0, " tps|");
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if (read_write) {
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mvwprintw(wnd, row++, 0, " (write) kBps|");
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mvwaddstr(wnd, row++, 0, " tps|");
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}
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if (secs)
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mvwaddstr(wnd, row++, 0, " msec|");
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}
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}
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return (row);
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}
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void
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showiostat(void)
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{
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int row, col;
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size_t i;
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if (ndrive == 0)
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return;
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cpuswap();
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drvswap();
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etime = cur.cp_etime;
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row = 1;
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/*
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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);
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if (!numbers) {
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row += 2;
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for (i = 0; i < ndrive; i++)
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if (cur.select[i]) {
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if (row > getmaxy(wnd) - linesperregion)
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break;
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row = stats(row, INSET, i);
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}
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return;
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}
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col = 0;
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wmove(wnd, row + linesperregion, 0);
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wdeleteln(wnd);
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wmove(wnd, row + 3, 0);
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winsertln(wnd);
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for (i = 0; i < ndrive; i++)
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if (cur.select[i]) {
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if (col + COLWIDTH - 1 > getmaxx(wnd)) {
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col = 0, row += linesperregion + 1;
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if (row > getmaxy(wnd) - (linesperregion + 1))
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break;
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wmove(wnd, row + linesperregion, 0);
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wdeleteln(wnd);
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wmove(wnd, row + 3, 0);
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winsertln(wnd);
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}
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(void) stats(row + 3, col, i);
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col += COLWIDTH;
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}
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}
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static int
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stats(int row, int col, int dn)
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{
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double atime, rwords, wwords;
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uint64_t rxfer;
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/* time busy in disk 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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/* # of k transferred */
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rwords = cur.rbytes[dn] / 1024.0;
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wwords = cur.wbytes[dn] / 1024.0;
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rxfer = cur.rxfer[dn];
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if (!read_write) {
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rwords += wwords;
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rxfer += cur.wxfer[dn];
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}
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if (numbers) {
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mvwprintw(wnd, row, col, "%5.0f%4.0f",
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rwords / etime, rxfer / etime);
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if (secs)
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wprintw(wnd, "%5.1f", atime / etime);
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if (read_write)
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wprintw(wnd, " %5.0f%4.0f",
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wwords / etime, cur.wxfer[dn] / etime);
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return (row);
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}
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wmove(wnd, row++, col);
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histogram(rwords / etime, 50, 0.5);
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wmove(wnd, row++, col);
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histogram(rxfer / etime, 50, 0.5);
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if (read_write) {
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wmove(wnd, row++, col);
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histogram(wwords / etime, 50, 0.5);
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wmove(wnd, row++, col);
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histogram(cur.wxfer[dn] / etime, 50, 0.5);
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}
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if (secs) {
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wmove(wnd, row++, col);
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atime *= 1000; /* In milliseconds */
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histogram(atime / etime, 50, 0.5);
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}
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return (row);
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}
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static void
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stat1(int row, int o)
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{
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size_t i;
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double total_time;
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total_time = 0;
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for (i = 0; i < CPUSTATES; i++)
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total_time += cur.cp_time[i];
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if (total_time == 0.0)
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total_time = 1.0;
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wmove(wnd, row, INSET);
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#define CPUSCALE 0.5
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histogram(100.0 * cur.cp_time[o] / total_time, 50, CPUSCALE);
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}
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static void
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histogram(double val, int colwidth, double scale)
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{
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int v = (int)(val * scale + 0.5);
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int factor = 1;
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int y, x;
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while (v > colwidth) {
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v = (v + 5) / 10;
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factor *= 10;
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}
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getyx(wnd, y, x);
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wclrtoeol(wnd);
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whline(wnd, 'X', v);
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if (factor != 1)
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mvwprintw(wnd, y, x + colwidth + 1, "* %d ", factor);
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}
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void
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iostat_bars(char *args)
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{
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numbers = 0;
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wclear(wnd);
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labeliostat();
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refresh();
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}
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void
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iostat_numbers(char *args)
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{
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numbers = 1;
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wclear(wnd);
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labeliostat();
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refresh();
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}
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void
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iostat_secs(char *args)
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{
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secs = !secs;
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wclear(wnd);
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labeliostat();
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refresh();
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}
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void
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iostat_rw(char *args)
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{
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read_write ^= 1;
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wclear(wnd);
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labeliostat();
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refresh();
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}
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void
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iostat_all(char *args)
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{
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read_write = 0;
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wclear(wnd);
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labeliostat();
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refresh();
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}
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