fbbd9655e5
Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann <jschauma@stevens.edu> Pull Request: https://github.com/freebsd/freebsd/pull/96
396 lines
10 KiB
C
396 lines
10 KiB
C
/*
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* Copyright (c) 1998 Kenneth D. Merry.
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* 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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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/*
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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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__FBSDID("$FreeBSD$");
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#ifdef lint
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static const char sccsid[] = "@(#)iostat.c 8.1 (Berkeley) 6/6/93";
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#endif
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <sys/resource.h>
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#include <devstat.h>
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#include <err.h>
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#include <nlist.h>
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#include <paths.h>
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#include <stdlib.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 "devs.h"
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struct statinfo cur, last;
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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 kbpt = 0; /* default ms/seek shown */
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static int barlabels(int);
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static void histogram(long double, int, double);
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static int numlabels(int);
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static int devstats(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, LINES-3-1, 0, MAINWIN_ROW, 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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if ((num_devices = devstat_getnumdevs(NULL)) < 0)
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return(0);
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cur.dinfo = calloc(1, sizeof(struct devinfo));
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last.dinfo = calloc(1, sizeof(struct devinfo));
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/*
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* This value for maxshowdevs (100) is bogus. I'm not sure exactly
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* how to calculate it, though.
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*/
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if (dsinit(100, &cur, &last, NULL) != 1)
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return(0);
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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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struct devinfo *tmp_dinfo;
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size_t len;
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len = sizeof(cur.cp_time);
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if (sysctlbyname("kern.cp_time", &cur.cp_time, &len, NULL, 0)
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|| len != sizeof(cur.cp_time)) {
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perror("kern.cp_time");
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exit (1);
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}
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tmp_dinfo = last.dinfo;
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last.dinfo = cur.dinfo;
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cur.dinfo = tmp_dinfo;
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last.snap_time = cur.snap_time;
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/*
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* Here what we want to do is refresh our device stats.
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* getdevs() returns 1 when the device list has changed.
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* If the device list has changed, we want to go through
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* the selection process again, in case a device that we
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* were previously displaying has gone away.
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*/
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switch (devstat_getdevs(NULL, &cur)) {
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case -1:
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errx(1, "%s", devstat_errbuf);
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break;
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case 1:
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cmdiostat("refresh", NULL);
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break;
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default:
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break;
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}
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num_devices = cur.dinfo->numdevs;
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generation = cur.dinfo->generation;
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}
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#define INSET 10
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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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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 i, _col, regions, ndrives;
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char tmpstr[10];
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#define COLWIDTH 17
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#define DRIVESPERLINE ((getmaxx(wnd) - 1 - INSET) / COLWIDTH)
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for (ndrives = 0, i = 0; i < num_devices; i++)
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if (dev_select[i].selected)
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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) - 1 - row - regions) / 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 = INSET;
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for (i = 0; i < num_devices; i++)
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if (dev_select[i].selected) {
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if (_col + COLWIDTH >= getmaxx(wnd) - 1 - INSET) {
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_col = INSET, row += linesperregion + 1;
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if (row > getmaxy(wnd) - 1 - (linesperregion + 1))
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break;
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}
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sprintf(tmpstr, "%s%d", dev_select[i].device_name,
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dev_select[i].unit_number);
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mvwaddstr(wnd, row, _col + 4, tmpstr);
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mvwaddstr(wnd, row + 1, _col, " KB/t tps MB/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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int i;
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char tmpstr[10];
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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 + kbpt;
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for (i = 0; i < num_devices; i++)
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if (dev_select[i].selected) {
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if (row > getmaxy(wnd) - 1 - linesperregion)
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break;
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sprintf(tmpstr, "%s%d", dev_select[i].device_name,
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dev_select[i].unit_number);
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mvwprintw(wnd, row++, 0, "%-5.5s MB/s|",
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tmpstr);
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mvwaddstr(wnd, row++, 0, " tps|");
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if (kbpt)
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mvwaddstr(wnd, row++, 0, " KB/t|");
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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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long t;
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int i, row, _col;
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#define X(fld) t = cur.fld[i]; cur.fld[i] -= last.fld[i]; last.fld[i] = t
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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 /= hertz;
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row = 1;
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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 < num_devices; i++)
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if (dev_select[i].selected) {
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if (row > getmaxy(wnd) - linesperregion)
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break;
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row = devstats(row, INSET, i);
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}
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return;
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}
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_col = INSET;
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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 < num_devices; i++)
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if (dev_select[i].selected) {
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if (_col + COLWIDTH >= getmaxx(wnd) - 1 - INSET) {
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_col = INSET, row += linesperregion + 1;
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if (row > getmaxy(wnd) - 1 - (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) devstats(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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devstats(int row, int _col, int dn)
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{
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long double transfers_per_second;
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long double kb_per_transfer, mb_per_second;
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long double busy_seconds;
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int di;
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di = dev_select[dn].position;
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busy_seconds = cur.snap_time - last.snap_time;
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if (devstat_compute_statistics(&cur.dinfo->devices[di],
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&last.dinfo->devices[di], busy_seconds,
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DSM_KB_PER_TRANSFER, &kb_per_transfer,
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DSM_TRANSFERS_PER_SECOND, &transfers_per_second,
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DSM_MB_PER_SECOND, &mb_per_second, DSM_NONE) != 0)
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errx(1, "%s", devstat_errbuf);
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if (numbers) {
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mvwprintw(wnd, row, _col, " %5.2Lf %3.0Lf %5.2Lf ",
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kb_per_transfer, transfers_per_second,
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mb_per_second);
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return(row);
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}
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wmove(wnd, row++, _col);
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histogram(mb_per_second, 50, .5);
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wmove(wnd, row++, _col);
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histogram(transfers_per_second, 50, .5);
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if (kbpt) {
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wmove(wnd, row++, _col);
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histogram(kb_per_transfer, 50, .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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int i;
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double dtime;
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dtime = 0.0;
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for (i = 0; i < CPUSTATES; i++)
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dtime += cur.cp_time[i];
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if (dtime == 0.0)
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dtime = 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] / dtime, 50, CPUSCALE);
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}
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static void
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histogram(long double val, int colwidth, double scale)
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{
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char buf[10];
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int k;
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int v = (int)(val * scale) + 0.5;
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k = MIN(v, colwidth);
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if (v > colwidth) {
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snprintf(buf, sizeof(buf), "%5.2Lf", val);
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k -= strlen(buf);
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while (k--)
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waddch(wnd, 'X');
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waddstr(wnd, buf);
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return;
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}
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while (k--)
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waddch(wnd, 'X');
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wclrtoeol(wnd);
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}
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int
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cmdiostat(const char *cmd, const char *args)
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{
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if (prefix(cmd, "kbpt"))
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kbpt = !kbpt;
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else if (prefix(cmd, "numbers"))
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numbers = 1;
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else if (prefix(cmd, "bars"))
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numbers = 0;
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else if (!dscmd(cmd, args, 100, &cur))
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return (0);
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wclear(wnd);
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labeliostat();
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refresh();
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return (1);
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}
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