iostat.c revision 1.29 
1/*	$OpenBSD: iostat.c,v 1.29 2008/06/12 17:53:49 beck Exp $	*/
2/*	$NetBSD: iostat.c,v 1.5 1996/05/10 23:16:35 thorpej Exp $	*/
3
4/*
5 * Copyright (c) 1980, 1992, 1993
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#ifndef lint
34#if 0
35static char sccsid[] = "@(#)iostat.c	8.1 (Berkeley) 6/6/93";
36#endif
37static char rcsid[] = "$OpenBSD: iostat.c,v 1.29 2008/06/12 17:53:49 beck Exp $";
38#endif /* not lint */
39
40#include <sys/param.h>
41#include <sys/dkstat.h>
42#include <sys/buf.h>
43#include <sys/time.h>
44#include <sys/sysctl.h>
45#include <sys/mount.h>
46
47#include <string.h>
48#include <stdlib.h>
49#include <paths.h>
50#include "systat.h"
51#include "extern.h"
52
53#include "dkstats.h"
54extern struct _disk	cur, last;
55struct bcachestats	bclast, bccur;
56
57static double etime;
58
59static void numlabels(void);
60
61#define ATIME(x,y) ((double)x[y].tv_sec + \
62        ((double)x[y].tv_usec / (double)1000000))
63
64#define NFMT "%-6.6s  %8.0f %8.0f  %6.0f %6.0f  %4.1f"
65#define SFMT "%-6.6s  %8s %8s  %6s %6s  %4s"
66#define	BCSCOL	50
67
68WINDOW *
69openiostat(void)
70{
71	bzero(&bccur, sizeof(bccur));
72	return (subwin(stdscr, LINES-1-1, 0, 1, 0));
73}
74
75void
76closeiostat(WINDOW *w)
77{
78	if (w == NULL)
79		return;
80	wclear(w);
81	wrefresh(w);
82	delwin(w);
83}
84
85int
86initiostat(void)
87{
88	dkinit(1);
89	dkreadstats();
90	return (1);
91}
92
93void
94fetchiostat(void)
95{
96	int mib[3];
97	size_t size;
98
99	if (cur.dk_ndrive == 0)
100		return;
101	dkreadstats();
102
103	bclast = bccur;
104	mib[0] = CTL_VFS;
105	mib[1] = VFS_GENERIC;
106	mib[2] = VFS_BCACHESTAT;
107	size = sizeof(bccur);
108	if (sysctl(mib, 3, &bccur, &size, NULL, 0) < 0)
109		mvwaddstr(wnd, 20, 0, "cannot get vfs.bcachestat");
110	if (bclast.numbufs == 0)
111		bclast = bccur;
112}
113
114void
115labeliostat(void)
116{
117	mvwprintw(wnd, 1, 0, SFMT, "Device", "rKBytes", "wKBytes", "rtps",
118	    "wtps", "sec");
119	mvwprintw(wnd, 1, BCSCOL + 16, "numbufs");
120	mvwprintw(wnd, 2, BCSCOL + 16, "freebufs");
121	mvwprintw(wnd, 3, BCSCOL + 16, "numbufpages");
122	mvwprintw(wnd, 4, BCSCOL + 16, "numfreepages");
123	mvwprintw(wnd, 5, BCSCOL + 16, "numdirtypages");
124	mvwprintw(wnd, 6, BCSCOL + 16, "numcleanpages");
125	mvwprintw(wnd, 7, BCSCOL + 16, "pendingwrites");
126	mvwprintw(wnd, 8, BCSCOL + 16, "pendingreads");
127	mvwprintw(wnd, 9, BCSCOL + 16, "numwrites");
128	mvwprintw(wnd, 10, BCSCOL + 16, "numreads");
129	mvwprintw(wnd, 11, BCSCOL + 16, "cachehits");
130}
131
132void
133showiostat(void)
134{
135	int i;
136
137	dkswap();
138
139	etime = 0.0;
140	for (i = 0; i < CPUSTATES; i++) {
141		etime += cur.cp_time[i];
142	}
143
144	if (etime == 0.0)
145		etime = 1.0;
146
147	etime /= (float) hz;
148
149	if (last.dk_ndrive != cur.dk_ndrive)
150		labeliostat();
151
152	if (cur.dk_ndrive == 0)
153		return;
154
155	numlabels();
156
157	mvwprintw(wnd, 1, BCSCOL, "%15ld", bccur.numbufs);
158	mvwprintw(wnd, 2, BCSCOL, "%15ld", bccur.freebufs);
159	mvwprintw(wnd, 3, BCSCOL, "%15ld", bccur.numbufpages);
160	if (bccur.numfreepages)
161		mvwprintw(wnd, 4, BCSCOL, "%15ld", bccur.numfreepages);
162	else
163		mvwprintw(wnd, 4, BCSCOL, "%15s", "");
164	if (bccur.numdirtypages)
165		mvwprintw(wnd, 5, BCSCOL, "%15ld", bccur.numdirtypages);
166	else
167		mvwprintw(wnd, 5, BCSCOL, "%15s", "");
168	if (bccur.numcleanpages)
169		mvwprintw(wnd, 6, BCSCOL, "%15ld", bccur.numcleanpages);
170	else
171		mvwprintw(wnd, 6, BCSCOL, "%15s", "");
172	if (bccur.pendingwrites)
173		mvwprintw(wnd, 7, BCSCOL, "%15ld", bccur.pendingwrites);
174	else
175		mvwprintw(wnd, 7, BCSCOL, "%15s", "");
176	if (bccur.pendingreads)
177		mvwprintw(wnd, 8, BCSCOL, "%15ld", bccur.pendingreads);
178	else
179		mvwprintw(wnd, 8, BCSCOL, "%15s", "");
180	if (bccur.numwrites - bclast.numwrites)
181		mvwprintw(wnd, 9, BCSCOL, "%15ld",
182		    bccur.numwrites - bclast.numwrites);
183	else
184		mvwprintw(wnd, 9, BCSCOL, "%15s", "");
185	if (bccur.numreads - bclast.numreads)
186		mvwprintw(wnd, 10, BCSCOL, "%15ld",
187		    bccur.numreads - bclast.numreads);
188	else
189		mvwprintw(wnd, 10, BCSCOL, "%15s", "");
190	if (bccur.cachehits - bclast.cachehits)
191		mvwprintw(wnd, 11, BCSCOL, "%15ld",
192		    bccur.cachehits - bclast.cachehits);
193	else
194		mvwprintw(wnd, 11, BCSCOL, "%15s", "");
195}
196
197void
198numlabels(void)
199{
200	double rsum, wsum, rtsum, wtsum, mssum;
201	int row, dn;
202
203	row = 2;
204	wmove(wnd, 0, 0);
205	wclrtoeol(wnd);
206
207	if (cur.dk_ndrive == 0) {
208		mvwaddstr(wnd, row, 0, "No drives attached.");
209		return;
210	}
211
212	rsum = wsum = rtsum = wtsum = mssum = 0.0;
213
214	for (dn = 0; dn < cur.dk_ndrive; dn++) {
215		rsum += cur.dk_rbytes[dn] / etime;
216		wsum += cur.dk_wbytes[dn] / etime;
217		rtsum += cur.dk_rxfer[dn] / etime;
218		wtsum += cur.dk_wxfer[dn] / etime;
219		mssum += ATIME(cur.dk_time, dn) / etime;
220		mvwprintw(wnd, row++, 0, NFMT,
221		    cur.dk_name[dn],
222		    cur.dk_rbytes[dn] / 1024.0 / etime,
223		    cur.dk_wbytes[dn] / 1024.0 / etime,
224		    cur.dk_rxfer[dn] / etime,
225		    cur.dk_wxfer[dn] / etime,
226		    ATIME(cur.dk_time, dn) / etime);
227	}
228	mvwprintw(wnd, row++, 0, NFMT,
229	    "Totals", rsum / 1024.0, wsum / 1024.0, rtsum, wtsum, mssum);
230}
231
232int
233cmdiostat(char *cmd, char *args)
234{
235	wclear(wnd);
236	labeliostat();
237	refresh();
238	return (1);
239}
240