iostat.c revision 1.32 
1/*	$OpenBSD: iostat.c,v 1.32 2008/07/07 17:16:27 thib 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#include <sys/param.h>
34#include <sys/dkstat.h>
35#include <sys/buf.h>
36#include <sys/time.h>
37#include <sys/sysctl.h>
38#include <sys/mount.h>
39
40#include <string.h>
41#include <stdlib.h>
42#include <paths.h>
43#include "systat.h"
44
45#include "dkstats.h"
46extern struct _disk	cur, last;
47struct bcachestats	bclast, bccur;
48
49static double etime;
50
51void showtotal(void);
52void showdrive(int);
53void print_io(void);
54int read_io(void);
55int select_io(void);
56void showbcache(void);
57
58#define ATIME(x,y) ((double)x[y].tv_sec + \
59        ((double)x[y].tv_usec / (double)1000000))
60
61
62field_def fields_io[] = {
63	{"DEVICE", 8, 16, 1, FLD_ALIGN_LEFT, -1, 0, 0, 0},
64	{"READ", 5, 8, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0},
65	{"WRITE", 5, 8, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0},
66	{"RTPS", 5, 8, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0},
67	{"WTPS", 5, 8, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0},
68	{"SEC", 5, 8, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0},
69	{"", 8, 19, 1, FLD_ALIGN_RIGHT, -1, 0, 0, 0},
70	{"STATS", 12, 15, 1, FLD_ALIGN_LEFT, -1, 0, 0, 0}
71};
72
73#define FIELD_ADDR(x) (&fields_io[x])
74
75#define FLD_IO_DEVICE	FIELD_ADDR(0)
76#define FLD_IO_READ	FIELD_ADDR(1)
77#define FLD_IO_WRITE	FIELD_ADDR(2)
78#define FLD_IO_RTPS	FIELD_ADDR(3)
79#define FLD_IO_WTPS	FIELD_ADDR(4)
80#define FLD_IO_SEC	FIELD_ADDR(5)
81
82/* This is a hack that stuffs bcache statistics to the last two columns! */
83#define FLD_IO_SVAL	FIELD_ADDR(6)
84#define FLD_IO_SSTR	FIELD_ADDR(7)
85
86/* Define views */
87field_def *view_io_0[] = {
88	FLD_IO_DEVICE, FLD_IO_READ, FLD_IO_WRITE, FLD_IO_RTPS,
89	FLD_IO_WTPS, FLD_IO_SEC, FLD_IO_SVAL, FLD_IO_SSTR, NULL
90};
91
92
93/* Define view managers */
94struct view_manager iostat_mgr = {
95	"Iostat", select_io, read_io, NULL, print_header,
96	print_io, keyboard_callback, NULL, NULL
97};
98
99
100field_view views_io[] = {
101	{view_io_0, "iostat", '2', &iostat_mgr},
102	{NULL, NULL, 0, NULL}
103};
104
105
106int
107select_io(void)
108{
109	num_disp = cur.dk_ndrive + 1;
110	return (0);
111}
112
113int
114read_io(void)
115{
116	int mib[3];
117	size_t size;
118
119	dkreadstats();
120	dkswap();
121	num_disp = cur.dk_ndrive + 1;
122
123	bclast = bccur;
124	mib[0] = CTL_VFS;
125	mib[1] = VFS_GENERIC;
126	mib[2] = VFS_BCACHESTAT;
127	size = sizeof(bccur);
128
129	if (sysctl(mib, 3, &bccur, &size, NULL, 0) < 0)
130		error("cannot get vfs.bcachestat");
131
132	if (bclast.numbufs == 0)
133		bclast = bccur;
134
135	return 0;
136}
137
138
139void
140print_io(void)
141{
142	int n, count = 0;
143
144	int i, curr;
145	etime = naptime;
146
147	/* XXX engine internals: save and restore curr_line for bcache */
148	curr = curr_line;
149
150	for (n = dispstart; n < num_disp - 1; n++) {
151		showdrive(n);
152		count++;
153		if (maxprint > 0 && count >= maxprint)
154			break;
155	}
156
157
158	if (maxprint == 0 || count < maxprint)
159		showtotal();
160
161	curr_line = curr;
162	showbcache();
163}
164
165int
166initiostat(void)
167{
168	field_view *v;
169
170	dkinit(1);
171	dkreadstats();
172
173	bzero(&bccur, sizeof(bccur));
174
175	for (v = views_io; v->name != NULL; v++)
176		add_view(v);
177
178	return(1);
179}
180
181void
182showtotal(void)
183{
184	double rsum, wsum, rtsum, wtsum, mssum;
185	int dn;
186
187	rsum = wsum = rtsum = wtsum = mssum = 0.0;
188
189	for (dn = 0; dn < cur.dk_ndrive; dn++) {
190		rsum += cur.dk_rbytes[dn] / etime;
191		wsum += cur.dk_wbytes[dn] / etime;
192		rtsum += cur.dk_rxfer[dn] / etime;
193		wtsum += cur.dk_wxfer[dn] / etime;
194		mssum += ATIME(cur.dk_time, dn) / etime;
195	}
196
197	print_fld_str(FLD_IO_DEVICE, "Totals");
198	print_fld_size(FLD_IO_READ, rsum);
199	print_fld_size(FLD_IO_WRITE, wsum);
200	print_fld_size(FLD_IO_RTPS, rtsum);
201	print_fld_size(FLD_IO_WTPS, wtsum);
202	print_fld_size(FLD_IO_SEC, mssum);
203
204	end_line();
205}
206
207void
208showdrive(int dn)
209{
210	print_fld_str(FLD_IO_DEVICE, cur.dk_name[dn]);
211	print_fld_size(FLD_IO_READ, cur.dk_rbytes[dn]/etime);
212	print_fld_size(FLD_IO_WRITE, cur.dk_wbytes[dn]/ etime);
213	print_fld_size(FLD_IO_RTPS, cur.dk_rxfer[dn] / etime);
214	print_fld_size(FLD_IO_WTPS, cur.dk_wxfer[dn] / etime);
215	print_fld_size(FLD_IO_SEC, ATIME(cur.dk_time, dn) / etime);
216
217	end_line();
218}
219
220
221#define ENDLINE do {					\
222		count++;				\
223 		if (maxprint > 0 && count >= maxprint)	\
224			return;				\
225	} while(0)
226
227void
228showbcache(void)
229{
230	int count = 0;
231
232	print_fld_str(FLD_IO_SSTR, "numbufs");
233	print_fld_size(FLD_IO_SVAL, bccur.numbufs);
234	end_line();
235
236	print_fld_str(FLD_IO_SSTR, "freebufs");
237	print_fld_size(FLD_IO_SVAL, bccur.freebufs);
238	end_line();
239
240	print_fld_str(FLD_IO_SSTR, "numbufpages");
241	print_fld_size(FLD_IO_SVAL, bccur.numbufpages);
242	end_line();
243
244	print_fld_str(FLD_IO_SSTR, "numfreepages");
245	print_fld_size(FLD_IO_SVAL, bccur.numfreepages);
246	end_line();
247
248	print_fld_str(FLD_IO_SSTR, "numdirtypages");
249	print_fld_size(FLD_IO_SVAL, bccur.numdirtypages);
250	end_line();
251
252	print_fld_str(FLD_IO_SSTR, "numcleanpages");
253	print_fld_size(FLD_IO_SVAL, bccur.numcleanpages);
254	end_line();
255
256	print_fld_str(FLD_IO_SSTR, "pendingwrites");
257	print_fld_size(FLD_IO_SVAL, bccur.pendingwrites);
258	end_line();
259
260	print_fld_str(FLD_IO_SSTR, "pendingreads");
261	print_fld_size(FLD_IO_SVAL, bccur.pendingreads);
262	end_line();
263
264	print_fld_str(FLD_IO_SSTR, "numwrites");
265	print_fld_size(FLD_IO_SVAL, bccur.numwrites - bclast.numwrites);
266	end_line();
267
268	print_fld_str(FLD_IO_SSTR, "numreads");
269	print_fld_size(FLD_IO_SVAL, bccur.numreads - bclast.numreads);
270	end_line();
271
272	print_fld_str(FLD_IO_SSTR, "cachehits");
273	print_fld_size(FLD_IO_SVAL, bccur.cachehits - bclast.cachehits);
274	end_line();
275}
276