1/*
2 * Copyright 1996 Massachusetts Institute of Technology
3 *
4 * Permission to use, copy, modify, and distribute this software and
5 * its documentation for any purpose and without fee is hereby
6 * granted, provided that both the above copyright notice and this
7 * permission notice appear in all copies, that both the above
8 * copyright notice and this permission notice appear in all
9 * supporting documentation, and that the name of M.I.T. not be used
10 * in advertising or publicity pertaining to distribution of the
11 * software without specific, written prior permission.  M.I.T. makes
12 * no representations about the suitability of this software for any
13 * purpose.  It is provided "as is" without express or implied
14 * warranty.
15 *
16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#include <sys/types.h>
31#include <sys/ioctl.h>
32
33#include <machine/cpu.h>
34#include <machine/perfmon.h>
35
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <err.h>
40#include <unistd.h>
41#include <fcntl.h>
42#include <limits.h>
43#include <errno.h>
44
45static int getnum(const char *, int, int);
46static void usage(const char *) __dead2;
47
48int
49main(int argc, char **argv)
50{
51	int c, fd, num;
52	int loops, i, sleeptime;
53	char *cmd;
54	struct pmc pmc;
55	struct pmc_tstamp then, now;
56	struct pmc_data value;
57	quad_t *buf;
58	double total;
59
60	pmc.pmc_num = 0;
61	pmc.pmc_event = 0;
62	pmc.pmc_unit = 0;
63	pmc.pmc_flags = 0;
64	pmc.pmc_mask = 0;
65	cmd = NULL;
66	loops = 50;
67	sleeptime = 0;
68
69	while ((c = getopt(argc, argv, "s:l:uoeiU:m:c:")) != -1) {
70		switch(c) {
71		case 'u':
72			pmc.pmc_flags |= PMCF_USR;
73			break;
74		case 'o':
75			pmc.pmc_flags |= PMCF_OS;
76			break;
77		case 'e':
78			pmc.pmc_flags |= PMCF_E;
79			break;
80		case 'i':
81			pmc.pmc_flags |= PMCF_INV;
82			break;
83		case 'U':
84			pmc.pmc_unit = getnum(optarg, 0, 256);
85			break;
86		case 'm':
87			pmc.pmc_mask = getnum(optarg, 0, 256);
88			break;
89		case 'l':
90			loops = getnum(optarg, 1, INT_MAX - 1);
91			break;
92		case 's':
93			sleeptime = getnum(optarg, 0, INT_MAX - 1);
94			break;
95		case 'c':
96			cmd = optarg;
97			break;
98		default:
99			usage(argv[0]);
100		}
101	}
102
103	if (argc - optind != 1)
104		usage(argv[0]);
105
106	pmc.pmc_event = getnum(argv[optind], 0, 255);
107
108	buf = malloc((loops + 1) * sizeof *buf);
109	if (!buf)
110		err(1, "malloc(%lu)", (unsigned long)(loops +1) * sizeof *buf);
111
112	fd = open(_PATH_PERFMON, O_RDWR, 0);
113	if (fd < 0)
114		err(1, "open: " _PATH_PERFMON);
115
116	if (ioctl(fd, PMIOSETUP, &pmc) < 0)
117		err(1, "ioctl(PMIOSETUP)");
118
119	if (ioctl(fd, PMIOTSTAMP, &then) < 0)
120		err(1, "ioctl(PMIOTSTAMP)");
121
122	num = 0;
123	if (ioctl(fd, PMIOSTART, &num) < 0)
124		err(1, "ioctl(PMIOSTART)");
125
126	value.pmcd_num = 0;
127	for (i = 0; i < loops; i++) {
128		if (ioctl(fd, PMIOSTOP, &num) < 0)
129			err(1, "ioctl(PMIOSTOP)");
130		if (ioctl(fd, PMIOREAD, &value) < 0)
131			err(1, "ioctl(PMIOREAD)");
132		buf[i] = value.pmcd_value;
133		if (ioctl(fd, PMIORESET, &value.pmcd_num) < 0)
134			err(1, "ioctl(PMIORESET)");
135		if (ioctl(fd, PMIOSTART, &num) < 0)
136			err(1, "ioctl(PMIOSTART)");
137		if (sleeptime)
138			sleep(sleeptime);
139		if (cmd)
140			system(cmd);
141	}
142
143	if (ioctl(fd, PMIOSTOP, &num) < 0)
144		err(1, "ioctl(PMIOSTOP)");
145	if (ioctl(fd, PMIOREAD, &value) < 0)
146		err(1, "ioctl(PMIOREAD)");
147	buf[i] = value.pmcd_value;
148	if (ioctl(fd, PMIOTSTAMP, &now) < 0)
149		err(1, "ioctl(PMIOTSTAMP)");
150
151	total = 0;
152	for (i = 1; i <= loops; i++) {
153		printf("%d: %qd\n", i, buf[i]);
154		total += buf[i];
155	}
156	printf("total: %f\nmean: %f\n", total, total / loops);
157
158	printf("clocks (at %d-MHz): %qd\n", now.pmct_rate,
159	       now.pmct_value - then.pmct_value);
160
161	return 0;
162}
163
164static int
165getnum(const char *buf, int min, int max)
166{
167	char *ep;
168	long l;
169
170	errno = 0;
171	l = strtol(buf, &ep, 0);
172	if (*buf && !*ep && !errno) {
173		if (l < min || l > max) {
174			errx(1, "%s: must be between %d and %d",
175			     buf, min, max);
176		}
177		return (int)l;
178	}
179
180	errx(1, "%s: parameter must be an integer", buf);
181}
182
183static void
184usage(const char *pname)
185{
186	fprintf(stderr,
187	"usage: %s [-eiou] [-c command] [-l nloops] [-m mask] [-s sleeptime]\n"
188	"       [-U unit] counter\n",
189		pname);
190	exit(1);
191}
192