examples/perfmon/perfmon.c

/* $MidnightBSD$ */
/*
 * Copyright 1996 Massachusetts Institute of Technology
 *
 * Permission to use, copy, modify, and distribute this software and
 * its documentation for any purpose and without fee is hereby
 * granted, provided that both the above copyright notice and this
 * permission notice appear in all copies, that both the above
 * copyright notice and this permission notice appear in all
 * supporting documentation, and that the name of M.I.T. not be used
 * in advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.  M.I.T. makes
 * no representations about the suitability of this software for any
 * purpose.  It is provided "as is" without express or implied
 * warranty.
 * 
 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''.  M.I.T. DISCLAIMS
 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: stable/10/share/examples/perfmon/perfmon.c 253750 2013-07-28 18:44:17Z avg $
 */

#include <sys/types.h>
#include <sys/ioctl.h>

#include <machine/cpu.h>
#include <machine/perfmon.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include <unistd.h>
#include <fcntl.h>
#include <limits.h>
#include <errno.h>

static int getnum(const char *, int, int);
static void usage(const char *) __dead2;

int
main(int argc, char **argv)
{
        int c, fd, num;
        int loops, i, sleeptime;
        char *cmd;
        struct pmc pmc;
        struct pmc_tstamp then, now;
        struct pmc_data value;
        quad_t *buf;
        double total;

        pmc.pmc_num = 0;
        pmc.pmc_event = 0;
        pmc.pmc_unit = 0;
        pmc.pmc_flags = 0;
        pmc.pmc_mask = 0;
        cmd = NULL;
        loops = 50;
        sleeptime = 0;

        while ((c = getopt(argc, argv, "s:l:uoeiU:m:c:")) != -1) {
                switch(c) {
                case 'u':
                        pmc.pmc_flags |= PMCF_USR;
                        break;
                case 'o':
                        pmc.pmc_flags |= PMCF_OS;
                        break;
                case 'e':
                        pmc.pmc_flags |= PMCF_E;
                        break;
                case 'i':
                        pmc.pmc_flags |= PMCF_INV;
                        break;
                case 'U':
                        pmc.pmc_unit = getnum(optarg, 0, 256);
                        break;
                case 'm':
                        pmc.pmc_mask = getnum(optarg, 0, 256);
                        break;
                case 'l':
                        loops = getnum(optarg, 1, INT_MAX - 1);
                        break;
                case 's':
                        sleeptime = getnum(optarg, 0, INT_MAX - 1);
                        break;
                case 'c':
                        cmd = optarg;
                        break;
                default:
                        usage(argv[0]);
                }
        }

        if (argc - optind != 1)
                usage(argv[0]);

        pmc.pmc_event = getnum(argv[optind], 0, 255);

        buf = malloc((loops + 1) * sizeof *buf);
        if (!buf)
                err(1, "malloc(%lu)", (unsigned long)(loops +1) * sizeof *buf);

        fd = open(_PATH_PERFMON, O_RDWR, 0);
        if (fd < 0)
                err(1, "open: " _PATH_PERFMON);

        if (ioctl(fd, PMIOSETUP, &pmc) < 0)
                err(1, "ioctl(PMIOSETUP)");

        if (ioctl(fd, PMIOTSTAMP, &then) < 0)
                err(1, "ioctl(PMIOTSTAMP)");

        num = 0;
        if (ioctl(fd, PMIOSTART, &num) < 0)
                err(1, "ioctl(PMIOSTART)");

        value.pmcd_num = 0;
        for (i = 0; i < loops; i++) {
                if (ioctl(fd, PMIOSTOP, &num) < 0)
                        err(1, "ioctl(PMIOSTOP)");
                if (ioctl(fd, PMIOREAD, &value) < 0)
                        err(1, "ioctl(PMIOREAD)");
                buf[i] = value.pmcd_value;
                if (ioctl(fd, PMIORESET, &value.pmcd_num) < 0)
                        err(1, "ioctl(PMIORESET)");
                if (ioctl(fd, PMIOSTART, &num) < 0)
                        err(1, "ioctl(PMIOSTART)");
                if (sleeptime)
                        sleep(sleeptime);
                if (cmd)
                        system(cmd);
        }

        if (ioctl(fd, PMIOSTOP, &num) < 0)
                err(1, "ioctl(PMIOSTOP)");
        if (ioctl(fd, PMIOREAD, &value) < 0)
                err(1, "ioctl(PMIOREAD)");
        buf[i] = value.pmcd_value;
        if (ioctl(fd, PMIOTSTAMP, &now) < 0)
                err(1, "ioctl(PMIOTSTAMP)");

        total = 0;
        for (i = 1; i <= loops; i++) {
                printf("%d: %qd\n", i, buf[i]);
                total += buf[i];
        }
        printf("total: %f\nmean: %f\n", total, total / loops);

        printf("clocks (at %d-MHz): %qd\n", now.pmct_rate,
               now.pmct_value - then.pmct_value);

        return 0;
}

static int
getnum(const char *buf, int min, int max)
{
        char *ep;
        long l;

        errno = 0;
        l = strtol(buf, &ep, 0);
        if (*buf && !*ep && !errno) {
                if (l < min || l > max) {
                        errx(1, "%s: must be between %d and %d", 
                             buf, min, max);
                }
                return (int)l;
        } 

        errx(1, "%s: parameter must be an integer", buf);
}

static void
usage(const char *pname)
{
        fprintf(stderr, 
        "usage: %s [-eiou] [-c command] [-l nloops] [-m mask] [-s sleeptime]\n"
        "       [-U unit] counter\n",
                pname);
        exit(1);
}
Revision:	11821
Committed:	Thu Jul 12 23:58:42 2018 UTC (5 years, 9 months ago) by laffer1
Content type:	text/plain
File size:	4858 byte(s)
Log Message:	tag
#	Content
1	/* $MidnightBSD$ */
2	/*
3	* Copyright 1996 Massachusetts Institute of Technology
4	*
5	* Permission to use, copy, modify, and distribute this software and
6	* its documentation for any purpose and without fee is hereby
7	* granted, provided that both the above copyright notice and this
8	* permission notice appear in all copies, that both the above
9	* copyright notice and this permission notice appear in all
10	* supporting documentation, and that the name of M.I.T. not be used
11	* in advertising or publicity pertaining to distribution of the
12	* software without specific, written prior permission. M.I.T. makes
13	* no representations about the suitability of this software for any
14	* purpose. It is provided "as is" without express or implied
15	* warranty.
16	*
17	* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
18	* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
19	* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20	* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
21	* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
24	* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
25	* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
27	* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28	* SUCH DAMAGE.
29	*
30	* $FreeBSD: stable/10/share/examples/perfmon/perfmon.c 253750 2013-07-28 18:44:17Z avg $
31	*/
32
33	#include <sys/types.h>
34	#include <sys/ioctl.h>
35
36	#include <machine/cpu.h>
37	#include <machine/perfmon.h>
38
39	#include <stdio.h>
40	#include <stdlib.h>
41	#include <string.h>
42	#include <err.h>
43	#include <unistd.h>
44	#include <fcntl.h>
45	#include <limits.h>
46	#include <errno.h>
47
48	static int getnum(const char *, int, int);
49	static void usage(const char *) __dead2;
50
51	int
52	main(int argc, char **argv)
53	{
54	int c, fd, num;
55	int loops, i, sleeptime;
56	char *cmd;
57	struct pmc pmc;
58	struct pmc_tstamp then, now;
59	struct pmc_data value;
60	quad_t *buf;
61	double total;
62
63	pmc.pmc_num = 0;
64	pmc.pmc_event = 0;
65	pmc.pmc_unit = 0;
66	pmc.pmc_flags = 0;
67	pmc.pmc_mask = 0;
68	cmd = NULL;
69	loops = 50;
70	sleeptime = 0;
71
72	while ((c = getopt(argc, argv, "s:l:uoeiU:m:c:")) != -1) {
73	switch(c) {
74	case 'u':
75	pmc.pmc_flags \|= PMCF_USR;
76	break;
77	case 'o':
78	pmc.pmc_flags \|= PMCF_OS;
79	break;
80	case 'e':
81	pmc.pmc_flags \|= PMCF_E;
82	break;
83	case 'i':
84	pmc.pmc_flags \|= PMCF_INV;
85	break;
86	case 'U':
87	pmc.pmc_unit = getnum(optarg, 0, 256);
88	break;
89	case 'm':
90	pmc.pmc_mask = getnum(optarg, 0, 256);
91	break;
92	case 'l':
93	loops = getnum(optarg, 1, INT_MAX - 1);
94	break;
95	case 's':
96	sleeptime = getnum(optarg, 0, INT_MAX - 1);
97	break;
98	case 'c':
99	cmd = optarg;
100	break;
101	default:
102	usage(argv[0]);
103	}
104	}
105
106	if (argc - optind != 1)
107	usage(argv[0]);
108
109	pmc.pmc_event = getnum(argv[optind], 0, 255);
110
111	buf = malloc((loops + 1) * sizeof *buf);
112	if (!buf)
113	err(1, "malloc(%lu)", (unsigned long)(loops +1) * sizeof *buf);
114
115	fd = open(_PATH_PERFMON, O_RDWR, 0);
116	if (fd < 0)
117	err(1, "open: " _PATH_PERFMON);
118
119	if (ioctl(fd, PMIOSETUP, &pmc) < 0)
120	err(1, "ioctl(PMIOSETUP)");
121
122	if (ioctl(fd, PMIOTSTAMP, &then) < 0)
123	err(1, "ioctl(PMIOTSTAMP)");
124
125	num = 0;
126	if (ioctl(fd, PMIOSTART, &num) < 0)
127	err(1, "ioctl(PMIOSTART)");
128
129	value.pmcd_num = 0;
130	for (i = 0; i < loops; i++) {
131	if (ioctl(fd, PMIOSTOP, &num) < 0)
132	err(1, "ioctl(PMIOSTOP)");
133	if (ioctl(fd, PMIOREAD, &value) < 0)
134	err(1, "ioctl(PMIOREAD)");
135	buf[i] = value.pmcd_value;
136	if (ioctl(fd, PMIORESET, &value.pmcd_num) < 0)
137	err(1, "ioctl(PMIORESET)");
138	if (ioctl(fd, PMIOSTART, &num) < 0)
139	err(1, "ioctl(PMIOSTART)");
140	if (sleeptime)
141	sleep(sleeptime);
142	if (cmd)
143	system(cmd);
144	}
145
146	if (ioctl(fd, PMIOSTOP, &num) < 0)
147	err(1, "ioctl(PMIOSTOP)");
148	if (ioctl(fd, PMIOREAD, &value) < 0)
149	err(1, "ioctl(PMIOREAD)");
150	buf[i] = value.pmcd_value;
151	if (ioctl(fd, PMIOTSTAMP, &now) < 0)
152	err(1, "ioctl(PMIOTSTAMP)");
153
154	total = 0;
155	for (i = 1; i <= loops; i++) {
156	printf("%d: %qd\n", i, buf[i]);
157	total += buf[i];
158	}
159	printf("total: %f\nmean: %f\n", total, total / loops);
160
161	printf("clocks (at %d-MHz): %qd\n", now.pmct_rate,
162	now.pmct_value - then.pmct_value);
163
164	return 0;
165	}
166
167	static int
168	getnum(const char *buf, int min, int max)
169	{
170	char *ep;
171	long l;
172
173	errno = 0;
174	l = strtol(buf, &ep, 0);
175	if (buf && !ep && !errno) {
176	if (l < min \|\| l > max) {
177	errx(1, "%s: must be between %d and %d",
178	buf, min, max);
179	}
180	return (int)l;
181	}
182
183	errx(1, "%s: parameter must be an integer", buf);
184	}
185
186	static void
187	usage(const char *pname)
188	{
189	fprintf(stderr,
190	"usage: %s [-eiou] [-c command] [-l nloops] [-m mask] [-s sleeptime]\n"
191	" [-U unit] counter\n",
192	pname);
193	exit(1);
194	}