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/*
* 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.
*
* $FreeBSD$
*/
#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;
} else if(errno) {
errx(1, "`%s': must be between %ld and %ld",
LONG_MIN, LONG_MAX);
}
errx(1, "`%s': parameter must be an integer");
}
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);
}
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