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Implemented `-c command'.

Browse Source 
Fixed bitrot (__dead went away; EOF is now wrong for the getopt failure
value).

Moved sleep command to the end of the main loop to avoid mismatch between
main loop and the report loop.  There is an extra iteration that could be
used to calibrate the loop overhead, but was used to report wrong results.

Fixed usage message.
This commit is contained in:
Bruce Evans 1997-06-29 22:43:01 +00:00
parent 32721aad4f
commit 9018a5cb58
1 changed files with 15 additions and 7 deletions
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22
share/examples/perfmon/perfmon.c
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@ -26,7 +26,7 @@
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
* $Id: perfmon.c,v 1.3 1997/02/22 13:55:58 peter Exp $
*/
#include <sys/types.h>
@ -45,13 +45,14 @@
#include <errno.h>
static int getnum(const char *, int, int);
static void __dead usage(const char *) __dead2;
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;
@ -63,10 +64,11 @@ main(int argc, char **argv)
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:")) != EOF) {
while ((c = getopt(argc, argv, "s:l:uoeiU:m:c:")) != -1) {
switch(c) {
case 'u':
pmc.pmc_flags |= PMCF_USR;
@ -92,6 +94,9 @@ main(int argc, char **argv)
case 's':
sleeptime = getnum(optarg, 0, INT_MAX - 1);
break;
case 'c':
cmd = optarg;
break;
default:
usage(argv[0]);
}
@ -122,8 +127,6 @@ main(int argc, char **argv)
value.pmcd_num = 0;
for (i = 0; i < loops; i++) {
if (sleeptime)
sleep(sleeptime);
if (ioctl(fd, PMIOSTOP, &num) < 0)
err(1, "ioctl(PMIOSTOP)");
if (ioctl(fd, PMIOREAD, &value) < 0)
@ -133,6 +136,10 @@ main(int argc, char **argv)
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)
@ -181,7 +188,8 @@ static void
usage(const char *pname)
{
fprintf(stderr,
"%s: usage:\n\t%s [-eiou] [-l nloops] [-U unit] [-m mask] "
"counter\n", pname, pname);
"usage: %s [-eiou] [-c command] [-l nloops] [-m mask] [-s sleeptime]\n"
" [-U unit] counter\n",
pname);
exit(1);
}