Commit bb7a2c63 authored by Hui Su's avatar Hui Su Committed by Jonathan Corbet

docs/cpu-load: format the example code.

format the example code.
Signed-off-by: default avatarHui Su <sh_def@163.com>
Link: https://lore.kernel.org/r/20201018170557.GA7670@rlkSigned-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent 4fb220da
......@@ -61,43 +61,46 @@ will lead to quite erratic information inside ``/proc/stat``::
static volatile sig_atomic_t stop;
static void sighandler (int signr)
static void sighandler(int signr)
{
(void) signr;
stop = 1;
(void) signr;
stop = 1;
}
static unsigned long hog (unsigned long niters)
{
stop = 0;
while (!stop && --niters);
return niters;
stop = 0;
while (!stop && --niters);
return niters;
}
int main (void)
{
int i;
struct itimerval it = { .it_interval = { .tv_sec = 0, .tv_usec = 1 },
.it_value = { .tv_sec = 0, .tv_usec = 1 } };
sigset_t set;
unsigned long v[HIST];
double tmp = 0.0;
unsigned long n;
signal (SIGALRM, &sighandler);
setitimer (ITIMER_REAL, &it, NULL);
hog (ULONG_MAX);
for (i = 0; i < HIST; ++i) v[i] = ULONG_MAX - hog (ULONG_MAX);
for (i = 0; i < HIST; ++i) tmp += v[i];
tmp /= HIST;
n = tmp - (tmp / 3.0);
sigemptyset (&set);
sigaddset (&set, SIGALRM);
for (;;) {
hog (n);
sigwait (&set, &i);
}
return 0;
int i;
struct itimerval it = {
.it_interval = { .tv_sec = 0, .tv_usec = 1 },
.it_value = { .tv_sec = 0, .tv_usec = 1 } };
sigset_t set;
unsigned long v[HIST];
double tmp = 0.0;
unsigned long n;
signal(SIGALRM, &sighandler);
setitimer(ITIMER_REAL, &it, NULL);
hog (ULONG_MAX);
for (i = 0; i < HIST; ++i) v[i] = ULONG_MAX - hog(ULONG_MAX);
for (i = 0; i < HIST; ++i) tmp += v[i];
tmp /= HIST;
n = tmp - (tmp / 3.0);
sigemptyset(&set);
sigaddset(&set, SIGALRM);
for (;;) {
hog(n);
sigwait(&set, &i);
}
return 0;
}
......
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