static int parse_cpu_line(char *buff)
{
char *s;
int hz_ = getenvint("HZ", 100);
if (!(s = strtok(buff + 4, " \t")))
return -1;
print_stat_value("user", s, hz_);
if (!(s = strtok(NULL, " \t")))
return -1;
print_stat_value("nice", s, hz_);
if (!(s = strtok(NULL, " \t")))
return -1;
print_stat_value("system", s, hz_);
if (!(s = strtok(NULL, " \t")))
return -1;
print_stat_value("idle", s, hz_);
if (!(s = strtok(NULL, " \t")))
return 0;
print_stat_value("iowait", s, hz_);
if (!(s = strtok(NULL, " \t")))
return 0;
print_stat_value("irq", s, hz_);
if (!(s = strtok(NULL, " \t")))
return 0;
print_stat_value("softirq", s, hz_);
if (!(s = strtok(NULL, " \t")))
return 0;
print_stat_value("steal", s, hz_);
if (!(s = strtok(NULL, " \t")))
return 0;
print_stat_value("guest", s, hz_);
return 0;
}
/* Print the name and value of a stat. */
void print_stat(const stat *s) {
switch (display_mode) {
case DISPLAY_LINUX:
printf("%s = ", s->name);
break;
case DISPLAY_BSD:
printf("%s: ", s->name);
break;
case DISPLAY_MRTG:
case DISPLAY_PLAIN:
break;
}
print_stat_value(s);
printf("\n");
}
int cpu(int argc, char **argv) {
FILE *f;
char buff[256], *s;
int ncpu=0, extinfo=0, scaleto100=0, hz;
if(argc > 1) {
if(!strcmp(argv[1], "config")) {
s = getenv("scaleto100");
if(s && !strcmp(s, "yes"))
scaleto100=1;
if(!(f=fopen(PROC_STAT, "r")))
return fail("cannot open " PROC_STAT);
while(fgets(buff, 256, f)) {
if(!strncmp(buff, "cpu", 3)) {
if(isdigit(buff[3]))
ncpu++;
if(buff[3] == ' ') {
s = strtok(buff+4, " \t");
for(extinfo=1; strtok(NULL, " \t"); extinfo++)
;
}
}
}
fclose(f);
if(ncpu < 1 || extinfo < 4)
return fail("cannot parse " PROC_STAT);
puts("graph_title CPU usage");
if(extinfo >= 7)
puts("graph_order system user nice idle iowait irq softirq");
else
puts("graph_order system user nice idle");
if(scaleto100)
puts("graph_args --base 1000 -r --lower-limit 0 --upper-limit 100");
else
printf("graph_args --base 1000 -r --lower-limit 0 --upper-limit %d\n", 100 * ncpu);
puts("graph_vlabel %\n"
"graph_scale no\n"
"graph_info This graph shows how CPU time is spent.\n"
"graph_category system\n"
"graph_period second\n"
"system.label system\n"
"system.draw AREA");
printf("system.max %d\n", 100 * ncpu);
puts("system.min 0\n"
"system.type DERIVE");
printf("system.warning %d\n", SYSWARNING * ncpu);
printf("system.critical %d\n", SYSCRITICAL * ncpu);
puts("system.info CPU time spent by the kernel in system activities\n"
"user.label user\n"
"user.draw STACK\n"
"user.min 0");
printf("user.max %d\n", 100 * ncpu);
printf("user.warning %d\n", USRWARNING * ncpu);
puts("user.type DERIVE\n"
"user.info CPU time spent by normal programs and daemons\n"
"nice.label nice\n"
"nice.draw STACK\n"
"nice.min 0");
printf("nice.max %d\n", 100 * ncpu);
puts("nice.type DERIVE\n"
"nice.info CPU time spent by nice(1)d programs\n"
"idle.label idle\n"
"idle.draw STACK\n"
"idle.min 0");
printf("idle.max %d\n", 100 * ncpu);
puts("idle.type DERIVE\n"
"idle.info Idle CPU time");
if(scaleto100)
printf("system.cdef system,%d,/\n"
"user.cdef user,%d,/\n"
"nice.cdef nice,%d,/\n"
"idle.cdef idle,%d,/\n", ncpu, ncpu, ncpu, ncpu);
if(extinfo >= 7) {
puts("iowait.label iowait\n"
"iowait.draw STACK\n"
"iowait.min 0");
printf("iowait.max %d\n", 100 * ncpu);
puts("iowait.type DERIVE\n"
"iowait.info CPU time spent waiting for I/O operations to finish\n"
"irq.label irq\n"
"irq.draw STACK\n"
"irq.min 0");
printf("irq.max %d\n", 100 * ncpu);
puts("irq.type DERIVE\n"
"irq.info CPU time spent handling interrupts\n"
"softirq.label softirq\n"
"softirq.draw STACK\n"
"softirq.min 0");
printf("softirq.max %d\n", 100 * ncpu);
puts("softirq.type DERIVE\n"
"softirq.info CPU time spent handling \"batched\" interrupts");
if(scaleto100)
printf("iowait.cdef iowait,%d,/\n"
"irq.cdef irq,%d,/\n"
"softirq.cdef softirq,%d,/\n", ncpu, ncpu, ncpu);
}
if(extinfo >= 8) {
puts("steal.label steal\n"
"steal.draw STACK\n"
"steal.min 0");
printf("steal.max %d\n", 100 * ncpu);
puts("steal.type DERIVE\n"
"steal.info The time that a virtual CPU had runnable tasks, but the virtual CPU itself was not running");
if(scaleto100)
printf("steal.cdef steal,%d,/\n", ncpu);
}
if(extinfo >= 9) {
puts("guest.label guest\n"
"guest.draw STACK\n"
"guest.min 0");
printf("guest.max %d\n", 100 * ncpu);
puts("guest.type DERIVE\n"
"guest.info The time spent running a virtual CPU for guest operating systems under the control of the Linux kernel.");
if(scaleto100)
printf("guest.cdef guest,%d,/\n", ncpu);
}
return 0;
}
if(!strcmp(argv[1], "autoconf"))
return autoconf_check_readable(PROC_STAT);
}
if(!(f=fopen(PROC_STAT, "r")))
return fail("cannot open " PROC_STAT);
hz = getenvint("HZ", 100);
while(fgets(buff, 256, f)) {
if(!strncmp(buff, "cpu ", 4)) {
fclose(f);
if(!(s = strtok(buff+4, " \t")))
break;
print_stat_value("user", s, hz);
if(!(s = strtok(NULL, " \t")))
break;
print_stat_value("nice", s, hz);
if(!(s = strtok(NULL, " \t")))
break;
print_stat_value("system", s, hz);
if(!(s = strtok(NULL, " \t")))
break;
print_stat_value("idle", s, hz);
if(!(s = strtok(NULL, " \t")))
return 0;
print_stat_value("iowait", s, hz);
if(!(s = strtok(NULL, " \t")))
return 0;
print_stat_value("irq", s, hz);
if(!(s = strtok(NULL, " \t")))
return 0;
print_stat_value("softirq", s, hz);
if(!(s = strtok(NULL, " \t")))
return 0;
print_stat_value("steal", s, hz);
if(!(s = strtok(NULL, " \t")))
return 0;
print_stat_value("guest", s, hz);
return 0;
}
}
fclose(f);
return fail("no cpu line found in " PROC_STAT);
}
