/*
* CPU usage as ticks spent since last call,
* see <tt>sg_get_cpu_stats_diff(3)</tt> manpage.
*/
static VALUE
statgrab_cpu_stats_diff(VALUE self)
{
sg_cpu_stats *stats;
VALUE info, time_at;
if ((stats = sg_get_cpu_stats_diff()) == NULL)
statgrab_handle_error();
info = rb_hash_new();
rb_hash_aset(info, ID2SYM(rb_intern("user")), INT2NUM(stats->user));
rb_hash_aset(info, ID2SYM(rb_intern("kernel")),
INT2NUM(stats->kernel));
rb_hash_aset(info, ID2SYM(rb_intern("idle")), INT2NUM(stats->idle));
rb_hash_aset(info, ID2SYM(rb_intern("iowait")),
INT2NUM(stats->iowait));
rb_hash_aset(info, ID2SYM(rb_intern("swap")), INT2NUM(stats->swap));
rb_hash_aset(info, ID2SYM(rb_intern("nice")), INT2NUM(stats->nice));
rb_hash_aset(info, ID2SYM(rb_intern("systime")),
INT2NUM(stats->systime));
time_at = rb_funcall(rb_cTime, rb_intern("at"), 1,
INT2NUM(stats->systime));
rb_hash_aset(info, ID2SYM(rb_intern("time")), time_at);
return info;
}
sg_cpu_percents *sg_get_cpu_percents(){
static sg_cpu_percents cpu_usage;
#ifndef WIN32
sg_cpu_stats *cs_ptr;
cs_ptr=sg_get_cpu_stats_diff();
if(cs_ptr==NULL){
return NULL;
}
cpu_usage.user = ((float)cs_ptr->user / (float)cs_ptr->total)*100;
cpu_usage.kernel = ((float)cs_ptr->kernel / (float)cs_ptr->total)*100;
cpu_usage.idle = ((float)cs_ptr->idle / (float)cs_ptr->total)*100;
cpu_usage.iowait = ((float)cs_ptr->iowait / (float)cs_ptr->total)*100;
cpu_usage.swap = ((float)cs_ptr->swap / (float)cs_ptr->total)*100;
cpu_usage.nice = ((float)cs_ptr->nice / (float)cs_ptr->total)*100;
cpu_usage.time_taken = cs_ptr->systime;
#else
double result;
if(read_counter_double(SG_WIN32_PROC_USER, &result)) {
sg_set_error(SG_ERROR_PDHREAD, PDH_USER);
return NULL;
}
cpu_usage.user = (float)result;
if(read_counter_double(SG_WIN32_PROC_PRIV, &result)) {
sg_set_error(SG_ERROR_PDHREAD, PDH_PRIV);
return NULL;
}
cpu_usage.kernel = (float)result;
if(read_counter_double(SG_WIN32_PROC_IDLE, &result)) {
sg_set_error(SG_ERROR_PDHREAD, PDH_IDLE);
return NULL;
}
/* win2000 does not have an idle counter, but does have %activity
* so convert it to idle */
cpu_usage.idle = 100 - (float)result;
if(read_counter_double(SG_WIN32_PROC_INT, &result)) {
sg_set_error(SG_ERROR_PDHREAD, PDH_INTER);
return NULL;
}
cpu_usage.iowait = (float)result;
#endif
return &cpu_usage;
}
void populate_cpu() {
if (use_cpu_percent) {
sg_cpu_percents *cpu_p = sg_get_cpu_percents();
if (cpu_p != NULL) {
add_stat(FLOAT, &cpu_p->user,
"cpu", "user", NULL);
add_stat(FLOAT, &cpu_p->kernel,
"cpu", "kernel", NULL);
add_stat(FLOAT, &cpu_p->idle,
"cpu", "idle", NULL);
add_stat(FLOAT, &cpu_p->iowait,
"cpu", "iowait", NULL);
add_stat(FLOAT, &cpu_p->swap,
"cpu", "swap", NULL);
add_stat(FLOAT, &cpu_p->nice,
"cpu", "nice", NULL);
add_stat(TIME_T, &cpu_p->time_taken,
"cpu", "time_taken", NULL);
}
} else {
sg_cpu_stats *cpu_s;
cpu_s = use_diffs ? sg_get_cpu_stats_diff()
: sg_get_cpu_stats();
if (cpu_s != NULL) {
add_stat(LONG_LONG, &cpu_s->user,
"cpu", "user", NULL);
add_stat(LONG_LONG, &cpu_s->kernel,
"cpu", "kernel", NULL);
add_stat(LONG_LONG, &cpu_s->idle,
"cpu", "idle", NULL);
add_stat(LONG_LONG, &cpu_s->iowait,
"cpu", "iowait", NULL);
add_stat(LONG_LONG, &cpu_s->swap,
"cpu", "swap", NULL);
add_stat(LONG_LONG, &cpu_s->nice,
"cpu", "nice", NULL);
add_stat(LONG_LONG, &cpu_s->total,
"cpu", "total", NULL);
add_stat(TIME_T, &cpu_s->systime,
"cpu", "systime", NULL);
}
}
}
static void
populate_cpu(void) {
sg_cpu_stats *cpu_s;
cpu_s = use_diffs ? sg_get_cpu_stats_diff(NULL)
: sg_get_cpu_stats(NULL);
if (use_cpu_percent) {
sg_cpu_percent_source cps = use_diffs
? sg_last_diff_cpu_percent
: sg_entire_cpu_percent;
sg_cpu_percents *cpu_p = sg_get_cpu_percents_of(cps, NULL);
if (cpu_p != NULL) {
add_stat(DOUBLE, &cpu_p->user,
"cpu", "user", NULL);
add_stat(DOUBLE, &cpu_p->kernel,
"cpu", "kernel", NULL);
add_stat(DOUBLE, &cpu_p->idle,
"cpu", "idle", NULL);
add_stat(DOUBLE, &cpu_p->iowait,
"cpu", "iowait", NULL);
add_stat(DOUBLE, &cpu_p->swap,
"cpu", "swap", NULL);
add_stat(DOUBLE, &cpu_p->nice,
"cpu", "nice", NULL);
add_stat(TIME_T, &cpu_p->time_taken,
"cpu", "time_taken", NULL);
}
} else {
if (cpu_s != NULL) {
add_stat(UNSIGNED_LONG_LONG, &cpu_s->user,
"cpu", "user", NULL);
add_stat(UNSIGNED_LONG_LONG, &cpu_s->kernel,
"cpu", "kernel", NULL);
add_stat(UNSIGNED_LONG_LONG, &cpu_s->idle,
"cpu", "idle", NULL);
add_stat(UNSIGNED_LONG_LONG, &cpu_s->iowait,
"cpu", "iowait", NULL);
add_stat(UNSIGNED_LONG_LONG, &cpu_s->swap,
"cpu", "swap", NULL);
add_stat(UNSIGNED_LONG_LONG, &cpu_s->nice,
"cpu", "nice", NULL);
add_stat(UNSIGNED_LONG_LONG, &cpu_s->total,
"cpu", "total", NULL);
add_stat(TIME_T, &cpu_s->systime,
"cpu", "systime", NULL);
}
}
if (cpu_s != NULL) {
add_stat(UNSIGNED_LONG_LONG, &cpu_s->context_switches,
"cpu", "ctxsw", NULL);
add_stat(UNSIGNED_LONG_LONG, &cpu_s->voluntary_context_switches,
"cpu", "vctxsw", NULL);
add_stat(UNSIGNED_LONG_LONG, &cpu_s->involuntary_context_switches,
"cpu", "nvctxsw", NULL);
add_stat(UNSIGNED_LONG_LONG, &cpu_s->syscalls,
"cpu", "syscalls", NULL);
add_stat(UNSIGNED_LONG_LONG, &cpu_s->interrupts,
"cpu", "intrs", NULL);
add_stat(UNSIGNED_LONG_LONG, &cpu_s->soft_interrupts,
"cpu", "softintrs", NULL);
}
}
int main(int argc, char **argv){
extern char *optarg;
int c;
int delay = 1;
sg_cpu_percents *cpu_percent;
sg_cpu_stats *cpu_diff_stats;
while ((c = getopt(argc, argv, "d:")) != -1){
switch (c){
case 'd':
delay = atoi(optarg);
break;
}
}
#ifdef WIN32
delay = delay * 1000;
#endif
/* Initialise helper - e.g. logging, if any */
sg_log_init("libstatgrab-examples", "SGEXAMPLES_LOG_PROPERTIES", argc ? argv[0] : NULL);
/* Initialise statgrab */
sg_init(1);
/* XXX must be replaced by termios/(n)curses function ....
if( 0 != setvbuf(stdin, NULL, _IONBF, 0) ) {
perror("setvbuf");
exit(1);
} */
/* Drop setuid/setgid privileges. */
if (sg_drop_privileges() != SG_ERROR_NONE) {
sg_die("Error. Failed to drop privileges", 1);
}
register_sig_flagger( SIGINT, &quit );
/* Throw away the first reading as thats averaged over the machines uptime */
sg_snapshot();
cpu_percent = sg_get_cpu_percents(NULL);
if( NULL == cpu_percent )
sg_die("Failed to get cpu stats", 1);
/* Clear the screen ready for display the cpu usage */
printf("\033[2J");
while( ( ( cpu_diff_stats = sg_get_cpu_stats_diff(NULL) ) != NULL ) &&
( ( cpu_percent = sg_get_cpu_percents_of(sg_last_diff_cpu_percent, NULL) ) != NULL ) ) {
int ch;
sg_snapshot();
printf("\033[2;2H%-14s : %lld (%6.2f)", "User CPU", cpu_diff_stats->user, cpu_percent->user);
printf("\033[3;2H%-14s : %lld (%6.2f)", "Kernel CPU", cpu_diff_stats->kernel, cpu_percent->kernel);
printf("\033[4;2H%-14s : %lld (%6.2f)", "IOWait CPU", cpu_diff_stats->iowait, cpu_percent->iowait);
printf("\033[5;2H%-14s : %lld (%6.2f)", "Swap CPU", cpu_diff_stats->swap, cpu_percent->swap);
printf("\033[6;2H%-14s : %lld (%6.2f)", "Nice CPU", cpu_diff_stats->nice, cpu_percent->nice);
printf("\033[7;2H%-14s : %lld (%6.2f)", "Idle CPU", cpu_diff_stats->idle, cpu_percent->idle);
printf("\033[8;2H%-14s : %llu", "Ctxts", cpu_diff_stats->context_switches);
printf("\033[9;2H%-14s : %llu", " Voluntary", cpu_diff_stats->voluntary_context_switches);
printf("\033[10;2H%-14s : %llu", " Involuntary", cpu_diff_stats->involuntary_context_switches);
printf("\033[11;2H%-14s : %llu", "Syscalls", cpu_diff_stats->syscalls);
printf("\033[12;2H%-14s : %llu", "Intrs", cpu_diff_stats->interrupts);
printf("\033[13;2H%-14s : %llu", "SoftIntrs", cpu_diff_stats->soft_interrupts);
fflush(stdout);
ch = inp_wait(delay);
if( quit || (ch == 'q') )
break;
}
sg_shutdown();
exit(0);
}
