int main(void) {
xenstat_handle *handle = xenstat_init();
if(!handle) {
fputs("Internal error in xenstats, failed to initialize handle\n", stderr);
exit(1);
}
xenstat_node *node = xenstat_get_node(handle, XENSTAT_ALL);
if(!node) {
fputs("Failed to get statistics from libxenlight\n", stderr);
exit(2);
}
printf("<<<xen_info>>>\n");
printf("version\t%s\n", xenstat_node_xen_version(node));
printf("total_memory\t%llu\n", xenstat_node_tot_mem(node));
printf("free_memory\t%llu\n", xenstat_node_free_mem(node));
// printf("freeable_memory\t%li\n", xenstat_node_freeable_mb(node));
printf("cpu_amount\t%i\n", xenstat_node_num_cpus(node));
printf("cpu_speed\t%llu\n", xenstat_node_cpu_hz(node));
int domains_amount = xenstat_node_num_domains(node);
if(!domains_amount) exit(0);
printf("domains\t%i\n", domains_amount);
xenstat_domain** domains = malloc(sizeof(xenstat_domain*) * domains_amount);
for(int i=0; i<domains_amount; i++) {
xenstat_domain* domain = xenstat_node_domain_by_index(node, i);
if(xenstat_domain_id(domain)) {
printf("<<<<%s>>>>\n", xenstat_domain_name(domain));
} else{ printf("<<<<>>>>\n"); }
printf("<<<xen_domain>>>\n");
printf("id\t%u\n", xenstat_domain_id(domain));
}
return 0;
}
/* Computes the CPU percentage used for a specified domain */
static double get_cpu_pct(xenstat_domain *domain)
{
xenstat_domain *old_domain;
double us_elapsed;
/* Can't calculate CPU percentage without a previous sample. */
if(prev_node == NULL)
return 0.0;
old_domain = xenstat_node_domain(prev_node, xenstat_domain_id(domain));
if(old_domain == NULL)
return 0.0;
/* Calculate the time elapsed in microseconds */
us_elapsed = ((curtime.tv_sec-oldtime.tv_sec)*1000000.0
+(curtime.tv_usec - oldtime.tv_usec));
/* In the following, nanoseconds must be multiplied by 1000.0 to
* convert to microseconds, then divided by 100.0 to get a percentage,
* resulting in a multiplication by 10.0 */
return ((xenstat_domain_cpu_ns(domain)
-xenstat_domain_cpu_ns(old_domain))/10.0)/us_elapsed;
}