static int rapl_detect_domains()

in intel_rapl_common.c [1286:1316]

• 25 lines of code
• 6 McCabe index (conditional complexity)

static int rapl_detect_domains(struct rapl_package *rp, int cpu)
{
	struct rapl_domain *rd;
	int i;

	for (i = 0; i < RAPL_DOMAIN_MAX; i++) {
		/* use physical package id to read counters */
		if (!rapl_check_domain(cpu, i, rp)) {
			rp->domain_map |= 1 << i;
			pr_info("Found RAPL domain %s\n", rapl_domain_names[i]);
		}
	}
	rp->nr_domains = bitmap_weight(&rp->domain_map, RAPL_DOMAIN_MAX);
	if (!rp->nr_domains) {
		pr_debug("no valid rapl domains found in %s\n", rp->name);
		return -ENODEV;
	}
	pr_debug("found %d domains on %s\n", rp->nr_domains, rp->name);

	rp->domains = kcalloc(rp->nr_domains + 1, sizeof(struct rapl_domain),
			      GFP_KERNEL);
	if (!rp->domains)
		return -ENOMEM;

	rapl_init_domains(rp);

	for (rd = rp->domains; rd < rp->domains + rp->nr_domains; rd++)
		rapl_detect_powerlimit(rd);

	return 0;
}