Esempio n. 1
0
func (c *meminfoCollector) getMemInfo() (map[string]float64, error) {
	info := make(map[string]float64)

	size, err := unix.SysctlUint32("vm.stats.vm.v_page_size")
	if err != nil {
		return nil, fmt.Errorf("sysctl(vm.stats.vm.v_page_size) failed: %s", err)
	}

	for key, v := range map[string]string{
		"active":     "vm.stats.vm.v_active_count",
		"inactive":   "vm.stats.vm.v_inactive_count",
		"wire":       "vm.stats.vm.v_wire_count",
		"cache":      "vm.stats.vm.v_cache_count",
		"free":       "vm.stats.vm.v_free_count",
		"swappgsin":  "vm.stats.vm.v_swappgsin",
		"swappgsout": "vm.stats.vm.v_swappgsout",
		"total":      "vm.stats.vm.v_page_count",
	} {
		value, err := unix.SysctlUint32(v)
		if err != nil {
			return nil, err
		}
		// Convert metrics to kB (same as Linux meminfo).
		info[key] = float64(value) * float64(size)
	}
	return info, nil
}
Esempio n. 2
0
// Expose CPU stats using sysctl.
func (c *statCollector) Update(ch chan<- prometheus.Metric) (err error) {
	// We want time spent per-cpu per CPUSTATE.
	// CPUSTATES (number of CPUSTATES) is defined as 5U.
	// Order: CP_USER | CP_NICE | CP_SYS | CP_IDLE | CP_INTR
	// sysctl kern.cp_times provides hw.ncpu * CPUSTATES long integers:
	//   hw.ncpu * (space-separated list of the above variables)
	//
	// Each value is a counter incremented at frequency
	//   kern.clockrate.(stathz | hz)
	//
	// Look into sys/kern/kern_clock.c for details.

	cpuTimes, err := getCPUTimes()
	if err != nil {
		return err
	}
	for cpu, t := range cpuTimes {
		lcpu := strconv.Itoa(cpu)
		ch <- c.cpu.mustNewConstMetric(float64(t.user), lcpu, "user")
		ch <- c.cpu.mustNewConstMetric(float64(t.nice), lcpu, "nice")
		ch <- c.cpu.mustNewConstMetric(float64(t.sys), lcpu, "system")
		ch <- c.cpu.mustNewConstMetric(float64(t.intr), lcpu, "interrupt")
		ch <- c.cpu.mustNewConstMetric(float64(t.idle), lcpu, "idle")

		temp, err := unix.SysctlUint32(fmt.Sprintf("dev.cpu.%d.temperature", cpu))
		if err != nil {
			if err == unix.ENOENT {
				// No temperature information for this CPU
				log.Debugf("no temperature information for CPU %d", cpu)
			} else {
				// Unexpected error
				ch <- c.temp.mustNewConstMetric(math.NaN(), lcpu)
				log.Errorf("failed to query CPU temperature for CPU %d: %s", cpu, err)
			}
			continue
		}
		ch <- c.temp.mustNewConstMetric(float64(temp-2732)/10, lcpu)
	}
	return err
}