func (c *meminfoCollector) Update(ch chan<- prometheus.Metric) (err error) {
var pages map[string]C.int
pages = make(map[string]C.int)
size := C._sysctl(C.CString("vm.stats.vm.v_page_size"))
if size == -1 {
return errors.New("sysctl(vm.stats.vm.v_page_size) failed")
}
if size == -2 {
return errors.New("sysctl(vm.stats.vm.v_page_size) failed, wrong buffer size")
}
pages["active"] = C._sysctl(C.CString("vm.stats.vm.v_active_count"))
pages["inactive"] = C._sysctl(C.CString("vm.stats.vm.v_inactive_count"))
pages["wire"] = C._sysctl(C.CString("vm.stats.vm.v_wire_count"))
pages["cache"] = C._sysctl(C.CString("vm.stats.vm.v_cache_count"))
pages["free"] = C._sysctl(C.CString("vm.stats.vm.v_free_count"))
pages["swappgsin"] = C._sysctl(C.CString("vm.stats.vm.v_swappgsin"))
pages["swappgsout"] = C._sysctl(C.CString("vm.stats.vm.v_swappgsout"))
pages["total"] = C._sysctl(C.CString("vm.stats.vm.v_page_count"))
for key := range pages {
if pages[key] == -1 {
return errors.New("sysctl() failed for " + key)
}
if pages[key] == -2 {
return errors.New("sysctl() failed for " + key + ", wrong buffer size")
}
}
log.Debugf("Set node_mem: %#v", pages)
for k, v := range pages {
if _, ok := c.metrics[k]; !ok {
c.metrics[k] = prometheus.NewGauge(prometheus.GaugeOpts{
Namespace: Namespace,
Subsystem: memInfoSubsystem,
Name: k,
Help: k + " from sysctl()",
})
}
// Convert metrics to kB (same as Linux meminfo).
c.metrics[k].Set(float64(v) * float64(size))
c.metrics[k].Collect(ch)
}
return err
}
func (c *meminfoCollector) Update(ch chan<- prometheus.Metric) (err error) {
var pages map[string]C.int
pages = make(map[string]C.int)
size := C._sysctl(C.CString("vm.stats.vm.v_page_size"))
if size == -1 {
return errors.New("sysctl(vm.stats.vm.v_page_size) failed")
}
if size == -2 {
return errors.New("sysctl(vm.stats.vm.v_page_size) failed, wrong buffer size")
}
pages["active"] = C._sysctl(C.CString("vm.stats.vm.v_active_count"))
pages["inactive"] = C._sysctl(C.CString("vm.stats.vm.v_inactive_count"))
pages["wire"] = C._sysctl(C.CString("vm.stats.vm.v_wire_count"))
pages["cache"] = C._sysctl(C.CString("vm.stats.vm.v_cache_count"))
pages["free"] = C._sysctl(C.CString("vm.stats.vm.v_free_count"))
pages["swappgsin"] = C._sysctl(C.CString("vm.stats.vm.v_swappgsin"))
pages["swappgsout"] = C._sysctl(C.CString("vm.stats.vm.v_swappgsout"))
pages["total"] = C._sysctl(C.CString("vm.stats.vm.v_page_count"))
for key := range pages {
if pages[key] == -1 {
return errors.New("sysctl() failed for " + key)
}
if pages[key] == -2 {
return errors.New("sysctl() failed for " + key + ", wrong buffer size")
}
}
for k, v := range pages {
ch <- prometheus.MustNewConstMetric(
prometheus.NewDesc(
prometheus.BuildFQName(Namespace, memInfoSubsystem, k),
k+" from sysctl()",
nil, nil,
),
// Convert metrics to kB (same as Linux meminfo).
prometheus.UntypedValue, float64(v)*float64(size),
)
}
return err
}