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system: fix uptime calculation, fixes #40

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This commit is contained in:
Martin Lindhe
2016-11-15 09:07:04 +01:00
parent b40d60b8a4
commit a3f44f60c5
1 changed files with 6 additions and 2 deletions
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8
collector/system.go
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@@ -55,7 +55,7 @@ func NewSystemCollector() (Collector, error) {
), ),
SystemUpTime: prometheus.NewDesc( SystemUpTime: prometheus.NewDesc(
prometheus.BuildFQName(Namespace, subsystem, "system_up_time"), prometheus.BuildFQName(Namespace, subsystem, "system_up_time"),
"PerfOS_System.SystemUpTime", "SystemUpTime/Frequency_Object",
nil, nil,
nil, nil,
), ),
@@ -81,10 +81,12 @@ func (c *SystemCollector) Collect(ch chan<- prometheus.Metric) error {
type Win32_PerfRawData_PerfOS_System struct { type Win32_PerfRawData_PerfOS_System struct {
ContextSwitchesPersec uint32 ContextSwitchesPersec uint32
ExceptionDispatchesPersec uint32 ExceptionDispatchesPersec uint32
Frequency_Object uint64
ProcessorQueueLength uint32 ProcessorQueueLength uint32
SystemCallsPersec uint32 SystemCallsPersec uint32
SystemUpTime uint64 SystemUpTime uint64
Threads uint32 Threads uint32
Timestamp_Object uint64
} }
func (c *SystemCollector) collect(ch chan<- prometheus.Metric) (*prometheus.Desc, error) { func (c *SystemCollector) collect(ch chan<- prometheus.Metric) (*prometheus.Desc, error) {
@@ -92,6 +94,7 @@ func (c *SystemCollector) collect(ch chan<- prometheus.Metric) (*prometheus.Desc
if err := wmi.Query(wmi.CreateQuery(&dst, ""), &dst); err != nil { if err := wmi.Query(wmi.CreateQuery(&dst, ""), &dst); err != nil {
return nil, err return nil, err
} }
ch <- prometheus.MustNewConstMetric( ch <- prometheus.MustNewConstMetric(
c.ContextSwitchesTotal, c.ContextSwitchesTotal,
prometheus.GaugeValue, prometheus.GaugeValue,
@@ -115,7 +118,8 @@ func (c *SystemCollector) collect(ch chan<- prometheus.Metric) (*prometheus.Desc
ch <- prometheus.MustNewConstMetric( ch <- prometheus.MustNewConstMetric(
c.SystemUpTime, c.SystemUpTime,
prometheus.GaugeValue, prometheus.GaugeValue,
float64(dst[0].SystemUpTime), // convert from Windows timestamp (1 jan 1601) to unix timestamp (1 jan 1970)
float64(dst[0].SystemUpTime-116444736000000000)/float64(dst[0].Frequency_Object),
) )
ch <- prometheus.MustNewConstMetric( ch <- prometheus.MustNewConstMetric(
c.Threads, c.Threads,