Merge branch 'features/sql-transactions-collector' of https://github.com/callvirtual/wmi_exporter into features/sql-transactions-collector

docs/collector.cpu.md

@@ -5,7 +5,8 @@ The cpu collector exposes metrics about CPU usage
 |||
 -|-
 Metric name prefix  | `cpu`
-Classes             | [`Win32_PerfRawData_PerfOS_Processor`](https://msdn.microsoft.com/en-us/library/aa394317(v=vs.90).aspx)
+Data source         | Perflib
+Counters            | `ProcessorInformation` (Windows Server 2008R2 and later) `Processor` (older versions)
 Enabled by default? | Yes
 
 ## Flags
@@ -13,6 +14,7 @@ Enabled by default? | Yes
 None
 
 ## Metrics
+These metrics are available on all versions of Windows:
 
 Name | Description | Type | Labels
 -----|-------------|------|-------
@@ -21,6 +23,16 @@ Name | Description | Type | Labels
 `wmi_cpu_interrupts_total` | Total number of received and serviced hardware interrupts | counter | `core`
 `wmi_cpu_dpcs_total` | Total number of received and serviced deferred procedure calls (DPCs) | counter | `core`
 
+These metrics are only exposed on Windows Server 2008R2 and later:
+
+Name | Description | Type | Labels
+-----|-------------|------|-------
+`wmi_cpu_clock_interrupts_total` | Total number of received and serviced clock tick interrupts | `core`
+`wmi_cpu_idle_break_events_total` | Total number of time processor was woken from idle | `core`
+`wmi_cpu_parking_status` | Parking Status represents whether a processor is parked or not | `gauge`
+`wmi_cpu_core_frequency_mhz` | Core frequency in megahertz | `gauge`
+`wmi_cpu_processor_performance` | Processor Performance is the average performance of the processor while it is executing instructions, as a percentage of the nominal performance of the processor. On some processors, Processor Performance may exceed 100% | `gauge`
+
 ### Example metric
 _This collector does not yet have explained examples, we would appreciate your help adding them!_