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Allow use of counter time in win perf counters (#4267)

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This commit is contained in:
Vlasta Hajek
2018-06-30 04:01:28 +02:00
committed by Daniel Nelson
parent b2e972cd81
commit ed2bc1151b
7 changed files with 330 additions and 94 deletions
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40
plugins/inputs/win_perf_counters/pdh.go
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@@ -38,12 +38,15 @@ import (
"unsafe"
"golang.org/x/sys/windows"
"time"
)
// Error codes
const (
ERROR_SUCCESS = 0
ERROR_INVALID_FUNCTION = 1
ERROR_SUCCESS = 0
ERROR_FAILURE = 1
ERROR_INVALID_FUNCTION = 1
EPOCH_DIFFERENCE_MICROS int64 = 11644473600000000
)
type (
@@ -170,6 +173,7 @@ var (
pdh_AddEnglishCounterW *syscall.Proc
pdh_CloseQuery *syscall.Proc
pdh_CollectQueryData *syscall.Proc
pdh_CollectQueryDataWithTime *syscall.Proc
pdh_GetFormattedCounterValue *syscall.Proc
pdh_GetFormattedCounterArrayW *syscall.Proc
pdh_OpenQuery *syscall.Proc
@@ -187,6 +191,7 @@ func init() {
pdh_AddEnglishCounterW, _ = libpdhDll.FindProc("PdhAddEnglishCounterW") // XXX: only supported on versions > Vista.
pdh_CloseQuery = libpdhDll.MustFindProc("PdhCloseQuery")
pdh_CollectQueryData = libpdhDll.MustFindProc("PdhCollectQueryData")
pdh_CollectQueryDataWithTime, _ = libpdhDll.FindProc("PdhCollectQueryDataWithTime")
pdh_GetFormattedCounterValue = libpdhDll.MustFindProc("PdhGetFormattedCounterValue")
pdh_GetFormattedCounterArrayW = libpdhDll.MustFindProc("PdhGetFormattedCounterArrayW")
pdh_OpenQuery = libpdhDll.MustFindProc("PdhOpenQuery")
@@ -303,6 +308,37 @@ func PdhCollectQueryData(hQuery PDH_HQUERY) uint32 {
return uint32(ret)
}
// PdhCollectQueryDataWithTime queries data from perfmon, retrieving the device/windows timestamp from the node it was collected on.
// Converts the filetime structure to a GO time class and returns the native time.
//
func PdhCollectQueryDataWithTime(hQuery PDH_HQUERY) (uint32, time.Time) {
var localFileTime FILETIME
ret, _, _ := pdh_CollectQueryDataWithTime.Call(uintptr(hQuery), uintptr(unsafe.Pointer(&localFileTime)))
if ret == ERROR_SUCCESS {
var utcFileTime FILETIME
ret, _, _ := krn_LocalFileTimeToFileTime.Call(
uintptr(unsafe.Pointer(&localFileTime)),
uintptr(unsafe.Pointer(&utcFileTime)))
if ret == 0 {
return uint32(ERROR_FAILURE), time.Now()
}
// First convert 100-ns intervals to microseconds, then adjust for the
// epoch difference
var totalMicroSeconds int64
totalMicroSeconds = ((int64(utcFileTime.dwHighDateTime) << 32) | int64(utcFileTime.dwLowDateTime)) / 10
totalMicroSeconds -= EPOCH_DIFFERENCE_MICROS
retTime := time.Unix(0, totalMicroSeconds*1000)
return uint32(ERROR_SUCCESS), retTime
}
return uint32(ret), time.Now()
}
// PdhGetFormattedCounterValueDouble formats the given hCounter using a 'double'. The result is set into the specialized union struct pValue.
// This function does not directly translate to a Windows counterpart due to union specialization tricks.
func PdhGetFormattedCounterValueDouble(hCounter PDH_HCOUNTER, lpdwType *uint32, pValue *PDH_FMT_COUNTERVALUE_DOUBLE) uint32 {