Fix part 2 of #1291

added PDH_FMT_NOCAP100 format option

closes #2483

CHANGELOG.md

@@ -74,6 +74,7 @@ be deprecated eventually.
 - [#2178](https://github.com/influxdata/telegraf/issues/2178): logparser: regexp with lookahead.
 - [#2466](https://github.com/influxdata/telegraf/issues/2466): Telegraf can crash in LoadDirectory on 0600 files.
 - [#2215](https://github.com/influxdata/telegraf/issues/2215): Iptables input: document better that rules without a comment are ignored.
+- [#2483](https://github.com/influxdata/telegraf/pull/2483): Fix win_perf_counters capping values at 100.
 
 ## v1.2.1 [2017-02-01]
 

plugins/inputs/win_perf_counters/pdh.go

@@ -331,7 +331,7 @@ func PdhCollectQueryData(hQuery PDH_HQUERY) uint32 {
 func PdhGetFormattedCounterValueDouble(hCounter PDH_HCOUNTER, lpdwType *uint32, pValue *PDH_FMT_COUNTERVALUE_DOUBLE) uint32 {
 	ret, _, _ := pdh_GetFormattedCounterValue.Call(
 		uintptr(hCounter),
-		uintptr(PDH_FMT_DOUBLE),
+		uintptr(PDH_FMT_DOUBLE|PDH_FMT_NOCAP100),
 		uintptr(unsafe.Pointer(lpdwType)),
 		uintptr(unsafe.Pointer(pValue)))
 
@@ -378,7 +378,7 @@ func PdhGetFormattedCounterValueDouble(hCounter PDH_HCOUNTER, lpdwType *uint32,
 func PdhGetFormattedCounterArrayDouble(hCounter PDH_HCOUNTER, lpdwBufferSize *uint32, lpdwBufferCount *uint32, itemBuffer *PDH_FMT_COUNTERVALUE_ITEM_DOUBLE) uint32 {
 	ret, _, _ := pdh_GetFormattedCounterArrayW.Call(
 		uintptr(hCounter),
-		uintptr(PDH_FMT_DOUBLE),
+		uintptr(PDH_FMT_DOUBLE|PDH_FMT_NOCAP100),
 		uintptr(unsafe.Pointer(lpdwBufferSize)),
 		uintptr(unsafe.Pointer(lpdwBufferCount)),
 		uintptr(unsafe.Pointer(itemBuffer)))