cpu: Fetch performance counter via PDH.dll via feature toggle. (off by default) (#1627)

exporter.go

@@ -217,6 +217,10 @@ func run() int {
 
 	logger.Info("Enabled collectors: " + strings.Join(enabledCollectorList, ", "))
 
+	if utils.PDHEnabled() {
+		logger.Info("Using performance data helper from PHD.dll for performance counter collection. This is in experimental state.")
+	}
+
 	mux := http.NewServeMux()
 	mux.Handle("GET /health", httphandler.NewHealthHandler())
 	mux.Handle("GET /version", httphandler.NewVersionHandler())