Small error fix

analytics/analyzers/smucngperfanalyzer/SMUCNGPerfAnalyzer.cpp

@@ -43,7 +43,7 @@ void SMUCNGPerfAnalyzer::compute(U_Ptr unit) {
 			vector<reading_t> * bufferClocks = nullptr;
 			bufferClocks = _queryEngine.querySensor(inputs[_metricToPosition[SMUCSensorBase::CLOCKS]]->getName(), timestamp, timestamp, bufferClocks, false); //use absolute timestamp
 			vector<reading_t> * bufferClockRef = nullptr;
-			bufferClockRef =	_queryEngine.querySensor(inputs[_metricToPosition[SMUCSensorBase::CLOCKS]]->getName(), timestamp, timestamp, bufferClockRef, false); //use absolute timestamp
+			bufferClockRef =	_queryEngine.querySensor(inputs[_metricToPosition[SMUCSensorBase::CLOCKS_REF]]->getName(), timestamp, timestamp, bufferClockRef, false); //use absolute timestamp
 			reading_t frequency;
 			bool wascalced = calculateFrequency(*(bufferClockRef->begin()),*(bufferClocks->begin()), MIN_FREQ_MHZ, MAX_FREQ_MHZ, frequency);
 			delete bufferClocks;