2 files changed, 15 insertions, 3 deletions
diff --git a/indra/llcommon/lltracerecording.cpp b/indra/llcommon/lltracerecording.cpp
index 2150a44f12..9fce6c11cc 100644
--- a/indra/llcommon/lltracerecording.cpp
+++ b/indra/llcommon/lltracerecording.cpp
@@ -252,6 +252,11 @@ U32 Recording::getSampleCount( const TraceType<CountAccumulator>& stat )
 	return mBuffers->mCounts[stat.getIndex()].getSampleCount();
 }
 
+bool Recording::hasValue(const TraceType<SampleAccumulator>& stat)
+{
+	return mBuffers->mSamples[stat.getIndex()].hasValue();
+}
+
 F64 Recording::getMin( const TraceType<SampleAccumulator>& stat )
 {
 	return mBuffers->mSamples[stat.getIndex()].getMin();
@@ -578,7 +583,10 @@ F64 PeriodicRecording::getPeriodMin( const TraceType<SampleAccumulator>& stat, s
 	for (S32 i = 1; i <= num_periods; i++)
 	{
 		S32 index = (mCurPeriod + total_periods - i) % total_periods;
-		min_val = llmin(min_val, mRecordingPeriods[index].getMin(stat));
+		if (mRecordingPeriods[index].hasValue(stat))
+		{
+			min_val = llmin(min_val, mRecordingPeriods[index].getMin(stat));
+		}
 	}
 	return min_val;
 }
@@ -592,7 +600,10 @@ F64 PeriodicRecording::getPeriodMax(const TraceType<SampleAccumulator>& stat, si
 	for (S32 i = 1; i <= num_periods; i++)
 	{
 		S32 index = (mCurPeriod + total_periods - i) % total_periods;
-		max_val = llmax(max_val, mRecordingPeriods[index].getMax(stat));
+		if (mRecordingPeriods[index].hasValue(stat))
+		{
+			max_val = llmax(max_val, mRecordingPeriods[index].getMax(stat));
+		}
 	}
 	return max_val;
 }
@@ -611,7 +622,7 @@ F64 PeriodicRecording::getPeriodMean( const TraceType<SampleAccumulator>& stat,
 	for (S32 i = 1; i <= num_periods; i++)
 	{
 		S32 index = (mCurPeriod + total_periods - i) % total_periods;
-		if (mRecordingPeriods[index].getDuration() > 0.f)
+		if (mRecordingPeriods[index].getDuration() > 0.f && mRecordingPeriods[index].hasValue(stat))
 		{
 			LLUnit<F64, LLUnits::Seconds> recording_duration = mRecordingPeriods[index].getDuration();
 			mean += mRecordingPeriods[index].getMean(stat) * recording_duration.value();
diff --git a/indra/llcommon/lltracerecording.h b/indra/llcommon/lltracerecording.h
index f5e4ea603c..51b411b7bd 100644
--- a/indra/llcommon/lltracerecording.h
+++ b/indra/llcommon/lltracerecording.h
@@ -209,6 +209,7 @@ namespace LLTrace
 
 
 		// SampleStatHandle accessors
+		bool hasValue(const TraceType<SampleAccumulator>& stat);
 		F64 getMin(const TraceType<SampleAccumulator>& stat);
 		template <typename T>
 		T getMin(const SampleStatHandle<T>& stat)