diff --git a/src/PamController/PamController.java b/src/PamController/PamController.java
index ef1da9fa..447c876e 100644
--- a/src/PamController/PamController.java
+++ b/src/PamController/PamController.java
@@ -1434,7 +1434,7 @@ public class PamController implements PamControllerInterface, PamSettings {
 				pamControlledUnits.get(iU).flushDataBlockBuffers(2000);
 			}
 		}
-		dumpBufferStatus("In pamStopped, now idle", true);
+		dumpBufferStatus("In pamStopped, now idle", false);
 
 		// wait here until the status has changed to Pam_Idle, so that we know
 		// that we've really finished processing all data
diff --git a/src/PamguardMVC/PamDataBlock.java b/src/PamguardMVC/PamDataBlock.java
index 3bcce61a..ddc42abe 100644
--- a/src/PamguardMVC/PamDataBlock.java
+++ b/src/PamguardMVC/PamDataBlock.java
@@ -4296,6 +4296,9 @@ public class PamDataBlock<Tunit extends PamDataUnit> extends PamObservable {
 	 * @param sayEmpties dump info even if a buffer is empty (otherwise, only ones that have stuff still)
 	 */
 	public void dumpBufferStatus(String message, boolean sayEmpties) {
+		if (sayEmpties || unitsAdded > 0) {
+			System.out.printf("Datablock %s: Added %d data units\n", getLongDataName(), unitsAdded);
+		}
 		int nObs = countObservers();
 		for (int i = 0; i < nObs; i++) {
 			PamObserver obs = getPamObserver(i);
diff --git a/src/PamguardMVC/PamProcess.java b/src/PamguardMVC/PamProcess.java
index e6321207..7aafca1f 100644
--- a/src/PamguardMVC/PamProcess.java
+++ b/src/PamguardMVC/PamProcess.java
@@ -126,6 +126,8 @@ abstract public class PamProcess implements PamObserver, ProcessAnnotator {
 	private long cpuUsage;
 	private long lastCPUCheckTime = System.currentTimeMillis();
 	private double cpuPercent;
+	private double totalCPU, peakCPU;
+	private int nCPU;
 	
 	/**
 	 * Flag for the process to say whether or not it's primary data connection
@@ -140,6 +142,11 @@ abstract public class PamProcess implements PamObserver, ProcessAnnotator {
 	 * Last received data unit - used for working out timing offsets. 
 	 */
 	private PamDataUnit lastAcousticDataunit;
+
+	/*
+	 * diagnostic count of all data processed
+	 */
+	private int nDataProcessed;
 	// some flags and variables needed to deal with conversion from
 	// milliseconds to samples and back
 //	private boolean acousticDataSource = false;
@@ -742,6 +749,7 @@ abstract public class PamProcess implements PamObserver, ProcessAnnotator {
 		}
 //		long cpuStart = SystemTiming.getProcessCPUTime();
 		long threadId = Thread.currentThread().getId();
+		nDataProcessed++;
 		long cpuStart = tmxb.getThreadCpuTime(threadId);
 			newData(o, arg);
 			if (processCheck != null) {
@@ -762,6 +770,12 @@ abstract public class PamProcess implements PamObserver, ProcessAnnotator {
 			 * get percent. Total is -9+3+2 = /!0^4 !  
 			 */
 			cpuPercent = (double) cpuUsage / (now - lastCPUCheckTime) / 10000.;
+			// these next two allow us to take an average cpu. 
+			totalCPU += cpuPercent;
+			nCPU++;
+			// and hte max cpu (may always go to 100 at end ?)
+			peakCPU = Math.max(cpuPercent, peakCPU);
+			
 			lastCPUCheckTime = now;
 			cpuUsage = 0;
 		}
@@ -1073,6 +1087,9 @@ abstract public class PamProcess implements PamObserver, ProcessAnnotator {
 	 * @param sayEmpties include info even if a buffer is empty. 
 	 */
 	public void dumpBufferStatus(String message, boolean sayEmpties) {
+		if (sayEmpties || nDataProcessed > 0) {
+			System.out.printf("Process %s: ran %d datas, peak CPU %3.1f%%, mean CPU %3.1f%%\n", this.getProcessName(), nDataProcessed, peakCPU, totalCPU/nCPU);
+		}
 		ArrayList<PamDataBlock> outputs = getOutputDataBlocks();
 		try {
 			for (PamDataBlock output : outputs) {