diff --git a/tools/tracing/rtla/src/timerlat_hist.c b/tools/tracing/rtla/src/timerlat_hist.c
index 8b66387..4403cc4 100644
--- a/tools/tracing/rtla/src/timerlat_hist.c
+++ b/tools/tracing/rtla/src/timerlat_hist.c
@@ -282,6 +282,21 @@ static void timerlat_hist_header(struct osnoise_tool *tool)
 }
 
 /*
+ * format_summary_value - format a line of summary value (min, max or avg)
+ * of hist data
+ */
+static void format_summary_value(struct trace_seq *seq,
+				 int count,
+				 unsigned long long val,
+				 bool avg)
+{
+	if (count)
+		trace_seq_printf(seq, "%9llu ", avg ? val / count : val);
+	else
+		trace_seq_printf(seq, "%9c ", '-');
+}
+
+/*
  * timerlat_print_summary - print the summary of the hist data to the output
  */
 static void
@@ -328,29 +343,23 @@ timerlat_print_summary(struct timerlat_hist_params *params,
 		if (!data->hist[cpu].irq_count && !data->hist[cpu].thread_count)
 			continue;
 
-		if (!params->no_irq) {
-			if (data->hist[cpu].irq_count)
-				trace_seq_printf(trace->seq, "%9llu ",
-						data->hist[cpu].min_irq);
-			else
-				trace_seq_printf(trace->seq, "        - ");
-		}
+		if (!params->no_irq)
+			format_summary_value(trace->seq,
+					     data->hist[cpu].irq_count,
+					     data->hist[cpu].min_irq,
+					     false);
 
-		if (!params->no_thread) {
-			if (data->hist[cpu].thread_count)
-				trace_seq_printf(trace->seq, "%9llu ",
-						data->hist[cpu].min_thread);
-			else
-				trace_seq_printf(trace->seq, "        - ");
-		}
+		if (!params->no_thread)
+			format_summary_value(trace->seq,
+					     data->hist[cpu].thread_count,
+					     data->hist[cpu].min_thread,
+					     false);
 
-		if (params->user_hist) {
-			if (data->hist[cpu].user_count)
-				trace_seq_printf(trace->seq, "%9llu ",
-						data->hist[cpu].min_user);
-			else
-				trace_seq_printf(trace->seq, "        - ");
-		}
+		if (params->user_hist)
+			format_summary_value(trace->seq,
+					     data->hist[cpu].user_count,
+					     data->hist[cpu].min_user,
+					     false);
 	}
 	trace_seq_printf(trace->seq, "\n");
 
@@ -364,29 +373,23 @@ timerlat_print_summary(struct timerlat_hist_params *params,
 		if (!data->hist[cpu].irq_count && !data->hist[cpu].thread_count)
 			continue;
 
-		if (!params->no_irq) {
-			if (data->hist[cpu].irq_count)
-				trace_seq_printf(trace->seq, "%9llu ",
-						 data->hist[cpu].sum_irq / data->hist[cpu].irq_count);
-			else
-				trace_seq_printf(trace->seq, "        - ");
-		}
+		if (!params->no_irq)
+			format_summary_value(trace->seq,
+					     data->hist[cpu].irq_count,
+					     data->hist[cpu].sum_irq,
+					     true);
 
-		if (!params->no_thread) {
-			if (data->hist[cpu].thread_count)
-				trace_seq_printf(trace->seq, "%9llu ",
-						 data->hist[cpu].sum_thread / data->hist[cpu].thread_count);
-			else
-				trace_seq_printf(trace->seq, "        - ");
-		}
+		if (!params->no_thread)
+			format_summary_value(trace->seq,
+					     data->hist[cpu].thread_count,
+					     data->hist[cpu].sum_thread,
+					     true);
 
-		if (params->user_hist) {
-			if (data->hist[cpu].user_count)
-				trace_seq_printf(trace->seq, "%9llu ",
-						 data->hist[cpu].sum_user / data->hist[cpu].user_count);
-			else
-				trace_seq_printf(trace->seq, "        - ");
-		}
+		if (params->user_hist)
+			format_summary_value(trace->seq,
+					     data->hist[cpu].user_count,
+					     data->hist[cpu].sum_user,
+					     true);
 	}
 	trace_seq_printf(trace->seq, "\n");
 
@@ -400,29 +403,23 @@ timerlat_print_summary(struct timerlat_hist_params *params,
 		if (!data->hist[cpu].irq_count && !data->hist[cpu].thread_count)
 			continue;
 
-		if (!params->no_irq) {
-			if (data->hist[cpu].irq_count)
-				trace_seq_printf(trace->seq, "%9llu ",
-						 data->hist[cpu].max_irq);
-			else
-				trace_seq_printf(trace->seq, "        - ");
-		}
+		if (!params->no_irq)
+			format_summary_value(trace->seq,
+					     data->hist[cpu].irq_count,
+					     data->hist[cpu].max_irq,
+					     false);
 
-		if (!params->no_thread) {
-			if (data->hist[cpu].thread_count)
-				trace_seq_printf(trace->seq, "%9llu ",
-						data->hist[cpu].max_thread);
-			else
-				trace_seq_printf(trace->seq, "        - ");
-		}
+		if (!params->no_thread)
+			format_summary_value(trace->seq,
+					     data->hist[cpu].thread_count,
+					     data->hist[cpu].max_thread,
+					     false);
 
-		if (params->user_hist) {
-			if (data->hist[cpu].user_count)
-				trace_seq_printf(trace->seq, "%9llu ",
-						data->hist[cpu].max_user);
-			else
-				trace_seq_printf(trace->seq, "        - ");
-		}
+		if (params->user_hist)
+			format_summary_value(trace->seq,
+					     data->hist[cpu].user_count,
+					     data->hist[cpu].max_user,
+					     false);
 	}
 	trace_seq_printf(trace->seq, "\n");
 	trace_seq_do_printf(trace->seq);
@@ -506,16 +503,22 @@ timerlat_print_stats_all(struct timerlat_hist_params *params,
 		trace_seq_printf(trace->seq, "min:  ");
 
 	if (!params->no_irq)
-		trace_seq_printf(trace->seq, "%9llu ",
-				 sum.min_irq);
+		format_summary_value(trace->seq,
+				     sum.irq_count,
+				     sum.min_irq,
+				     false);
 
 	if (!params->no_thread)
-		trace_seq_printf(trace->seq, "%9llu ",
-				 sum.min_thread);
+		format_summary_value(trace->seq,
+				     sum.thread_count,
+				     sum.min_thread,
+				     false);
 
 	if (params->user_hist)
-		trace_seq_printf(trace->seq, "%9llu ",
-				 sum.min_user);
+		format_summary_value(trace->seq,
+				     sum.user_count,
+				     sum.min_user,
+				     false);
 
 	trace_seq_printf(trace->seq, "\n");
 
@@ -523,16 +526,22 @@ timerlat_print_stats_all(struct timerlat_hist_params *params,
 		trace_seq_printf(trace->seq, "avg:  ");
 
 	if (!params->no_irq)
-		trace_seq_printf(trace->seq, "%9llu ",
-				 sum.sum_irq / sum.irq_count);
+		format_summary_value(trace->seq,
+				     sum.irq_count,
+				     sum.sum_irq,
+				     true);
 
 	if (!params->no_thread)
-		trace_seq_printf(trace->seq, "%9llu ",
-				 sum.sum_thread / sum.thread_count);
+		format_summary_value(trace->seq,
+				     sum.thread_count,
+				     sum.sum_thread,
+				     true);
 
 	if (params->user_hist)
-		trace_seq_printf(trace->seq, "%9llu ",
-				 sum.sum_user / sum.user_count);
+		format_summary_value(trace->seq,
+				     sum.user_count,
+				     sum.sum_user,
+				     true);
 
 	trace_seq_printf(trace->seq, "\n");
 
@@ -540,16 +549,22 @@ timerlat_print_stats_all(struct timerlat_hist_params *params,
 		trace_seq_printf(trace->seq, "max:  ");
 
 	if (!params->no_irq)
-		trace_seq_printf(trace->seq, "%9llu ",
-				 sum.max_irq);
+		format_summary_value(trace->seq,
+				     sum.irq_count,
+				     sum.max_irq,
+				     false);
 
 	if (!params->no_thread)
-		trace_seq_printf(trace->seq, "%9llu ",
-				 sum.max_thread);
+		format_summary_value(trace->seq,
+				     sum.thread_count,
+				     sum.max_thread,
+				     false);
 
 	if (params->user_hist)
-		trace_seq_printf(trace->seq, "%9llu ",
-				 sum.max_user);
+		format_summary_value(trace->seq,
+				     sum.user_count,
+				     sum.max_user,
+				     false);
 
 	trace_seq_printf(trace->seq, "\n");
 	trace_seq_do_printf(trace->seq);