diff --git a/kernel-shark-qt/examples/datahisto.c b/kernel-shark-qt/examples/datahisto.c
index 3f19870..99ac495 100644
--- a/kernel-shark-qt/examples/datahisto.c
+++ b/kernel-shark-qt/examples/datahisto.c
@@ -27,18 +27,22 @@ void dump_bin(struct kshark_trace_histo *histo, int bin,
 	if (strcmp(type, "cpu") == 0) {
 		e_front = ksmodel_get_entry_front(histo, bin, true,
 						  kshark_match_cpu, val,
+						  NULL,
 						  &i_front);
 
 		e_back = ksmodel_get_entry_back(histo, bin, true,
 						kshark_match_cpu, val,
+						NULL,
 						&i_back);
 	} else if (strcmp(type, "task") == 0) {
 		e_front = ksmodel_get_entry_front(histo, bin, true,
 						  kshark_match_pid, val,
+						  NULL,
 						  &i_front);
 
 		e_back = ksmodel_get_entry_back(histo, bin, true,
 						kshark_match_pid, val,
+						NULL,
 						&i_back);
 	} else {
 		i_front = ksmodel_first_index_at_bin(histo, bin);
diff --git a/kernel-shark-qt/src/libkshark-model.c b/kernel-shark-qt/src/libkshark-model.c
index bedeb69..3138257 100644
--- a/kernel-shark-qt/src/libkshark-model.c
+++ b/kernel-shark-qt/src/libkshark-model.c
@@ -869,6 +869,7 @@ ssize_t ksmodel_first_index_at_pid(struct kshark_trace_histo *histo,
  * @param func: Matching condition function.
  * @param val: Matching condition value, used by the Matching condition
  *	       function.
+ * @param col: Optional input location for Data collection.
  * @param index: Optional output location for the index of the requested
  *		 entry inside the array.
  *
@@ -878,6 +879,7 @@ const struct kshark_entry *
 ksmodel_get_entry_front(struct kshark_trace_histo *histo,
 			int bin, bool vis_only,
 			matching_condition_func func, int val,
+			struct kshark_entry_collection *col,
 			ssize_t *index)
 {
 	struct kshark_entry_request *req;
@@ -892,7 +894,12 @@ ksmodel_get_entry_front(struct kshark_trace_histo *histo,
 	if (!req)
 		return NULL;
 
-	entry = kshark_get_entry_front(req, histo->data, index);
+	if (col && col->size)
+		entry = kshark_get_collection_entry_front(&req, histo->data,
+							  col, index);
+	else
+		entry = kshark_get_entry_front(req, histo->data, index);
+
 	free(req);
 
 	return entry;
@@ -909,6 +916,7 @@ ksmodel_get_entry_front(struct kshark_trace_histo *histo,
  * @param func: Matching condition function.
  * @param val: Matching condition value, used by the Matching condition
  *	       function.
+ * @param col: Optional input location for Data collection.
  * @param index: Optional output location for the index of the requested
  *		 entry inside the array.
  *
@@ -918,6 +926,7 @@ const struct kshark_entry *
 ksmodel_get_entry_back(struct kshark_trace_histo *histo,
 		       int bin, bool vis_only,
 		       matching_condition_func func, int val,
+		       struct kshark_entry_collection *col,
 		       ssize_t *index)
 {
 	struct kshark_entry_request *req;
@@ -932,7 +941,12 @@ ksmodel_get_entry_back(struct kshark_trace_histo *histo,
 	if (!req)
 		return NULL;
 
-	entry = kshark_get_entry_back(req, histo->data, index);
+	if (col && col->size)
+		entry = kshark_get_collection_entry_back(&req, histo->data,
+							  col, index);
+	else
+		entry = kshark_get_entry_back(req, histo->data, index);
+
 	free(req);
 
 	return entry;
@@ -963,6 +977,7 @@ static int ksmodel_get_entry_pid(const struct kshark_entry *entry)
  * @param bin: Bin id.
  * @param cpu: CPU Id.
  * @param vis_only: If true, a visible entry is requested.
+ * @param col: Optional input location for Data collection.
  * @param index: Optional output location for the index of the requested
  *		 entry inside the array.
  *
@@ -971,6 +986,7 @@ static int ksmodel_get_entry_pid(const struct kshark_entry *entry)
  */
 int ksmodel_get_pid_front(struct kshark_trace_histo *histo,
 			  int bin, int cpu, bool vis_only,
+			  struct kshark_entry_collection *col,
 			  ssize_t *index)
 {
 	const struct kshark_entry *entry;
@@ -980,7 +996,8 @@ int ksmodel_get_pid_front(struct kshark_trace_histo *histo,
 
 	entry = ksmodel_get_entry_front(histo, bin, vis_only,
 					       kshark_match_cpu, cpu,
-					       index);
+					       col, index);
+
 	return ksmodel_get_entry_pid(entry);
 }
 
@@ -993,6 +1010,7 @@ int ksmodel_get_pid_front(struct kshark_trace_histo *histo,
  * @param bin: Bin id.
  * @param cpu: CPU Id.
  * @param vis_only: If true, a visible entry is requested.
+ * @param col: Optional input location for Data collection.
  * @param index: Optional output location for the index of the requested
  *		 entry inside the array.
  *
@@ -1001,6 +1019,7 @@ int ksmodel_get_pid_front(struct kshark_trace_histo *histo,
  */
 int ksmodel_get_pid_back(struct kshark_trace_histo *histo,
 			 int bin, int cpu, bool vis_only,
+			 struct kshark_entry_collection *col,
 			 ssize_t *index)
 {
 	const struct kshark_entry *entry;
@@ -1010,7 +1029,7 @@ int ksmodel_get_pid_back(struct kshark_trace_histo *histo,
 
 	entry = ksmodel_get_entry_back(histo, bin, vis_only,
 					      kshark_match_cpu, cpu,
-					      index);
+					      col, index);
 
 	return ksmodel_get_entry_pid(entry);
 }
@@ -1040,6 +1059,7 @@ static int ksmodel_get_entry_cpu(const struct kshark_entry *entry)
  * @param bin: Bin id.
  * @param pid: Process Id.
  * @param vis_only: If true, a visible entry is requested.
+ * @param col: Optional input location for Data collection.
  * @param index: Optional output location for the index of the requested
  *		 entry inside the array.
  *
@@ -1048,6 +1068,7 @@ static int ksmodel_get_entry_cpu(const struct kshark_entry *entry)
  */
 int ksmodel_get_cpu_front(struct kshark_trace_histo *histo,
 			  int bin, int pid, bool vis_only,
+			  struct kshark_entry_collection *col,
 			  ssize_t *index)
 {
 	const struct kshark_entry *entry;
@@ -1057,6 +1078,7 @@ int ksmodel_get_cpu_front(struct kshark_trace_histo *histo,
 
 	entry = ksmodel_get_entry_front(histo, bin, vis_only,
 					       kshark_match_pid, pid,
+					       col,
 					       index);
 	return ksmodel_get_entry_cpu(entry);
 }
@@ -1070,6 +1092,7 @@ int ksmodel_get_cpu_front(struct kshark_trace_histo *histo,
  * @param bin: Bin id.
  * @param pid: Process Id.
  * @param vis_only: If true, a visible entry is requested.
+ * @param col: Optional input location for Data collection.
  * @param index: Optional output location for the index of the requested
  *		 entry inside the array.
  *
@@ -1078,6 +1101,7 @@ int ksmodel_get_cpu_front(struct kshark_trace_histo *histo,
  */
 int ksmodel_get_cpu_back(struct kshark_trace_histo *histo,
 			 int bin, int pid, bool vis_only,
+			 struct kshark_entry_collection *col,
 			 ssize_t *index)
 {
 	const struct kshark_entry *entry;
@@ -1087,6 +1111,7 @@ int ksmodel_get_cpu_back(struct kshark_trace_histo *histo,
 
 	entry = ksmodel_get_entry_back(histo, bin, vis_only,
 					      kshark_match_pid, pid,
+					      col,
 					      index);
 
 	return ksmodel_get_entry_cpu(entry);
@@ -1098,13 +1123,16 @@ int ksmodel_get_cpu_back(struct kshark_trace_histo *histo,
  * @param histo: Input location for the model descriptor.
  * @param bin: Bin id.
  * @param cpu: Cpu Id.
+ * @param col: Optional input location for Data collection.
  * @param index: Optional output location for the index of the requested
  *		 entry inside the array.
  *
  * @returns True, if a visible entry exists in this bin. Else false.
  */
 bool ksmodel_cpu_visible_event_exist(struct kshark_trace_histo *histo,
-				     int bin, int cpu, ssize_t *index)
+				     int bin, int cpu,
+				     struct kshark_entry_collection *col,
+				     ssize_t *index)
 {
 	struct kshark_entry_request *req;
 	const struct kshark_entry *entry;
@@ -1126,7 +1154,12 @@ bool ksmodel_cpu_visible_event_exist(struct kshark_trace_histo *histo,
 	 */
 	req->vis_mask = KS_EVENT_VIEW_FILTER_MASK;
 
-	entry = kshark_get_entry_front(req, histo->data, index);
+	if (col && col->size)
+		entry = kshark_get_collection_entry_front(&req, histo->data,
+							  col, index);
+	else
+		entry = kshark_get_entry_front(req, histo->data, index);
+
 	free(req);
 
 	if (!entry || !entry->visible) {
@@ -1143,13 +1176,16 @@ bool ksmodel_cpu_visible_event_exist(struct kshark_trace_histo *histo,
  * @param histo: Input location for the model descriptor.
  * @param bin: Bin id.
  * @param pid: Process Id of the task.
+ * @param col: Optional input location for Data collection.
  * @param index: Optional output location for the index of the requested
  *		 entry inside the array.
  *
  * @returns True, if a visible entry exists in this bin. Else false.
  */
 bool ksmodel_task_visible_event_exist(struct kshark_trace_histo *histo,
-				      int bin, int pid, ssize_t *index)
+				      int bin, int pid,
+				      struct kshark_entry_collection *col,
+				      ssize_t *index)
 {
 	struct kshark_entry_request *req;
 	const struct kshark_entry *entry;
@@ -1171,7 +1207,12 @@ bool ksmodel_task_visible_event_exist(struct kshark_trace_histo *histo,
 	 */
 	req->vis_mask = KS_EVENT_VIEW_FILTER_MASK;
 
-	entry = kshark_get_entry_front(req, histo->data, index);
+	if (col && col->size)
+		entry = kshark_get_collection_entry_front(&req, histo->data,
+							  col, index);
+	else
+		entry = kshark_get_entry_front(req, histo->data, index);
+
 	free(req);
 
 	if (!entry || !entry->visible) {
diff --git a/kernel-shark-qt/src/libkshark-model.h b/kernel-shark-qt/src/libkshark-model.h
index 9c80458..1cf68da 100644
--- a/kernel-shark-qt/src/libkshark-model.h
+++ b/kernel-shark-qt/src/libkshark-model.h
@@ -108,35 +108,45 @@ const struct kshark_entry *
 ksmodel_get_entry_front(struct kshark_trace_histo *histo,
 			int bin, bool vis_only,
 			matching_condition_func func, int val,
+			struct kshark_entry_collection *col,
 			ssize_t *index);
 
 const struct kshark_entry *
 ksmodel_get_entry_back(struct kshark_trace_histo *histo,
 		       int bin, bool vis_only,
 		       matching_condition_func func, int val,
+		       struct kshark_entry_collection *col,
 		       ssize_t *index);
 
 int ksmodel_get_pid_front(struct kshark_trace_histo *histo,
 			  int bin, int cpu, bool vis_only,
+			  struct kshark_entry_collection *col,
 			  ssize_t *index);
 
 int ksmodel_get_pid_back(struct kshark_trace_histo *histo,
 			 int bin, int cpu, bool vis_only,
+			 struct kshark_entry_collection *col,
 			 ssize_t *index);
 
 int ksmodel_get_cpu_front(struct kshark_trace_histo *histo,
 			  int bin, int pid, bool vis_only,
+			  struct kshark_entry_collection *col,
 			  ssize_t *index);
 
 int ksmodel_get_cpu_back(struct kshark_trace_histo *histo,
 			 int bin, int pid, bool vis_only,
+			 struct kshark_entry_collection *col,
 			 ssize_t *index);
 
 bool ksmodel_cpu_visible_event_exist(struct kshark_trace_histo *histo,
-				     int bin, int cpu, ssize_t *index);
+				     int bin, int cpu,
+				     struct kshark_entry_collection *col,
+				     ssize_t *index);
 
 bool ksmodel_task_visible_event_exist(struct kshark_trace_histo *histo,
-				      int bin, int pid, ssize_t *index);
+				      int bin, int pid,
+				      struct kshark_entry_collection *col,
+				      ssize_t *index);
 
 static inline double ksmodel_bin_time(struct kshark_trace_histo *histo,
 				      int bin)
