diff --git a/src/sysprof/sysprof-marks-section.c b/src/sysprof/sysprof-marks-section.c
index 2cac2efa..9ee2af91 100644
--- a/src/sysprof/sysprof-marks-section.c
+++ b/src/sysprof/sysprof-marks-section.c
@@ -24,6 +24,7 @@
 #include "sysprof-mark-chart.h"
 #include "sysprof-mark-table.h"
 #include "sysprof-marks-section.h"
+#include "sysprof-sampled-model.h"
 #include "sysprof-session-model.h"
 #include "sysprof-session-model-item.h"
 #include "sysprof-time-series.h"
@@ -80,6 +81,7 @@ sysprof_marks_section_class_init (SysprofMarksSectionClass *klass)
   g_type_ensure (SYSPROF_TYPE_MARK_CATALOG);
   g_type_ensure (SYSPROF_TYPE_MARK_CHART);
   g_type_ensure (SYSPROF_TYPE_MARK_TABLE);
+  g_type_ensure (SYSPROF_TYPE_SAMPLED_MODEL);
   g_type_ensure (SYSPROF_TYPE_SESSION_MODEL);
   g_type_ensure (SYSPROF_TYPE_SESSION_MODEL_ITEM);
   g_type_ensure (SYSPROF_TYPE_TIME_SERIES);
diff --git a/src/sysprof/sysprof-marks-section.ui b/src/sysprof/sysprof-marks-section.ui
index 580191e2..33312a3d 100644
--- a/src/sysprof/sysprof-marks-section.ui
+++ b/src/sysprof/sysprof-marks-section.ui
@@ -36,19 +36,24 @@
                     <property name="series">
                       <object class="SysprofTimeSeries">
                         <property name="model">
-                          <object class="SysprofTimeFilterModel">
-                            <binding name="time-span">
-                              <lookup name="visible-time" type="SysprofSession">
-                                <lookup name="session">SysprofMarksSection</lookup>
-                              </lookup>
-                            </binding>
-                            <binding name="model">
-                              <lookup name="marks" type="SysprofDocument">
-                                <lookup name="document" type="SysprofSession">
-                                  <lookup name="session">SysprofMarksSection</lookup>
-                                </lookup>
-                              </lookup>
-                            </binding>
+                          <object class="SysprofSampledModel">
+                            <property name="max-items">1000</property>
+                            <property name="model">
+                              <object class="SysprofTimeFilterModel">
+                                <binding name="time-span">
+                                  <lookup name="visible-time" type="SysprofSession">
+                                    <lookup name="session">SysprofMarksSection</lookup>
+                                  </lookup>
+                                </binding>
+                                <binding name="model">
+                                  <lookup name="marks" type="SysprofDocument">
+                                    <lookup name="document" type="SysprofSession">
+                                      <lookup name="session">SysprofMarksSection</lookup>
+                                    </lookup>
+                                  </lookup>
+                                </binding>
+                              </object>
+                            </property>
                           </object>
                         </property>
                         <property name="begin-time-expression">