2 files changed, 7 insertions, 3 deletions

diff --git a/scripts/lib/build_perf/report.py b/scripts/lib/build_perf/report.py
index ab77424cc7..82c56830d7 100644
--- a/scripts/lib/build_perf/report.py
+++ b/scripts/lib/build_perf/report.py
@@ -294,7 +294,7 @@ class SizeVal(MeasurementVal):
             return "null"
         return self / 1024
 
-def measurement_stats(meas, prefix=''):
+def measurement_stats(meas, prefix='', time=0):
     """Get statistics of a measurement"""
     if not meas:
         return {prefix + 'sample_cnt': 0,
@@ -319,6 +319,7 @@ def measurement_stats(meas, prefix=''):
     stats['quantity'] = val_cls.quantity
     stats[prefix + 'sample_cnt'] = len(values)
 
+    start_time = time # Add start time for both type sysres and disk usage
     mean_val = val_cls(mean(values))
     min_val = val_cls(min(values))
     max_val = val_cls(max(values))
@@ -334,6 +335,7 @@ def measurement_stats(meas, prefix=''):
     stats[prefix + 'max'] = max_val
     stats[prefix + 'minus'] = val_cls(mean_val - min_val)
     stats[prefix + 'plus'] = val_cls(max_val - mean_val)
+    stats[prefix + 'start_time'] = start_time
 
     return stats
 
diff --git a/scripts/oe-build-perf-report b/scripts/oe-build-perf-report
index 7812ea4540..266700d294 100755
--- a/scripts/oe-build-perf-report
+++ b/scripts/oe-build-perf-report
@@ -336,7 +336,9 @@ def print_html_report(data, id_comp, buildstats):
                 test_i = test_data['tests'][test]
                 meas_i = test_i['measurements'][meas]
                 commit_num = get_data_item(meta, 'layers.meta.commit_count')
-                samples.append(measurement_stats(meas_i))
+                # Add start_time for both test measurement types of sysres and disk usage
+                start_time = test_i['start_time'][0]
+                samples.append(measurement_stats(meas_i, '', start_time))
                 samples[-1]['commit_num'] = commit_num
 
             absdiff = samples[-1]['val_cls'](samples[-1]['mean'] - samples[id_comp]['mean'])
@@ -473,7 +475,7 @@ Examine build performance test results from a Git repository"""
     group.add_argument('--branch', '-B', default='master', help="Branch to find commit in")
     group.add_argument('--branch2', help="Branch to find comparision revisions in")
     group.add_argument('--machine', default='qemux86')
-    group.add_argument('--history-length', default=25, type=int,
+    group.add_argument('--history-length', default=300, type=int,
                        help="Number of tested revisions to plot in html report")
     group.add_argument('--commit',
                        help="Revision to search for")