1 files changed, 40 insertions, 0 deletions
diff --git a/poky/meta/classes/buildstats-summary.bbclass b/poky/meta/classes/buildstats-summary.bbclass
new file mode 100644
index 000000000..f9b241b6c
--- /dev/null
+++ b/poky/meta/classes/buildstats-summary.bbclass
@@ -0,0 +1,40 @@
+# Summarize sstate usage at the end of the build
+python buildstats_summary () {
+    import collections
+    import os.path
+
+    bsdir = e.data.expand("${BUILDSTATS_BASE}/${BUILDNAME}")
+    if not os.path.exists(bsdir):
+        return
+
+    sstatetasks = (e.data.getVar('SSTATETASKS') or '').split()
+    built = collections.defaultdict(lambda: [set(), set()])
+    for pf in os.listdir(bsdir):
+        taskdir = os.path.join(bsdir, pf)
+        if not os.path.isdir(taskdir):
+            continue
+
+        tasks = os.listdir(taskdir)
+        for t in sstatetasks:
+            no_sstate, sstate = built[t]
+            if t in tasks:
+                no_sstate.add(pf)
+            elif t + '_setscene' in tasks:
+                sstate.add(pf)
+
+    header_printed = False
+    for t in sstatetasks:
+        no_sstate, sstate = built[t]
+        if no_sstate | sstate:
+            if not header_printed:
+                header_printed = True
+                bb.note("Build completion summary:")
+
+            sstate_count = len(sstate)
+            no_sstate_count = len(no_sstate)
+            total_count = sstate_count + no_sstate_count
+            bb.note("  {0}: {1:.1f}% sstate reuse({2} setscene, {3} scratch)".format(
+                t, round(100 * sstate_count / total_count, 1), sstate_count, no_sstate_count))
+}
+addhandler buildstats_summary
+buildstats_summary[eventmask] = "bb.event.BuildCompleted"