Add per-buffer perfetto trace points for SurfaceFlinger frame events
In order to track how buffers move through the system, we add per-buffer perfetto trace points for SurfaceFlinger.
The majority of these were already tracked through TimeStats, so the new tracing was built on top of TimeStats.
Test: atest libsurfaceflinger_unittest
Run trace with:
{ adb shell perfetto -c - --txt -o /data/misc/perfetto-traces/trace <<EOF
buffers: {
size_kb: 1280
}
data_sources: {
config {
name: "android.surfaceflinger.timestats"
}
}
duration_ms: 3000
EOF
} && adb pull /data/misc/perfetto-traces/trace ~/Desktop/trace
Change-Id: Ifb38c64a9966fece735f0ad72438c7c9c5e07baa
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index e804923..6543089 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -513,6 +513,8 @@
const nsecs_t duration = now - mBootTime;
ALOGI("Boot is finished (%ld ms)", long(ns2ms(duration)) );
+ mTimeStats->initializeTracing();
+
// wait patiently for the window manager death
const String16 name("window");
mWindowManager = defaultServiceManager()->getService(name);