Set cpuset from surfaceflinger.
SurfaceFlinger shouldn't be limited to little cores exclusively, as the
binder threads should be placed on big cores when they are in the
critical path for a RenderThread.
bug 25745866
Change-Id: I9fb65f6d951733f91b4735ff27018411b58b2bfb
diff --git a/services/surfaceflinger/Android.mk b/services/surfaceflinger/Android.mk
index 1eb2361..1901ef9 100644
--- a/services/surfaceflinger/Android.mk
+++ b/services/surfaceflinger/Android.mk
@@ -122,6 +122,10 @@
LOCAL_CFLAGS := -DLOG_TAG=\"SurfaceFlinger\"
LOCAL_CPPFLAGS := -std=c++11
+ifneq ($(ENABLE_CPUSETS),)
+ LOCAL_CFLAGS += -DENABLE_CPUSETS
+endif
+
LOCAL_SRC_FILES := \
main_surfaceflinger.cpp
diff --git a/services/surfaceflinger/main_surfaceflinger.cpp b/services/surfaceflinger/main_surfaceflinger.cpp
index a74bc4c..6fa8b53 100644
--- a/services/surfaceflinger/main_surfaceflinger.cpp
+++ b/services/surfaceflinger/main_surfaceflinger.cpp
@@ -41,6 +41,13 @@
set_sched_policy(0, SP_FOREGROUND);
+#ifdef ENABLE_CPUSETS
+ // Put most SurfaceFlinger threads in the system-background cpuset
+ // Keeps us from unnecessarily using big cores
+ // Do this after the binder thread pool init
+ set_cpuset_policy(0, SP_SYSTEM);
+#endif
+
// initialize before clients can connect
flinger->init();