commit c3659fbf6548898a9f1ccf72420e4a82b630cf25
author Tim Murray <timmurray@google.com> Fri Jun 17 14:02:16 2016 -0700
committer The Android Automerger <android-build@google.com> Thu Jul 07 14:59:19 2016 -0700
tree 56eb95ead034cce4049037e03bbe35fbc92bd2be
parent c661fe139a4c7c82ab1fd37697b41f7832364fa0

Update FIFO settings for new uses of FIFO.

Adjust FIFO timings as well as allow SurfaceFlinger to use FIFO.

bug 24503801

Change-Id: I2c21d4c1788777c2d0d77227bb872701b35c4ff6

libcutils/fs_config.c

diff --git a/libcutils/fs_config.c b/libcutils/fs_config.c
index 840ac86..08db7dc 100644
--- a/libcutils/fs_config.c
+++ b/libcutils/fs_config.c
@@ -142,6 +142,9 @@
     { 00750, AID_ROOT,      AID_SHELL,     CAP_MASK_LONG(CAP_SETUID) | CAP_MASK_LONG(CAP_SETGID), "system/bin/run-as" },
     { 00700, AID_SYSTEM,    AID_SHELL,     CAP_MASK_LONG(CAP_BLOCK_SUSPEND), "system/bin/inputflinger" },
 
+    /* Support FIFO scheduling mode in SurfaceFlinger. */
+    { 00755, AID_SYSTEM,    AID_GRAPHICS,     CAP_MASK_LONG(CAP_SYS_NICE), "system/bin/surfaceflinger" },
+
     { 00750, AID_ROOT,      AID_ROOT,      0, "system/bin/uncrypt" },
     { 00750, AID_ROOT,      AID_ROOT,      0, "system/bin/install-recovery.sh" },
     { 00755, AID_ROOT,      AID_SHELL,     0, "system/bin/*" },

rootdir/init.rc

diff --git a/rootdir/init.rc b/rootdir/init.rc
index 3da836c..da3b98b 100644
--- a/rootdir/init.rc
+++ b/rootdir/init.rc
@@ -136,16 +136,17 @@
     chown system system /dev/cpuctl/tasks
     chmod 0666 /dev/cpuctl/tasks
     write /dev/cpuctl/cpu.shares 1024
-    write /dev/cpuctl/cpu.rt_runtime_us 800000
     write /dev/cpuctl/cpu.rt_period_us 1000000
+    write /dev/cpuctl/cpu.rt_runtime_us 950000
 
     mkdir /dev/cpuctl/bg_non_interactive
     chown system system /dev/cpuctl/bg_non_interactive/tasks
     chmod 0666 /dev/cpuctl/bg_non_interactive/tasks
     # 5.0 %
     write /dev/cpuctl/bg_non_interactive/cpu.shares 52
-    write /dev/cpuctl/bg_non_interactive/cpu.rt_runtime_us 700000
     write /dev/cpuctl/bg_non_interactive/cpu.rt_period_us 1000000
+    # active FIFO threads will never be in BG
+    write /dev/cpuctl/bg_non_interactive/cpu.rt_runtime_us 10000
 
     # sets up initial cpusets for ActivityManager
     mkdir /dev/cpuset