From 2fee52bbf54a26b3957fd3b904d725066d6db0ac Mon Sep 17 00:00:00 2001
From: Wei Wang <wvw@google.com>
Date: Fri, 11 Jun 2021 15:27:01 -0700
Subject: [PATCH] Relax SurfaceFlinger cpuset and adding uclamp.min for
 RenderEngine

SurfaceFlinger IPC improved with mid and big cores, relaxing cpuset will
help improve its efficiency. For render engine, we set uclamp.min to
skip scheduling on little cores.

FWIW, we let the RT scheduler figure out what is good for perf/power.

Bug: 170507315
Bug: 191054286
Test: Build and boot
Signed-off-by: Wei Wang <wvw@google.com>
Change-Id: I880cf549e33a3a2f629e8260366c4ce8c34c3ae6
---
 conf/init.gs101.rc |  3 +++
 task_profiles.json | 44 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/conf/init.gs101.rc b/conf/init.gs101.rc
index cd08d960..89cd3d3f 100644
--- a/conf/init.gs101.rc
+++ b/conf/init.gs101.rc
@@ -664,6 +664,9 @@ on property:sys.boot_completed=1
 
     write /sys/kernel/vendor_sched/bg_group_throttle 512
 
+    # Skip little core for RT vendor_grp
+    write /sys/kernel/vendor_sched/rt_uclamp_min 125
+
     # Setup cpu.shares to throttle background group at 5%
     write /dev/cpuctl/background/cpu.shares 1024
     write /dev/cpuctl/system/cpu.shares 20480
diff --git a/task_profiles.json b/task_profiles.json
index 445ad43b..70b6b910 100644
--- a/task_profiles.json
+++ b/task_profiles.json
@@ -175,6 +175,50 @@
           }
         }
       ]
+    },
+    {
+      "Name": "SFMainPolicy",
+      "Actions": [
+        {
+          "Name": "JoinCgroup",
+          "Params":
+          {
+            "Controller": "cpuset",
+            "Path": "top-app"
+          }
+        },
+        {
+          "Name": "WriteFile",
+          "Params":
+          {
+            "FilePath": "/sys/kernel/vendor_sched/set_task_group_fg",
+            "Value": "<pid>",
+            "LogFailures": "false"
+          }
+        }
+      ]
+    },
+    {
+      "Name": "SFRenderEnginePolicy",
+      "Actions": [
+        {
+          "Name": "JoinCgroup",
+          "Params":
+          {
+            "Controller": "cpuset",
+            "Path": "top-app"
+          }
+        },
+        {
+          "Name": "WriteFile",
+          "Params":
+          {
+            "FilePath": "/sys/kernel/vendor_sched/set_task_group_rt",
+            "Value": "<pid>",
+            "LogFailures": "false"
+          }
+        }
+      ]
     }
   ]
 }