commit bf857709da3d37f335bc589de2ca10762ea469bf
author Pullakavi Srinivas <spullaka@codeaurora.org> Thu Mar 12 16:55:12 2020 +0530
committer Venkat Thogaru <vthogaru@codeaurora.org> Tue May 05 19:15:19 2020 +0530
tree 3dbc209cd178307b9a86fefaec916ae35a014cd1
parent b04fd0d5d8f10e66e5ad9ceb3ff4702082a868d2

hwc: Set real time priority to gl threads.

CRs-Fixed: 2646317
Change-Id: I2c3d984006f7b9779eb8d0c8d83bbc04734a1ecf

composer/gl_color_convert_impl.cpp

diff --git a/composer/gl_color_convert_impl.cpp b/composer/gl_color_convert_impl.cpp
index 119fffc..60c7a40 100644
--- a/composer/gl_color_convert_impl.cpp
+++ b/composer/gl_color_convert_impl.cpp
@@ -148,6 +148,8 @@
 
   ctx_.program_id = LoadProgram(1, &kVertexShader, count, fragment_shaders);
 
+  SetRealTimePriority();
+
   return 0;
 }
 

composer/gl_common.cpp

diff --git a/composer/gl_common.cpp b/composer/gl_common.cpp
index 4524867..4d4744d 100644
--- a/composer/gl_common.cpp
+++ b/composer/gl_common.cpp
@@ -173,5 +173,14 @@
   image_wrapper_.Init();
 }
 
+void GLCommon::SetRealTimePriority() {
+  // same as composer thread
+  struct sched_param param = {0};
+  param.sched_priority = 2;
+  if (sched_setscheduler(0, SCHED_FIFO | SCHED_RESET_ON_FORK, &param) != 0) {
+    DLOGE("Couldn't set SCHED_FIFO: %d", errno);
+  }
+}
+
 }  // namespace sdm
 

composer/gl_common.h

diff --git a/composer/gl_common.h b/composer/gl_common.h
index eda2d49..31961e6 100644
--- a/composer/gl_common.h
+++ b/composer/gl_common.h
@@ -65,6 +65,7 @@
   virtual int WaitOnInputFence(const shared_ptr<Fence> &in_fence);
   virtual int CreateOutputFence(shared_ptr<Fence> *out_fence);
   virtual void ClearCache();
+  virtual void SetRealTimePriority();
 
  protected:
   virtual ~GLCommon() { }

composer/gl_layer_stitch_impl.cpp

diff --git a/composer/gl_layer_stitch_impl.cpp b/composer/gl_layer_stitch_impl.cpp
index af83ab8..b0d6171 100644
--- a/composer/gl_layer_stitch_impl.cpp
+++ b/composer/gl_layer_stitch_impl.cpp
@@ -127,6 +127,8 @@
 
   ctx_.program_id = LoadProgram(1, &kVertexShader1, count, fragment_shaders);
 
+  SetRealTimePriority();
+
   return 0;
 }