Merge "Fix render thread priority for allocateBuffers" into main

Author: Shadman Shadid

libs/gui/BLASTBufferQueue.cpp

@@ -937,15 +937,22 @@ class BBQSurface : public Surface {
           : Surface(igbp, controlledByApp, scHandle), mBbq(bbq) {}
 
     void allocateBuffers() override {
+        ATRACE_CALL();
         uint32_t reqWidth = mReqWidth ? mReqWidth : mUserWidth;
         uint32_t reqHeight = mReqHeight ? mReqHeight : mUserHeight;
         auto gbp = getIGraphicBufferProducer();
-        std::thread ([reqWidth, reqHeight, gbp=getIGraphicBufferProducer(),
-                      reqFormat=mReqFormat, reqUsage=mReqUsage] () {
+        std::thread allocateThread([reqWidth, reqHeight, gbp = getIGraphicBufferProducer(),
+                                    reqFormat = mReqFormat, reqUsage = mReqUsage]() {
+            if (com_android_graphics_libgui_flags_allocate_buffer_priority()) {
+                androidSetThreadName("allocateBuffers");
+                pid_t tid = gettid();
+                androidSetThreadPriority(tid, ANDROID_PRIORITY_DISPLAY);
+            }
+
             gbp->allocateBuffers(reqWidth, reqHeight,
                                  reqFormat, reqUsage);
-
-        }).detach();
+        });
+        allocateThread.detach();
     }
 
     status_t setFrameRate(float frameRate, int8_t compatibility,

libs/gui/libgui_flags.aconfig

@@ -142,3 +142,14 @@ flag {
   bug: "340934031"
   is_fixed_read_only: true
 } # wb_media_migration
+
+flag {
+  name: "allocate_buffer_priority"
+  namespace: "wear_system_health"
+  description: "Boost priority for buffer allocation"
+  bug: "399701430"
+  metadata {
+    purpose: PURPOSE_BUGFIX
+  }
+  is_fixed_read_only: true
+} # allocate_buffer_priority