Add a setting to control the maximum number of accumulated GPU cmds

This helps to keep the GPU fed when processing large command buffers which don't have any syncpoints to force a flush inbetween.

app/src/main/cpp/skyline/common/android_settings.h

@@ -41,6 +41,7 @@ namespace skyline {
             gpuDriver = ktSettings.GetString("gpuDriver");
             gpuDriverLibraryName = ktSettings.GetString("gpuDriverLibraryName");
             executorSlotCountScale = ktSettings.GetInt<u32>("executorSlotCountScale");
+            executorFlushThreshold = ktSettings.GetInt<u32>("executorFlushThreshold");
             enableFastGpuReadbackHack = ktSettings.GetBool("enableFastGpuReadbackHack");
             isAudioOutputDisabled = ktSettings.GetBool("isAudioOutputDisabled");
             validationLayer = ktSettings.GetBool("validationLayer");

app/src/main/cpp/skyline/common/settings.h

@@ -73,6 +73,7 @@ namespace skyline {
         Setting<std::string> gpuDriver; //!< The label of the GPU driver to use
         Setting<std::string> gpuDriverLibraryName; //!< The name of the GPU driver library to use
         Setting<u32> executorSlotCountScale; //!< Number of GPU executor slots that can be used concurrently
+        Setting<u32> executorFlushThreshold; //!< Number of commands that need to accumulate before they're flushed to the GPU
 
         // Hacks
         Setting<bool> enableFastGpuReadbackHack; //!< If the CPU texture readback skipping hack should be used

app/src/main/cpp/skyline/gpu/interconnect/command_executor.cpp

@@ -367,6 +367,9 @@ namespace skyline::gpu::interconnect {
             slot->nodes.emplace_back(std::in_place_type_t<node::NextSubpassFunctionNode>(), std::forward<decltype(function)>(function));
         else
             slot->nodes.emplace_back(std::in_place_type_t<node::SubpassFunctionNode>(), std::forward<decltype(function)>(function));
+
+        if (slot->nodes.size() > *state.settings->executorFlushThreshold && !gotoNext)
+            Submit();
     }
 
     void CommandExecutor::AddOutsideRpCommand(std::function<void(vk::raii::CommandBuffer &, const std::shared_ptr<FenceCycle> &, GPU &)> &&function) {

app/src/main/java/emu/skyline/utils/NativeSettings.kt

@@ -27,6 +27,7 @@ class NativeSettings(context : Context, pref : PreferenceSettings) {
     var gpuDriver : String = if (pref.gpuDriver == PreferenceSettings.SYSTEM_GPU_DRIVER) "" else pref.gpuDriver
     var gpuDriverLibraryName : String = if (pref.gpuDriver == PreferenceSettings.SYSTEM_GPU_DRIVER) "" else GpuDriverHelper.getLibraryName(context, pref.gpuDriver)
     var executorSlotCountScale : Int = pref.executorSlotCountScale
+    var executorFlushThreshold : Int = pref.executorFlushThreshold
 
     // Hacks
     var enableFastGpuReadbackHack : Boolean = pref.enableFastGpuReadbackHack

app/src/main/java/emu/skyline/utils/PreferenceSettings.kt

@@ -40,6 +40,7 @@ class PreferenceSettings @Inject constructor(@ApplicationContext private val con
     // GPU
     var gpuDriver by sharedPreferences(context, SYSTEM_GPU_DRIVER)
     var executorSlotCountScale by sharedPreferences(context, 6)
+    var executorFlushThreshold by sharedPreferences(context, 256)
     var forceMaxGpuClocks by sharedPreferences(context, false)
 
     // Hacks

app/src/main/res/values/strings.xml

@@ -77,6 +77,8 @@
     <string name="respect_display_cutout_disabled">Allow UI elements to be drawn in the cutout area</string>
     <string name="executor_slot_count_scale">Executor Slot Count Scale</string>
     <string name="executor_slot_count_scale_desc">Scale controlling the maximum number of simultaneous GPU executions (Higher may sometimes perform better but will use more RAM)</string>
+    <string name="executor_flush_threshold">Executor Flush Threshold</string>
+    <string name="executor_flush_threshold_desc">Controls how frequently work is flushed to the GPU</string>
     <string name="force_max_gpu_clocks">Force Maximum GPU Clocks</string>
     <string name="force_max_gpu_clocks_desc">Forces the GPU to run at its maximum possible clock speed (May cause excessive heating and power usage)</string>
     <string name="force_max_gpu_clocks_desc_unsupported">Your device does not support forcing maximum GPU clocks</string>

app/src/main/res/xml/preferences.xml

@@ -138,6 +138,14 @@
             app:key="executor_slot_count_scale"
             app:title="@string/executor_slot_count_scale"
             app:showSeekBarValue="true" />
+        <SeekBarPreference
+            android:min="0"
+            android:defaultValue="256"
+            android:max="1024"
+            android:summary="@string/executor_flush_threshold_desc"
+            app:key="executor_flush_threshold"
+            app:title="@string/executor_flush_threshold"
+            app:showSeekBarValue="true" />
         <CheckBoxPreference
             android:defaultValue="false"
             android:summary="@string/force_max_gpu_clocks_desc"