vulkan: dispatch to the worker every 32 draws, wake it only when it waits

Every 8 draws the GPU thread handed a command chunk to the Vulkan worker and woke it
with a system call (~2% of the GPU thread at ~55,000 draws a second). Chunks now go
every 32 draws (a full chunk still goes on its own), and the worker is woken only
when it is waiting; a busy worker pops the queue before waiting again.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/video_core/renderer_vulkan/vk_rasterizer.cpp b/src/video_core/renderer_vulkan/vk_rasterizer.cpp
index 429b2d63ef..b5837e6a55 100644
--- a/src/video_core/renderer_vulkan/vk_rasterizer.cpp
+++ b/src/video_core/renderer_vulkan/vk_rasterizer.cpp
@@ -1309,8 +1309,10 @@ void RasterizerVulkan::FlushWork() {
     static constexpr u32 DRAWS_TO_DISPATCH = 512;
     static constexpr u32 CHECK_MASK = 3;
 #else
+    // Every 32 draws (was 8): each dispatch woke the worker thread, and Switch 2 titles make
+    // ~55,000 draws a second. A full chunk is dispatched on its own (Scheduler::Record).
     static constexpr u32 DRAWS_TO_DISPATCH = 4096;
-    static constexpr u32 CHECK_MASK = 7;
+    static constexpr u32 CHECK_MASK = 31;
 #endif // __ANDROID__
 
     static_assert(DRAWS_TO_DISPATCH % (CHECK_MASK + 1) == 0);