Vulkan: Reduce Default Descriptor Pool Max Sets

src/libANGLE/renderer/vulkan/vk_helpers.cpp

@@ -29,7 +29,7 @@ constexpr VkBufferUsageFlags kLineLoopDynamicBufferUsage =
 constexpr int kLineLoopDynamicBufferMinSize = 1024 * 1024;
 
 // This is an arbitrary max. We can change this later if necessary.
-constexpr uint32_t kDefaultDescriptorPoolMaxSets = 2048;
+constexpr uint32_t kDefaultDescriptorPoolMaxSets = 128;
 
 struct ImageMemoryBarrierData
 {

src/tests/perf_tests/ANGLEPerfTest.cpp

@@ -519,13 +519,11 @@ void ANGLERenderTest::step()
     else
     {
         drawBenchmark();
-        // Swap is needed so that the GPU driver will occasionally flush its internal command queue
-        // to the GPU. The null device benchmarks are only testing CPU overhead, so they don't need
-        // to swap.
-        if (mTestParams.eglParameters.deviceType != EGL_PLATFORM_ANGLE_DEVICE_TYPE_NULL_ANGLE)
-        {
-            mGLWindow->swap();
-        }
+        // Swap is needed so that the GPU driver will occasionally flush its
+        // internal command queue to the GPU. This is enabled for null back-end
+        // devices because some back-ends (e.g. Vulkan) also accumulate internal
+        // command queues.
+        mGLWindow->swap();
         mOSWindow->messageLoop();
     }
 }