submit first so the GPU already has work by the time the CPU resumes

src/Cafe/HW/Latte/Renderer/Vulkan/VulkanRenderer.cpp

@@ -2640,6 +2640,7 @@ bool VulkanRenderer::AcquireNextSwapchainImage(bool mainWindow)
 	if (!UpdateSwapchainProperties(mainWindow))
 		return false;
 
+	//	std::cout << "acquire" << std::endl;
 	bool result = chainInfo.AcquireImage();
 	if (!result)
 		return false;
@@ -2732,14 +2733,17 @@ void VulkanRenderer::SwapBuffer(bool mainWindow)
 		ClearColorImageRaw(chainInfo.m_swapchainImages[chainInfo.swapchainImageIndex], 0, 0, clearColor, VK_IMAGE_LAYOUT_UNDEFINED, VK_IMAGE_LAYOUT_PRESENT_SRC_KHR);
 	}
 
-	WaitCommandBufferFinished(m_commandBufferIDOfPrevFrame);
-	m_commandBufferIDOfPrevFrame = GetCurrentCommandBufferId();
+	const size_t currentFrameCmdBufferID = GetCurrentCommandBufferId();
 
 	VkSemaphore presentSemaphore = chainInfo.m_presentSemaphores[chainInfo.swapchainImageIndex];
 	SubmitCommandBuffer(presentSemaphore); // submit all command and signal semaphore
 
 	cemu_assert_debug(m_numSubmittedCmdBuffers > 0);
 
+	// wait for the previous frame to finish rendering.
+	WaitCommandBufferFinished(m_commandBufferIDOfPrevFrame);
+	m_commandBufferIDOfPrevFrame = currentFrameCmdBufferID;
+
 	VkPresentIdKHR presentId = {};
 
 	VkPresentInfoKHR presentInfo = {};
@@ -2769,6 +2773,7 @@ void VulkanRenderer::SwapBuffer(bool mainWindow)
 		}
 	}
 
+	//	std::cout << "swap" << std::endl;
 	VkResult result = vkQueuePresentKHR(m_presentQueue, &presentInfo);
 	if (result < 0 && result != VK_ERROR_OUT_OF_DATE_KHR)
 	{