在无法发出信号的信号量上等待的 Vulkan 队列

Question

我似乎有一段时间有无效的代码，但验证层是静默的。在将我的sdk更新到最新版本后，我开始出现以下错误：

Message ID name: VUID-vkQueuePresentKHR-pWaitSemaphores-03268
Message: [ VUID-vkQueuePresentKHR-pWaitSemaphores-03268 ] Object: 0x55b4b87478f0 (Name = Selected logical device : Type = 3) | VkQueue 0x55b4b8224020[Main queue] is waiting on VkSemaphore 0x110000000011[Render Finished Semaphore: 0] that has no way to be signaled. The Vulkan spec states: All elements of the pWaitSemaphores member of pPresentInfo must reference a semaphore signal operation that has been submitted for execution and any semaphore signal operations on which it depends (if any) must have also been submitted for execution. (https://www.khronos.org/registry/vulkan/specs/1.1-extensions/html/vkspec.html#VUID-vkQueuePresentKHR-pWaitSemaphores-03268)
Severity: VK_DEBUG_UTILS_MESSAGE_SEVERITY_ERROR_BIT_EXT

这发生在我的主绘制循环中，这是我代码中唯一的验证层错误。如果我从不调用负责表面表示的代码。我没有任何错误。

我确信我做错事情的地方就在这里：

void DisplayTarget::StartPass(uint target_num, bool should_clear,
VulkanImage* external_depth)
{
auto device = h_interface->GetDevice();
auto result = device.acquireNextImageKHR(
*swap_chain,
std::numeric_limits<uint64_t>::max(),
*img_available_sems[current_frame],
nullptr,
&active_image_index);
if(result != vk::Result::eSuccess)
Log::RecordLog("Failed to acquire image");
}
vk::Result DisplayTarget::EndPass()
{
auto device         = h_interface->GetDevice();
auto cmd_buff       = h_interface->GetCmdBuffer();
auto graphics_queue = h_interface->GetQueue();
device.waitForFences(
1,
&*in_flight_fences[current_frame],
VK_TRUE,
std::numeric_limits<uint64_t>::max());
vk::Semaphore wait_semaphores[]      = {*img_available_sems[current_frame]};
vk::PipelineStageFlags wait_stages[] = {
vk::PipelineStageFlagBits::eColorAttachmentOutput};
vk::Semaphore signal_semaphores[] = {*render_finished_sems[current_frame]};
vk::SubmitInfo submit_info(
1, wait_semaphores, wait_stages, 1, &cmd_buff, 1, signal_semaphores);
device.resetFences(1, &*in_flight_fences[current_frame]);
auto result =
graphics_queue.submit(1, &submit_info, *in_flight_fences[current_frame]);
if(result != vk::Result::eSuccess)
Log::RecordLog("Failed to submit draw command buffer!");
graphics_queue.waitIdle();
device.waitIdle();
vk::SwapchainKHR swap_chains[] = {*swap_chain};
vk::PresentInfoKHR present_info = {};
present_info.waitSemaphoreCount = 1;
present_info.pWaitSemaphores = signal_semaphores;
present_info.swapchainCount = 1;
present_info.pSwapchains = swap_chains;
present_info.pImageIndices = &active_image_index;
result = graphics_queue.presentKHR(&present_info);
current_frame = (current_frame + 1) % MAX_FRAMES_IN_FLIGHT;
return result;
}

目前，它们被连续调用：

display.StartPass();        
display.EndPass();

为了使事情正常工作，我尝试了注释这两个函数的部分或更改调用顺序，但要么错误仍然存在，要么我得到了不同的验证错误。

我还试着直接向信号量发出信号：

vk::SemaphoreSignalInfo semaphore_info = {};
semaphore_info.semaphore = *render_finished_sems[current_frame];
semaphore_info.value = 0;
device.signalSemaphore(semaphore_info);

但我所做的只是造成的分段故障

Answer 1

错误在于操作顺序。这是错误的：

graphics_queue.waitIdle();
device.waitIdle();
vk::SwapchainKHR swap_chains[] = {*swap_chain};
vk::PresentInfoKHR present_info = {};
present_info.waitSemaphoreCount = 1;
present_info.pWaitSemaphores = signal_semaphores;
present_info.swapchainCount = 1;
present_info.pSwapchains = swap_chains;
present_info.pImageIndices = &active_image_index;
result = graphics_queue.presentKHR(&present_info);
current_frame = (current_frame + 1) % MAX_FRAMES_IN_FLIGHT;

这是正确的用法：

vk::SwapchainKHR swap_chains[] = {*swap_chain};
vk::PresentInfoKHR present_info = {};
present_info.waitSemaphoreCount = 1;
present_info.pWaitSemaphores = signal_semaphores;
present_info.swapchainCount = 1;
present_info.pSwapchains = swap_chains;
present_info.pImageIndices = &active_image_index;
result = graphics_queue.presentKHR(&present_info);
current_frame = (current_frame + 1) % MAX_FRAMES_IN_FLIGHT;
graphics_queue.waitIdle();
device.waitIdle();