diff options
| author | Simon Ser <contact@emersion.fr> | 2022-11-04 15:58:11 +0100 |
|---|---|---|
| committer | Simon Ser <contact@emersion.fr> | 2022-11-11 19:18:04 +0000 |
| commit | a8a194d695af9df4761bd894174134704ae7cebb (patch) | |
| tree | 680f2a35b6fcac3f80a1a7f8fdeae0e30ad88c5c /include | |
| parent | f92d1499cd8582949a3c08edbf3db7d4a4471360 (diff) | |
render/vulkan: switch to timeline semaphores
Up until now we were using a VkFence for GPU-to-CPU
synchronization. This has some limitations that become a blocker
when trying to have multiple command buffers in flight at once
(e.g. for multi-output). It's desirable to implement a command
buffer pool [1], but VkFence cannot be used to track command buffer
completion for individual subpasses.
Let's just switch to timeline semaphores [2], which fix this issue,
make synchronization a lot more ergonomic and are a core Vulkan 1.2
feature.
[1]: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/3802
[2]: https://www.khronos.org/blog/vulkan-timeline-semaphores
Diffstat (limited to 'include')
| -rw-r--r-- | include/render/vulkan.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/render/vulkan.h b/include/render/vulkan.h index 74df5a75..a22d224f 100644 --- a/include/render/vulkan.h +++ b/include/render/vulkan.h @@ -44,6 +44,7 @@ struct wlr_vk_device { struct { PFN_vkGetMemoryFdPropertiesKHR getMemoryFdPropertiesKHR; + PFN_vkWaitSemaphoresKHR waitSemaphoresKHR; } api; uint32_t format_prop_count; @@ -151,7 +152,8 @@ struct wlr_vk_renderer { VkPipelineLayout pipe_layout; VkSampler sampler; - VkFence fence; + VkSemaphore timeline_semaphore; + uint64_t timeline_point; struct wlr_vk_render_buffer *current_render_buffer; |