Commit af0301a8f85a6c1dbb879d7db6925515914ab7bd
2019-04-09T10:43:04
Vulkan: fix CPU throttling frames to 2 Previously, the CPU was throttled to be at most N frames ahead, N being the number of swapchain images. N is now fixed to 2, regardless of the number of swapchain images. If N < 2, we would be stalling the CPU unnecessarily, and if N > 2, the CPU could get too far ahead. Effectively, here is how the throttling plays out with this commit: Submit (Fence 1) + Present Submit (Fence 2) + Present Wait Fence 1 Submit (Fence 3) + Present Wait Fence 2 Submit (Fence 4) + Present Wait Fence 3 Submit (Fence 5) + Present Wait Fence 4 ... Bug: angleproject:2942 Change-Id: I3b8c3bb88e52d62231306ec84aad50d2bf472d8c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1558681 Reviewed-by: Ian Elliott <ianelliott@google.com> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>