kc3-lang/angle

2019-11-25T10:22:01

Vulkan: fix BufferVk::map() synchronization 4398b2b6a2ac13034dff249d8c049c4047b5fed2 made finishToSerial() in BufferVk::map() conditional to whether the serial is in use to work around a performance regression. Notes: - Prior to 087f1384f233792921d34c0ca5b5a90fac75b070, finishToSerial already did that, but that check was inadvertently removed. - finishToSerial waits for the smallest serial that's bigger than or equal to the requested serial. - The flush() call in BufferVk::map() was conditional to whether the serial is in use, but it really meant to check whether the buffer has pending commands in the graph. The end result is that there was an unnecessary flush in BufferVk::map() if we had to wait for a previous serial to finish. This change makes the flush conditional to whether the buffer has pending commands in the graph, and the finishToSerial call to whether the serial is not yet finished. Bug: angleproject:3994 Change-Id: Idca436ef2439bcc8c59396a07b2591c1dfadd669 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1932341 Reviewed-by: Brandon Schade <b.schade@samsung.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>