venus: move feedback on empty last batch to prior batch
For submissions with an empty last batch containing no cmd buffers but
with semaphores as zink does, adding feedback to that batch would make
it no longer empty and increase submission overhead on some drivers.
Since feedback order is enforced by barriers, the feedback cmds can
instead be appended to the previous batch (if it exists) so that the
last batch remains empty.
Signed-off-by: Juston Li <justonli@google.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27830>
3 files changed
