From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxx>
A small set of drm_syncobj optimisations which should make things a tiny bit
more efficient on the CPU side of things.
Improvement seems to be around 1.5%* more FPS if observed with "vkgears
-present-mailbox" on a Steam Deck Plasma desktop, but I am reluctant to make a
definitive claim on the numbers since there is some run to run variance. It
would be best if someone could verify or suggest a more heavy workload for
syncobjs.
*)
Before average fps after 200s: 22102
After: 22426
Tvrtko Ursulin (7):
drm/syncobj: Remove unhelpful helper
drm/syncobj: Do not allocate an array to store zeros when waiting
drm/syncobj: Avoid one temporary allocation in drm_syncobj_array_find
drm/syncobj: Use put_user in drm_syncobj_query_ioctl
drm/syncobj: Avoid temporary allocation in
drm_syncobj_timeline_signal_ioctl
drm/syncobj: Add a fast path to drm_syncobj_array_wait_timeout
drm/syncobj: Add a fast path to drm_syncobj_array_find
drivers/gpu/drm/drm_syncobj.c | 281 ++++++++++++++++++----------------
1 file changed, 147 insertions(+), 134 deletions(-)
--
2.47.1
