Mesa (master): loader/dri3: Always use at least two back buffers
Michel Dänzer
daenzer at kemper.freedesktop.org
Tue Sep 6 07:07:27 UTC 2016
Module: Mesa
Branch: master
Commit: dc3bb5db8c81e7f08ae12ea5d3ee999e2afcbfd1
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=dc3bb5db8c81e7f08ae12ea5d3ee999e2afcbfd1
Author: Michel Dänzer <michel.daenzer at amd.com>
Date: Tue Sep 6 11:34:49 2016 +0900
loader/dri3: Always use at least two back buffers
This can make a significant difference for performance with some extreme
test cases such as vblank_mode=0 glxgears.
Fixes: 1e3218bc5ba2 ("loader/dri3: Overhaul dri3_update_num_back")
Cc: "12.0 11.2" <mesa-stable at lists.freedesktop.org>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97549
Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>
Tested-by: Dieter Nützel <Dieter at nuetzel-hh.de>
---
src/loader/loader_dri3_helper.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/src/loader/loader_dri3_helper.c b/src/loader/loader_dri3_helper.c
index 86ae5ae..3ce0352 100644
--- a/src/loader/loader_dri3_helper.c
+++ b/src/loader/loader_dri3_helper.c
@@ -70,10 +70,8 @@ dri3_update_num_back(struct loader_dri3_drawable *draw)
{
if (draw->flipping)
draw->num_back = 3;
- else if (draw->vtable->get_swap_interval(draw) != 0)
- draw->num_back = 2;
else
- draw->num_back = 1;
+ draw->num_back = 2;
}
void
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