https://bugs.freedesktop.org/show_bug.cgi?id=98512
--- Comment #3 from jcamp <james.campbell at yahoo.com> ---
I followed the Arch Linux wiki on how to git bisect, and here's the result:
e5cc84dd43be066c1dd418e32f5ad258e31a150a is the first bad commit
commit e5cc84dd43be066c1dd418e32f5ad258e31a150a
Author: Brian Paul <brianp at vmware.com>
Date: Fri Sep 30 16:41:46 2016 -0600
st/mesa: optimize pipe_sampler_view validation
Before, st_get_texture_sampler_view_from_stobj() did a lot of work to
check if the texture parameters matched the sampler view (format,
swizzle, min/max lod, first/last layer, etc). We did this every time
we validated the texture state.
Now, we use a ctx->Driver.TexParameter() callback and a couple other
checks to proactively release texture views when we know that
view-related parameters have changed. Then, the validation step is
simplified:
- Search the texture's list of sampler views (just match the context).
- If found, we're done.
- Else, create a new sampler view.
There will never be old, out-of-date sampler views attached to texture
objects that we have to test.
Most apps create textures and set the texture parameters once. This
make sampler view validation much cheaper for that case.
Note that the old texture/sampler comparison code has been converted
into a set of assertions to verify that the sampler view is in fact
consistent with the texture parameters. This should help to spot any
potential regressions.
Reviewed-by: Edward O'Callaghan <funfunctor at folklore1984.net>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>
Reviewed-by: Marek Olšák <marek.olsak at amd.com>
:040000 040000 33fe9075f262c8bed745dd732cf2047238698d56
194fe6083d5e3155de216a0990d7babb5c49ee8b M src
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