While analyzing cache loading performance, hashing the pipeline layout was
surprisingly consuming around 4% of time, sometimes close to the cost of
hashing shader modules.
Turns out we were hashing the pipeline layout on every pipeline creation.
Considering that pipeline layouts are usually deduplicated by the
application, this was amplifying the hashing cost by a big margin.
With Graphics Pipeline Library, we do need to rebuild the pipeline layout
by combining those from each library, but we can memoize the hash of the
descriptor set layout. The cost of re-hashing hashes is negligible since
each descriptor set layout can amount to 1–2KB in size.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22254>
The spec states that descriptor set layouts can be destroyed almost
at any time:
"VkDescriptorSetLayout objects may be accessed by commands that
operate on descriptor sets allocated using that layout, and those
descriptor sets must not be updated with vkUpdateDescriptorSets
after the descriptor set layout has been destroyed. Otherwise,
descriptor set layouts can be destroyed any time they are not in
use by an API command."
Based on ANV.
Gitlab: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5893
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14621>
While ImageFormatProperties returns the number of internal descriptors,
it turns out that applications do not need to actually allocate more
descriptors in the descriptor pool.
So if we make descriptors with more planes larger we have to be
convervative and always allocate space for the larger descriptors
which is a waste given the low usage of this ext.
So let us make use of the fact that 3plane formats all have the
same formats & dimensions for the last two planes. This way we
only need the first half of the descriptor of the 3rd plane and
can share the second half of the second plane.
This allows us to use 16 bytes for the descriptor which nicely
fits into the 16 bytes that are unused right next to the sampler.
Fixes: 5564c38212 "radv: Update descriptor sets for multiple planes."
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
For example, if a pipeline has two stages VS and FS. And if only
the fragment stage needs dynamic bindings, we shouldn't allocate
an extra user SGPR for the vertex stage. Of course, if the vertex
stage loads constants, it needs an user SGPR.
This should reduce the number of SET_SH_REG packets that are emitted.
Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
In order to reduce a performance regression introduced by
4b13fe55a4 ("radv: Keep a global BO list for VkMemory."),
we are going to maintain two different paths.
One when VK_EXT_descriptor_indexing is enabled by the
application because we need to have a global BO list, and
one (the old one) when it's not enabled.
With Talos on Polaris, the global BO list reduces performance
by 10% which is too much for me.
This reverts commit ab6cadd3ec.
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This bumps the limit to the number of sets to 32, now that
we have proper support for it. It also uses 1u in a few places
to make things a bit safer.
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Needed if we want to allow them taking more than 64 KiB. The calculations
of these already used 32 bits.
Signed-off-by: Bas Nieuwenhuizen <basni@google.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
Makes more sense when we hash the layout for the pipeline cache.
Signed-off-by: Bas Nieuwenhuizen <basni@google.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
So we don't need to know about radv_sampler in ac_nir_to_llvm.
Signed-off-by: Bas Nieuwenhuizen <basni@google.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>
This squashes all the radv development up until now into
one for merging.
History can be found:
https://github.com/airlied/mesa/tree/semi-interesting
This requires llvm 3.9 and is in no way considered
a conformant vulkan implementation. It can run a number
of vulkan applications, and supports all GPUs using
the amdgpu kernel driver.
Thanks to Intel for providing anv and spirv->nir,
and Emil Velikov for reviewing build integration.
Parts of this are:
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Acked-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Authors: Bas Nieuwenhuizen and Dave Airlie
Signed-off-by: Dave Airlie <airlied@redhat.com>
