Proves out the viability of this style of implementation. Ideally we'd
have a more officially sanctioned way of doing similar things later :)
Unfortunately, the overhead removal is too great to ignore on target
platform. Makes use of a private (reserved) extension for now ...
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Elden Ring does not detect the proper error code and create a new
pipeline library. Instead, create a fresh new library, which works
around the issue.
The game has a pattern of LoadPipeline -> if fail -> CreatePSO ->
StorePipeline. Sometimes, in the same process it will LoadLibrary from
its own cache (could explain some stutters),
so it's very useful to have this either way.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Just like handling min/maxImageExtent of 0, we can just fall back to
user buffers.
Elden Ring hits this case on application teardown.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Elden Ring in particular spam frees and allocates command pools despite
this being a very bad idea.
Add a simple 8-entry cache which seems to take care of it.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
We can mark a descriptor as being SINGLE_DESCRIPTOR, which means we
only need one descriptor copy. This way, we can avoid doing somewhat
expensive work (every nanosecond counts here):
- Bitscan loop
- Read deep into d3d12_device guts (often a cache miss). The memory
index depends on the bitscan, which causes bubble.
When we have a single descriptor, we can just store the binding
information inline and avoid this jank.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Tune memory layout so that we can deduce various information without
making a single pointer dereference:
- d3d12_descriptor_heap*
- heap offset
- Pointer to various side data structures we need to keep around.
Instead of having one big 64 byte data structure with tons of padding,
tune it down to 32 + 8 bytes per descriptor of extra dummy data.
To make all of this work, use a somewhat clever encoding scheme for CPU
VA where lower bits store number of active bits used to encode
descriptor offset. From there, we can mask away bits to recover
d3d12_descriptor_heap. Metadata is stored inline in one big allocation,
and we can just offset from there based on extracted log2i_ceil(descriptor count).
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
For cases where games spam committed allocations and don't use
NOT_ZEROED. We still rely on zerovram behavior for initial backing which
should be enough in most cases.
Strictly speaking however, we are forced to clear the allocations every
time if application does not use the flag correctly.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
This is a more principled limit since that's the huge page size.
Avoids some allocation spam.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Forgot to offset buffer offset. Fun!
Found when bumping VA allocation limit to 2 MiB instead of 1 MiB.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Useful for Intel since Intel hardware cannot support more than 1M
descriptors in general, and opting in to correct behavior should improve
CPU overhead as well when copying descriptors.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
The common path that we really need to optimize for is CBV_SRV_UAV +
Simple + 1 descriptor.
Descriptor benchmark shows an almost 50% reduction in overhead now.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Checking for pNext here is too brittle and causes crashes when dynamic
rendering path is added.
Also need to chain in existing pNexts.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
This became basically a rewrite in the end, and it got too awkward to
split these commits in any meaningful way.
The goals here were primarily to:
- Support serializing SPIR-V and load SPIR-V.
To do this robustly requires a lot more validation and checks to make
sure end up compiling the same SPIR-V that we load from cache.
This is critical for performance when games have primed their pipeline
libraries and expect that loading a PSO should be fast. Without this,
we will hit vkd3d-shader for every PSO, causing very long load times.
- Implement the required validation for mismatched PSO descriptions.
- Rewrite the binary layout of the pipeline library for flexibility
concerns and performance.
If the pipeline library is mmap-ed from disk - which appears to be
the intended use - we only need to scan through the TOC to fully parse
the library contents.
From a flexibility concern, a blob needs to support inlined data,
but a library can use referential links. We introduce separate
hashmaps which store deduplicated SPIR-V and pipeline cache blobs,
which significantly drop memory and storage requirements.
For future improvements, it should be fairly easy to add information
which lets us avoid SPIR-V or pipeline cache data altogether if
relevant changes to Vulkan/drivers are made.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
WARNING: You should add the boolean check kwarg to the run_command call.
It currently defaults to false,
but it will default to true in future releases of meson.
Signed-off-by: Georg Lehmann <dadschoorse@gmail.com>
Useful when used together with pipeline library logging. Confirms that
we can load pipeline caches as expected.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
To be used for upcoming disk driver cache implementation which needs to
live on a thread.
Need a separate wrapper since pthread and SRWLock interface is quite
different. Similar rationale as rwlock_t.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Additionally, add option to ignore cached SPIR-V.
Will be useful for debugging, and also required for VKD3D_SHADER_OVERRIDE.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Avoids saving out pipeline cache blobs which are likely going to be
cached by on-disk cache anyways.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
For pipeline libraries and DXR to some extent later, we'll need an easy
way to compare root signature objects.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Similar issue with this as with NULL DSV rendering test. We did not test
the scenario where RTV is bound, then it is not bound anymore with same
PSO.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
We did not test the scenario where we first render with depth enabled,
and then bind a NULL DSV with the same pipeline.
Also fix issues if we bind NULL RTVs with same pipeline bound.
Fixes crash in Guardians of the Galaxy.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
This is benign and easily gets spammed a TON.
We will warn if an indexed draw is actually made like this.
Signed-off-by: Hans-Kristian Arntzen <post@arntzen-software.no>
Hans-Kristian Arntzen
Mike Blumenkrantz
Joshua Ashton
Georg Lehmann
Krzysztof Bogacki