Imported BOs are not allocated by the device so we don't
update BO stats when they are imported. Therefore, we should
not be updating them when they are freed either.
Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19675>
Until now we have lived without a refcount mechanism in the driver
because in Vulkan the user is responsible for handling the life
span of memory allocations for all Vulkan objects, however,
imported BOs are tricky because the kernel doesn't refcount
so user-space needs to make sure that:
1. When importing a BO into the same device used to create it
(self-importing) it does not double free the same BO.
2. Frees imported BOs that were not allocated through the same
device.
Our initial implementation always freed BOs when requested,
so we handled 2) correctly but not 1) and we would double-free
self-imported BOs. We tried to fix that in commit d809d9f3
but that broke 2) and we started to leak BOs for some imports.
This fixes the problem for good by adding refcounts to BOs
so that self-imported BOs have a refcnt > 1 and are only freed
when all references are freed.
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5769
Tested-by: Roman Stratiienko <r.stratiienko@gmail.com>
Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14392>
Heavily based on the already existing for the v3d OpenGL driver, but
without references, and with some extra OOM checks (Vulkan CTS has
several OOM tests).
With this commit v3dv_bo_alloc and v3dv_bo_free became frontends to
the bo_cache. The former tries to get a BO from the cache if possible,
and the latter stores the BO on the cache if possible. The former also
adds a new parameter to point if the BO to allocate is private.
As v3d we are only caching private BOs, those created by the driver
for internal use (like CLs, tile_alloc, etc). They are the ones with
the highest change of being reused (for example, CL BOs are always
4KB, so they can always be reused). User-created BOs can have any
size, including some very large ones for buffers and images, which
makes them far less likely to be reused and would add a lot of memory
pressure if we decided to cache them.
In any case, in practice, we found that we could get a performance
improvement by caching also user-created BOs, but that would need more
care and an analysis to decide which ones makes sense. Would also
require to change how the cached BOs are stored by size. Right now
there are an array of list_head, that doesn't work well with big
BOs. If done, that would be handled on a separate commit.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>
This is only used when doing a clif/cle dump, but makes it far easier
to understand.
Most names are the same that the ones used at v3d (CL, tile_alloc,
TDSA), except those that on v3d were labelled as "resource", as right
now we don't have a resource uploader that englobes different
things. In fact, the good thing of not having that uploader is that
individual bos has a more accurate description of their purpose.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>
So we have a lower level representation of a buffer object that we can
manipulate that is not tied to a Vulkan representation of memory. This
will be useful as we start allocating driver internal buffers, such as
command lists.
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6766>
Iago Toral Quiroga
Jose Maria Casanova Crespo
Alejandro Piñeiro