sometimes a driver might want to always reclaim all bo objects in the course
of allocating a new bo. this is useful when it's known that a given memory
heap is very small and will likely need to keep its usage minimized
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13850>
originally, a slab attempts to reclaim a single bo. there are two outcomes
to this which can occur:
* the bo is reclaimed
* the bo is not reclaimed
if the bo is reclaimed, great.
if the bo is not reclaimed, it remains at the head of the list until it can
be reclaimed. this means that any bo with a "long" work queue which makes it
into a slab will effectively kill the entire slab. in a benchmarking scenario,
this can occur in rapid succession, and every slab will get 1-2 suballocations
before it reaches a bo that blocks long enough for a new slab to be needed.
the inevitable result of this scenario is that all memory is depleted almost instantly,
all because pb assumes that if the first bo in the reclaim list isn't ready, none of them
can be ready
for drivers like radeonsi, this happens to be a fine assumption
for drivers like zink, this is entirely not workable and explodes the gpu
Cc: mesa-stable
Reviewed-by: Witold Baryluk <witold.baryluk@gmail.com>
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Tested-by: Witold Baryluk <witold.baryluk@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13345>
Instead of aligning slab allocations to powers of two (e.g. 129K -> 256K),
implement slab allocations with 3/4 of power of two sizes to reduce
overallocation. (e.g. 129K -> 192K)
The limitation is that the alignment must be 1/3rd of the allocation size.
DeusExMD allocates 2.1 GB of VRAM. Without this, slabs waste 194 MB due
to alignment, i.e. 9.2%. This commit reduces the waste to 102 MB, i.e. 4.9%.
Reviewed-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8683>
pipe_mutex_unlock() was made unnecessary with fd33a6bcd7.
Replaced using:
find ./src -type f -exec sed -i -- \
's:pipe_mutex_unlock(\([^)]*\)):mtx_unlock(\&\1):g' {} \;
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
replace pipe_mutex_lock() was made unnecessary with fd33a6bcd7.
Replaced using:
find ./src -type f -exec sed -i -- \
's:pipe_mutex_lock(\([^)]*\)):mtx_lock(\&\1):g' {} \;
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
pipe_mutex_destroy() was made unnecessary with fd33a6bcd7.
Replace was done with:
find ./src -type f -exec sed -i -- \
's:pipe_mutex_destroy(\([^)]*\)):mtx_destroy(\&\1):g' {} \;
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
pipe_mutex_init() was made unnecessary with fd33a6bcd7.
Replace was done using:
find ./src -type f -exec sed -i -- \
's:pipe_mutex_init(\([^)]*\)):(void) mtx_init(\&\1, mtx_plain):g' {} \;
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This is a simple framework for slab allocation from buffers that fits into
the buffer management scheme of the radeon and amdgpu winsyses where bufmgrs
aren't used.
The utility knows about different sized allocations and explicitly manages
reclaim of allocations that have pending fences. It manages all the free lists
but does not actually touch buffer objects directly, relying on callbacks for
that.
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Eric Engestrom
Mike Blumenkrantz
Marek Olšák
Marcin Ślusarz
Timothy Arceri
Nicolai Hähnle