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iris: Align fresh BO allocations to 2MB in size

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This should allow us to use 64K pages in more cases, and since the
suballocator is typically used for BOs smaller than 2MB, it probably
isn't going to waste a horrendous amount of memory.

Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/25447>
This commit is contained in:
Kenneth Graunke 2023-09-27 18:53:58 -07:00 • committed by Marge Bot
parent 6932827a47
commit 0b6693a3a1
1 changed files with 9 additions and 0 deletions
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9
src/gallium/drivers/iris/iris_bufmgr.c
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@ -1067,6 +1067,15 @@ alloc_fresh_bo(struct iris_bufmgr *bufmgr, uint64_t bo_size, unsigned flags)
if (!bo)
return NULL;
/* Try to allocate memory in multiples of 2MB, as this allows us to use
* 64K pages rather than the less-efficient 4K pages. Most BOs smaller
* than 64MB should hit the BO cache or slab allocations anyway, so this
* shouldn't waste too much memory. We do exclude small (< 1MB) sizes to
* be defensive in case any of those bypass the caches and end up here.
*/
if (bo_size >= 1024 * 1024)
bo_size = ALIGN(bo_size, 2 * 1024 * 1024);
bo->real.heap = flags_to_heap(bufmgr, flags);
const struct intel_memory_class_instance *regions[2];