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vulkan: Add a cache allocation to buddy allocator

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Instead of immediately freeing memory, keep one chunk around, because
surely somebody is gonna do another allocation soon.
This commit is contained in:
Benjamin Otte
2023-07-23 18:31:54 +02:00
parent baf62c8923
commit 965b8c26bb
1 changed files with 20 additions and 5 deletions
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25
gsk/vulkan/gskvulkanmemory.c
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@@ -171,6 +171,7 @@ struct _GskVulkanBuddyAllocator
gsize block_size_slot;
GskVulkanAllocation cache;
GskVulkanAllocationList free_lists[N_SUBDIVISIONS];
};
@@ -180,6 +181,9 @@ gsk_vulkan_buddy_allocator_free_allocator (GskVulkanAllocator *allocator)
GskVulkanBuddyAllocator *self = (GskVulkanBuddyAllocator *) allocator;
gsize i;
if (self->cache.vk_memory)
gsk_vulkan_free (self->allocator, &self->cache);
for (i = 0; i < N_SUBDIVISIONS; i++)
{
gsk_vulkan_allocation_list_clear (&self->free_lists[i]);
@@ -226,10 +230,18 @@ gsk_vulkan_buddy_allocator_alloc (GskVulkanAllocator *allocator,
}
if (i < 0)
{
/* We force alignment to our size, so that we can use offset
* to find the buddy allocation.
*/
gsk_vulkan_alloc (self->allocator, 1 << self->block_size_slot, 1 << self->block_size_slot, alloc);
if (self->cache.vk_memory)
{
*alloc = self->cache;
self->cache.vk_memory = NULL;
}
else
{
/* We force alignment to our size, so that we can use offset
* to find the buddy allocation.
*/
gsk_vulkan_alloc (self->allocator, 1 << self->block_size_slot, 1 << self->block_size_slot, alloc);
}
}
else
{
@@ -283,7 +295,10 @@ restart:
alloc->size <<= 1;
if (slot == 0)
{
gsk_vulkan_free (self->allocator, alloc);
if (self->cache.vk_memory == NULL)
self->cache = *alloc;
else
gsk_vulkan_free (self->allocator, alloc);
return;
}
else