d77fb1fb0e
Update descriptor pool sizes to be better for smaller scenes. Creating, resetting and destroying pools are expensive operations. In smaller scenes this can lead to lower performance. The improvements may differ per platforms or not be visible. Pull Request: https://projects.blender.org/blender/blender/pulls/138300
70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup gpu
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*/
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#pragma once
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#include "BLI_vector.hh"
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#include "vk_descriptor_set.hh"
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namespace blender::gpu {
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class VKDevice;
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/**
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* List of VkDescriptorPools.
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*
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* In Vulkan a pool is constructed with a fixed size per resource type. When more resources are
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* needed it a next pool should be created. VKDescriptorPools will keep track of those pools and
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* construct new pools when the previous one is exhausted.
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*
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* At the beginning of a new frame the descriptor pools are reset. This will start allocating
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* again from the first descriptor pool in order to use freed space from previous pools.
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*/
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class VKDescriptorPools {
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/**
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* Pool sizes to use. When one descriptor pool is requested to allocate a descriptor but isn't
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* able to do so, it will fail.
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*
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* See VKDescriptorSetTracker::upload_descriptor_sets for rebalancing the pool sizes.
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*/
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static constexpr uint32_t POOL_SIZE_STORAGE_BUFFER = 1000;
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static constexpr uint32_t POOL_SIZE_DESCRIPTOR_SETS = 250;
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static constexpr uint32_t POOL_SIZE_STORAGE_IMAGE = 250;
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static constexpr uint32_t POOL_SIZE_COMBINED_IMAGE_SAMPLER = 250;
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static constexpr uint32_t POOL_SIZE_UNIFORM_BUFFER = 500;
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static constexpr uint32_t POOL_SIZE_UNIFORM_TEXEL_BUFFER = 100;
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static constexpr uint32_t POOL_SIZE_INPUT_ATTACHMENT = 100;
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Vector<VkDescriptorPool> pools_;
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int64_t active_pool_index_ = 0;
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public:
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VKDescriptorPools();
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~VKDescriptorPools();
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void init(const VKDevice &vk_device);
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VkDescriptorSet allocate(const VkDescriptorSetLayout descriptor_set_layout);
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/**
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* Discard all existing pools and re-initializes this instance.
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*
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* This is a fix to ensure that resources will not be rewritten. Eventually we should discard the
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* resource pools for reuse.
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*/
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void discard(VKContext &vk_context);
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private:
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VkDescriptorPool active_pool_get();
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void activate_next_pool();
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void activate_last_pool();
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bool is_last_pool_active();
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void add_new_pool(const VKDevice &device);
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};
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} // namespace blender::gpu
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