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The renderer's three allocation sites - textures, framebuffer
attachments and buffers - now go through vk_heap, and vk_mem_alloc.h and
its wrapper are out of the tree. The core is 182 KB smaller.
core/rend/vulkan/heap.{h,cpp} is what the renderer's classes hold: the
Allocation that gives its memory back when it goes, as before, and
VulkanHeap in place of VMAllocator. An allocation's pointer comes with
it, so MapMemory() is a load.
What each kind of memory asks for:
- textures and attachments: device-local, falling back to whatever the
image allows; a transient attachment first tries memory the device
only backs if it has to
- buffers and images the CPU fills: host-visible and coherent, on the
device where the device has such memory. VMA was asked for
host-visible only and nothing ever flushed, which was wrong on a
device whose host-visible memory is not coherent
- buffers the CPU reads back (render-to-texture readback): host-visible
and host-cached. VMA put these in device memory seen through the bus
on a discrete card, which is write-combined and slow to read
One block for images and one for the CPU's buffers are taken when the
device is set up, so a frame gets memory as an offset rather than from
the driver. A block is 64 MB, or an eighth of the device's memory where
that is less.
tools/threads/live.sh passes on the Vulkan renderer: the screenshot, the
save-state comparison with non-threaded rendering, and save, load and
reset back to back. A run under the Khronos validation layer reports
nothing. Software Vulkan only; not run on a GPU.
35 lines
1.4 KiB
C++
35 lines
1.4 KiB
C++
#define PVR_REGS_FOR_RENDERER // see hw/pvr/pvr_regs.h
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/*
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* Created on: Oct 3, 2019
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Copyright 2019 flyinghead
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This file is part of Flycast.
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Flycast is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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Flycast is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Flycast. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include "buffer.h"
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#include "utils.h"
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#include "vulkan_context.h"
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BufferData::BufferData(vk::DeviceSize size, const vk::BufferUsageFlags& usage, const vk::MemoryPropertyFlags& propertyFlags)
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: bufferSize(size), m_usage(usage), m_propertyFlags(propertyFlags)
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{
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VulkanContext *context = VulkanContext::Instance();
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buffer = context->GetDevice().createBufferUnique(vk::BufferCreateInfo(vk::BufferCreateFlags(), size, usage));
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allocation = context->GetHeap().AllocateForBuffer(*buffer,
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!(propertyFlags & vk::MemoryPropertyFlagBits::eDeviceLocal),
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(bool)(usage & vk::BufferUsageFlagBits::eTransferDst));
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}
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