71e486d1cf
Detroit: Become Human has an optimization issue where the same BO is mapped and unmapped on a per-frame basis, which leads to massive overhead in the kernel, both creating the mapping and taking page faults. Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26942>
37 lines
1.7 KiB
C
37 lines
1.7 KiB
C
/*
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* Copyright © 2024 Valve Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "radv_private.h"
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VKAPI_ATTR VkResult VKAPI_CALL
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quantic_dream_UnmapMemory2KHR(VkDevice _device, const VkMemoryUnmapInfoKHR *pMemoryUnmapInfo)
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{
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/* Detroit: Become Human repeatedly calls vkMapMemory and vkUnmapMemory on the same buffer.
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* This creates high overhead in the kernel due to mapping operation and page fault costs.
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*
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* Simply skip the unmap call to workaround it. Mapping an already-mapped region is UB in Vulkan,
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* but will correctly return the mapped pointer on RADV.
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*/
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return VK_SUCCESS;
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}
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