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https://github.com/encounter/dawn-cmake.git
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21dfc91954
Uses a large buddy system to allocate binary sized heaps on-demand. BUG=dawn:27 Change-Id: I72e425c23e601da6ee53827423bef7ff13be049c Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/10880 Reviewed-by: Austin Eng <enga@chromium.org> Reviewed-by: Corentin Wallez <cwallez@chromium.org> Commit-Queue: Bryan Bernhart <bryan.bernhart@intel.com>
120 lines
4.8 KiB
C++
120 lines
4.8 KiB
C++
// Copyright 2019 The Dawn Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "dawn_native/vulkan/DeviceVk.h"
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#include "dawn_native/vulkan/FencedDeleter.h"
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#include "dawn_native/vulkan/ResourceMemoryVk.h"
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#include "dawn_native/vulkan/VulkanError.h"
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namespace dawn_native { namespace vulkan {
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MemoryResourceAllocator::MemoryResourceAllocator(Device* device) : mDevice(device) {
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}
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int MemoryResourceAllocator::FindBestTypeIndex(VkMemoryRequirements requirements,
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bool mappable) {
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const VulkanDeviceInfo& info = mDevice->GetDeviceInfo();
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// Find a suitable memory type for this allocation
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int bestType = -1;
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for (size_t i = 0; i < info.memoryTypes.size(); ++i) {
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// Resource must support this memory type
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if ((requirements.memoryTypeBits & (1 << i)) == 0) {
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continue;
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}
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// Mappable resource must be host visible
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if (mappable &&
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(info.memoryTypes[i].propertyFlags & VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT) == 0) {
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continue;
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}
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// Mappable must also be host coherent.
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if (mappable &&
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(info.memoryTypes[i].propertyFlags & VK_MEMORY_PROPERTY_HOST_COHERENT_BIT) == 0) {
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continue;
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}
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// Found the first candidate memory type
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if (bestType == -1) {
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bestType = static_cast<int>(i);
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continue;
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}
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// For non-mappable resources, favor device local memory.
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if (!mappable) {
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if ((info.memoryTypes[bestType].propertyFlags &
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VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT) == 0 &&
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(info.memoryTypes[i].propertyFlags & VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT) !=
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0) {
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bestType = static_cast<int>(i);
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continue;
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}
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}
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// All things equal favor the memory in the biggest heap
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VkDeviceSize bestTypeHeapSize =
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info.memoryHeaps[info.memoryTypes[bestType].heapIndex].size;
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VkDeviceSize candidateHeapSize = info.memoryHeaps[info.memoryTypes[i].heapIndex].size;
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if (candidateHeapSize > bestTypeHeapSize) {
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bestType = static_cast<int>(i);
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continue;
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}
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}
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return bestType;
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}
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ResultOrError<ResourceMemoryAllocation> MemoryResourceAllocator::Allocate(
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VkMemoryRequirements requirements,
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bool mappable) {
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int bestType = FindBestTypeIndex(requirements, mappable);
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// TODO(cwallez@chromium.org): I think the Vulkan spec guarantees this should never
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// happen
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if (bestType == -1) {
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return DAWN_DEVICE_LOST_ERROR("Unable to find memory for requirements.");
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}
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VkMemoryAllocateInfo allocateInfo;
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allocateInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
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allocateInfo.pNext = nullptr;
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allocateInfo.allocationSize = requirements.size;
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allocateInfo.memoryTypeIndex = static_cast<uint32_t>(bestType);
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VkDeviceMemory allocatedMemory = VK_NULL_HANDLE;
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DAWN_TRY(CheckVkSuccess(mDevice->fn.AllocateMemory(mDevice->GetVkDevice(), &allocateInfo,
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nullptr, &allocatedMemory),
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"vkAllocateMemory"));
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void* mappedPointer = nullptr;
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if (mappable) {
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DAWN_TRY(CheckVkSuccess(mDevice->fn.MapMemory(mDevice->GetVkDevice(), allocatedMemory,
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0, requirements.size, 0, &mappedPointer),
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"vkMapMemory"));
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}
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AllocationInfo info;
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info.mMethod = AllocationMethod::kDirect;
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return ResourceMemoryAllocation(info, /*offset*/ 0, new ResourceMemory(allocatedMemory),
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static_cast<uint8_t*>(mappedPointer));
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}
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void MemoryResourceAllocator::Deallocate(ResourceMemoryAllocation& allocation) {
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mDevice->GetFencedDeleter()->DeleteWhenUnused(
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ToBackend(allocation.GetResourceHeap())->GetMemory());
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}
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}} // namespace dawn_native::vulkan
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