Warum erhöht sich die Fragmentierung von Vulkan GPU -Gerätespeicher im Vergleich zum lokalen Speicher des Hosts dramatis ⇐ C++

[Anonymous]

(GPU) Gerätespeicher
Verwenden Sie Vulkan -Grafik -API -Zuordnung von Gerätespeicher:
Dies ist mein Teil Vulkan -Testcode:
VertexBuffer vertex_buffer;

VkMemoryAllocateInfo memAlloc{};
memAlloc.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
VkMemoryRequirements memReqs;

VkBufferCreateInfo vertexBufferInfoCI{};
vertexBufferInfoCI.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
vertexBufferInfoCI.size = block_size * number;
// Create a device local buffer to which the (host local) vertex data will be copied and which will be used for rendering
vertexBufferInfoCI.usage = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT;
(vkCreateBuffer(device, &vertexBufferInfoCI, nullptr, &vertex_buffer.buffer));
vkGetBufferMemoryRequirements(device, vertex_buffer.buffer, &memReqs);
memAlloc.allocationSize = memReqs.size;
memAlloc.memoryTypeIndex = getMemoryTypeIndex(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
(vkAllocateMemory(device, &memAlloc, nullptr, &vertex_buffer.memory));
(vkBindBufferMemory(device, vertex_buffer.buffer, vertex_buffer.memory, 0));

vertex_buffers.push_back(vertex_buffer);
< /code>

• Einmal zugeteilt (100000000 * 1) Bytgrößengedächtnis. GPU -Speicher!if(once_allocate)
  {
  auto once_blocks = new char[block_size * buffer_number];
  
  for (uint64_t index = 0; index < buffer_number; index++)
  {
  once_blocks[index] = 'i';
  }
  }
  else
  {
  for (uint64_t index = 0; index < buffer_number; index++)
  {
  auto ps = new char[block_size];
  
  for (int i = 0; i < block_size; i++)
  {
  ps = 'i';
  }
  }
  }
  < /code>
  
  Einmal zugeteilt (100000000 * 1) Bytgrößengedächtnis. Speicher.