NCNN的内存显存分配器ncnn::Allocator & ncnn::VkAllocator翻译及其差异对比的学习笔记（nihui亲审过滴）

标签：显存 BUFFER VK ncnn 分配器 MEMORY BIT PROPERTY

NCNN的内存分配器

ncnn::Allocator 通用内存分配器   ncnn::PoolAllocator 内存池分配器 可以设置池大小，减少分配内存和析构内存次数，空间换时间   ncnn::UnlockedPoolAllocator 无锁内存池分配器 同上，只是需在外部保证不会同时访问内存资源  

NCNN的显存分配器

ncnn::VkAllocator 通用显存分配器（基类）   ncnn::VkBlobAllocator 特征显存分配器 vkCreateBuffer(): VK_BUFFER_USAGE_STORAGE_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_SRC_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT 集成显卡:     required: VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT     preferred: VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT     preferred_not: 0 独立显卡:     required: VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT     preferred: 0     preferred_not: VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT
ncnn::VkWeightAllocator 权重显存分配器 vkCreateBuffer(): VK_BUFFER_USAGE_STORAGE_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT vkAllocateMemory(): 集成显卡:     required: VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT     preferred: VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT     preferred_not: 0 独立显卡:     required: VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT     preferred: 0     preferred_not: VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT
ncnn::VkStagingAllocator 临时缓冲区显存分配器 vkCreateBuffer(): VK_BUFFER_USAGE_STORAGE_BUFFER_BIT | VK_BUFFER_USAGE_TRANSFER_SRC_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT vkAllocateMemory():     required: VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT     preferred: VK_MEMORY_PROPERTY_HOST_CACHED_BIT     preferred_not: VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT
ncnn::VkWeightStagingAllocator 权重+临时缓冲区显存分配器 vkCreateBuffer(): VK_BUFFER_USAGE_TRANSFER_SRC_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT vkAllocateMemory():     required: VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT     preferred: VK_MEMORY_PROPERTY_HOST_CACHED_BIT     preferred_not: VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT
ncnn::VkAndroidHardwareBufferImageAllocator 专门为Android优化显存分配器

标签：显存,BUFFER,VK,ncnn,分配器,MEMORY,BIT,PROPERTY
From： https://www.cnblogs.com/hyb1/p/17216342.html