HMB全称 HostMemory Buffer主机内存缓冲器,属于NVM Express (NVMe)的基本特性之一。SSD肯定需要NAND闪存颗粒,同时由Controller主控调度,为了提升 随机读写性能,有些硬盘会设计一个外置硬件的DRAM高速缓存,用来 缓冲数据和存储 映射表(Map Table),主流比例是1000:1,也就是1GB容量搭配1MB缓存, 1TB的盘搭配1GB的缓存。性...
HMB-host memory buffer Scott AI農夫在進行nn模型training時,很常會遇到batch size龐大的資料量,這時除了需要性能強大的gpu之外,硬碟的效能也是影響training效率的因素之一,因此使用ssd進行資料的存取,會是比較理想的選擇。最近發表的ssd,有一些入門或是cp值較高的款式,都會將原本是用來當成資料讀取buffer的dram取消,取...
StorPortAllocateHostMemoryBuffer分配一个或多个物理连续内存范围,用作主机内存缓冲区 (HMB) 。 语法 C++复制 ULONGStorPortAllocateHostMemoryBuffer( [in] PVOID HwDeviceExtension, [in] SIZE_T MinimumBytes, [in] SIZE_T PreferredBytes, [in] ULONGLONG UtilizationBytes, [in] ULONG AlignmentBytes...
Aspects of a storage device are provided that allow a controller to leverage cache to minimize occurrence of HMB address overlaps between different HMB requests. The storage device may include a cache and a controller coupled to the cache. The controller may store in the cache, in response to ...
StorPortFreeHostMemoryBuffer例程释放分配给主机内存缓冲区的物理连续内存 (HMB) 语法 C++ ULONGStorPortFreeHostMemoryBuffer( [in] PVOID HwDeviceExtension, PACCESS_RANGE PhysicalAddressRanges, [in] ULONG PhysicalAddressRangeCount ); 参数 [in] HwDeviceExtension ...
Group 3 NVM Feature的第4项是Host Memory Buffer Case1: Proper Structure 检查SSD是否支持HMB功能,如果不支持本case无效; Host发送Identify command给SSD(CNS=01h),获取Identify Controller data structure; 期望结果: SSD正常返回CQ; 检查Host Memory Buffer Preferred Size (HMPRE) field 大于等于 Host Memory Bu...
The NVMe version 1.2 specification introduced an in-between option for SSDs. The Host Memory Buffer (HMB) feature takes advantage of the DMA capabilities of PCI Express to allow SSDs to use some of the DRAM attached to the CPU, instead of requiring the SSD to bring its own DRAM. Accessin...
The StorPortFreeHostMemoryBuffer routine frees the physically contiguous memory that was allocated to be used for a Host Memory Buffer (HMB).
Sequential Write speed : up to 1800 MB/s HMB (Host Memory Buffer) supported TRIM & S.M.A.R.T support Energy-Efficient Reviews 0 stars based on 0 reviews Add your review Recently viewed Quick shop Gigabyte 1TB SSD PCI Express3.0x4/NVMe1.3 M.2 2280 NVMe M.2 Internal Solid Sta...
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