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NVMe - NB的特性

翻译一下,纯粹是为了记住这些特性:

 

NVMe provides the following benefits:
● Ultra-low latency 非常低的延迟
● Very high throughput 非常高的吞吐量
● Low power architecture, delivering lower power consumption and resulting in a lower Total Cost of Ownership and reduced carbon footprint 低功耗设计,提供更低的TCO以及碳消耗(扯得有点远,不过有道理,谁让节能减排是主流呢)
● Reduced gate count 减少了门数(什么意思?难道是数据流层数减少了?)
● Cost reduction and shorter time to market through use of a standardized interface 降低成本,且更快地切入市场
● Reliable performance across multiple cores enabling quick access to critical data 性能可靠,支持多核模式,保证更快地获取关键信息
● An optimized register interface and command set that reduces CPU utilization resulting in higher performance and lower power 优化了寄存器接口和指令集设计,降低了CPU处理的复杂度,显著提高性能,降低功耗
● Scalability with headroom for current and future NVM performance 为现在和将来提供了可拓展空间(狡兔三窟)
● End-to-end data protection capabilities and support for standard security protocols, such as Trusted Computing Group 端到端数据保护,支持标准安全协议,如TCG (背靠大树)
● Seamless integration into multiple operating system environments with standard open driver interfaces 使用标准开源的驱动接口,可以无缝整合到多操作系统的环境中

 

NVMe - Architected for Performance 为性能而生
? No practical limit on number of outstanding requests 对请求数量基本没有限制
? Up to 64K I/O queues each with up to 64K entries 高达64K个Queue,每个Queue高达64K个Command
? 32-bit controller unique command identifier (16-bit Queue ID + 16 Command ID) allows up to 232 outstanding commands ?
? Supports many-core processors without locking 支持多核,无锁设计
? Each processor may be configured with its own submission/completion queues and MSI-X interrupt 每个核可以被单独配置,拥有自己的submission和completion queues以及MSI-X中断
? At most one doorbell write to issue a command 一个Doorbell就可以触发命令执行
? Multiple commands may be issued with a single doorbell write 多个命令使用一个Doorbell就可以触发执行
? Streamlined NVM command set avoids burdening controller with legacy command support requirements 流水线式的设计,降低控制器的压力
? Fixed size 64B commands and 16B completions enable fast and efficient command decode and execution 命令的大小固定,解码执行更快更高效
? Commands contain 2 PRPs allowing 4KB or 8KB reads and writes be processed without fetching any additional information (e.g., scatter/gather list) 命令包含了2个PRP,支持4KB和8KB的连续顺畅读写
? PRP based scatter/gather list allow efficient out-of-order data delivery  PRP支持高效的乱序数据传输

 

 

NVMe Standardized Features
? Logical block data and metadata 逻辑块数据和元数据
? End-to-end data protection (T10 DIF and DIX compatible) 端到端保护
? Security (Trusted Computing Group collaboration) 安全
? Submission queue arbitration and QoS 服务质量保证
? Firmware update and activation 固件更新、激活
? Dynamic power management 动态电源管理
? Robust error reporting 高大威猛的报错机制
? Interrupt coalescing configuration/control 中断联合配置、控制
? Capability discovery and configuration 容量检测和配置

 

正所谓

早生晚生不重要,出身高贵乃正道

倘若不服你来辨,性能好到你出汗

 

NVMe - NB的特性