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Apple A11 Bionic

Apple A11 “仿生”
产品化2017年9月12日
设计团队苹果公司
生产商
微架构兼容ARMv8-A
指令集架构A64
制作工艺/制程10 nm[1]
核心数量六核心[1][2]
一级缓存64 KB 指令, 64 KB 资料[3]
二级缓存8 MB
CPU主频范围至 2.39GHz 
应用平台移动设备
上代产品Apple A10 Fusion
继任产品Apple A12 Bionic

Apple A11 “仿生”(Bionic)是一款由苹果公司设计的,于2017年9月12日发表的64位系统单片机(SoC),并被首先搭载于iPhone 8iPhone 8 PlusiPhone X三款智能电话中。[4]

设计

A11的CPU部分为六核心设计,由2颗代号为“季风”(Monsoon)的高性能核心及4颗代号为“西北风”(Mistral)的节能核心以big.LITTLE配置组成,具备容量达 8 MB 的二级缓存,但取消了三级缓存。[5][1][4][2]A11与前代晶片最大的不同是使用第二代性能控制器,采用HMP全局任务调度形式能使6颗CPU核心得以同时运行[6]。苹果公司一如既往不公开A11的CPU时脉资讯,不过根据某些性能测试工具(如GeekBench)的大略量度,高性能CPU核心的最高时脉大约为 2.5 GHz,节电CPU核心的最高时脉大约为 1.5 GHz。[7]

作为一款系统单片机,A11除了集成了由苹果公司所设计之3核心图形处理器(GPU)以外,也开始内建支持光照环境侦测和先进像素处理的图像处理单元(ISP)[4],另A11亦包含了每秒能够演算出6000亿笔指令,被苹果公司命名为Neural Engine的神经网络专用加速电路模块,以运用于Face IDAnimoji及其他机器学习任务上[6]。不过集成深度学习引擎的SoC,此前高通骁龙820是第一个尝试[8],而华为技术早前推出的麒麟970也宣称内建了自家开发的深度学习引擎。至于集成ISP,也是移动设备SoC业界的常见设计。[9]

A11由台积电代工生产[1],内含43亿个晶体管[10]

苹果公司称相较于前代的Apple A10 Fusion,CPU部分高性能核心和节电核心的性能分别提升25%及70%,GPU性能较前代提升30%。[4][10]

产品使用

参见

参考文献

  1. ^ 1.0 1.1 1.2 1.3 1.4 Cutress, Ian. Apple 2017: The iPhone X (Ten) Announced. AnandTech. 2017-09-12 [2017-09-12]. (原始内容存档于2017-09-13). 
  2. ^ 2.0 2.1 Clover, Julie. iOS 11 GM Leak Reveals Details on Face ID, Apple Pay, Wireless Charging, and A11 Chip in iPhone X. MacRumors. 2017-09-10 [2017-09-13]. (原始内容存档于2017-09-13). 
  3. ^ Measured and Estimated Cache Sizes. AnandTech. October 5, 2018 [2022-05-19]. (原始内容存档于2018-10-06). 
  4. ^ 4.0 4.1 4.2 4.3 iPhone 8 and iPhone 8 Plus: A new generation of iPhone (新闻稿). Apple. 2017-09-12 [2017-09-12]. (原始内容存档于2017-09-12). 
  5. ^ 存档副本. [2017-09-15]. (原始内容存档于2018-01-29). 
  6. ^ 6.0 6.1 The future is here: iPhone X (新闻稿). Apple. 2017-09-12 [2017-09-12]. (原始内容存档于2018-04-01). 
  7. ^ iPhone 8/X A11 處理器跑分搶先曝光. [2017-09-16]. (原始内容存档于2017-09-17). 
  8. ^ Hardware, HKEPC. 率先賦與 S820 深度運算學習能力 Qualcomm 神經網絡運算引擎SDK. HKEPC Hardware. [2017-10-21]. (原始内容存档于2017-10-21) (中文(台湾)). 
  9. ^ 蘋果 A11 Bionic 處理器的弦外之音... - 癮科技. 瘾科技. 2017-09-13 [2017-09-16]. (原始内容存档于2017-09-16) (中文(繁体)). 
  10. ^ 10.0 10.1 iPhone 8: A11 Bionic. Apple. 2017-09-12 [2017-09-12]. (原始内容存档于2017-11-01). 
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Apple A11 Bionic
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