AWS re_invent 2019和2020 中的Graviton

Graviton 1

是AWS的第一个ARM的处理器；

工艺是16nm；

有50亿个晶体管；

Graviton 2

整体架构如下

Graviton 2 是7nm的；

有300亿个晶体管；

是基于64位的ARM Core的；准确说就是ARM Neoverse N1 Core；

64个core 是2-D Mesh互联的；

没有超线程；

4-wide的前端，和8-wide的dispatch；

支持int8和fp16指令集；

支持X64 PCIe Gen4；

支持8 CH的DDR4 3200 MHz；但是没有NUMA的概念；那么内存的时延也就是统一的；

单个处理器的最大的内存带宽是：8ch * 3200MHz * 64 bit /8 /1000 = 204.8GB/s；

相对第一代产品单核心的平均性能的提升：SPEC int 2017 Rate 提升40%+，SPEC fp 2017 Rate 提升20%+；

Graviton 3

550亿晶体管；

https://www.cnblogs.com/kongchung/p/15674209.html

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参考文献：

• 有个地址保存了历年的re_invent的资料：http://aws-reinvent-audio.s3-website.us-east-2.amazonaws.com/
• aws re_invent 2019的介绍胶片：https://d1.awsstatic.com/events/reinvent/2019/REPEAT_1_Deep_dive_on_Arm-based_EC2_instances_powered_by_AWS_Graviton_CMP322-R1.pdf
• aws re_invent 2020的介绍胶片：https://d1.awsstatic.com/events/reinvent/2020/The_journey_to_silicon_innovation_at_AWS_CMP313.pdf