2023年7月确认的AMD处理器系列

截止2023年11月re-Invent 2023，新的7系列EC2已经发布，第四代EPYC处理器已经发布，因此本文介绍的内容不再是最新版本。关于7系列，请参考这篇博客。

云上EC2使用AMD处理器的哪一种机型？调查结果请参考如下。

一、AWS云上机型

创建一个使用Linux操作系统的EC2，登陆后执行lscpu命令即可查看其CPU信息。

1、较老的t3a机型

查看结果如下：

Architecture:            x86_64
  CPU op-mode(s):        32-bit, 64-bit
  Address sizes:         48 bits physical, 48 bits virtual
  Byte Order:            Little Endian
CPU(s):                  2
  On-line CPU(s) list:   0,1
Vendor ID:               AuthenticAMD
  BIOS Vendor ID:        Advanced Micro Devices, Inc.
  Model name:            AMD EPYC 7571
    BIOS Model name:     AMD EPYC 7571
    CPU family:          23
    Model:               1
    Thread(s) per core:  2
    Core(s) per socket:  1
    Socket(s):           1
    Stepping:            2
    BogoMIPS:            4398.76
    Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mm
                         xext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid tsc_known_freq pni pclmul
                         qdq ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm cmp_legacy cr8_legacy a
                         bm sse4a misalignsse 3dnowprefetch topoext vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni
                         xsaveopt xsavec xgetbv1 clzero xsaveerptr arat npt nrip_save
Virtualization features:
  Hypervisor vendor:     KVM
  Virtualization type:   full
Caches (sum of all):
  L1d:                   32 KiB (1 instance)
  L1i:                   64 KiB (1 instance)
  L2:                    512 KiB (1 instance)
  L3:                    8 MiB (1 instance)
NUMA:
  NUMA node(s):          1
  NUMA node0 CPU(s):     0,1
Vulnerabilities:
  Itlb multihit:         Not affected
  L1tf:                  Not affected
  Mds:                   Not affected
  Meltdown:              Not affected
  Mmio stale data:       Not affected
  Retbleed:              Mitigation; untrained return thunk; SMT vulnerable
  Spec store bypass:     Vulnerable
  Spectre v1:            Mitigation; usercopy/swapgs barriers and __user pointer sanitization
  Spectre v2:            Mitigation; Retpolines, STIBP disabled, RSB filling, PBRSB-eIBRS Not affected
  Srbds:                 Not affected
  Tsx async abort:       Not affected

2、较新的c6a机型

查看结果如下：

Architecture:            x86_64
  CPU op-mode(s):        32-bit, 64-bit
  Address sizes:         48 bits physical, 48 bits virtual
  Byte Order:            Little Endian
CPU(s):                  2
  On-line CPU(s) list:   0,1
Vendor ID:               AuthenticAMD
  BIOS Vendor ID:        Advanced Micro Devices, Inc.
  Model name:            AMD EPYC 7R13 Processor
    BIOS Model name:     AMD EPYC 7R13 Processor
    CPU family:          25
    Model:               1
    Thread(s) per core:  2
    Core(s) per socket:  1
    Socket(s):           1
    Stepping:            1
    BogoMIPS:            5299.99
    Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mm
                         xext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf tsc_known_freq
                          pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm
                         cmp_legacy cr8_legacy abm sse4a misalignsse 3dnowprefetch topoext invpcid_single ssbd ibrs ibpb stibp vmmcall fsgs
                         base bmi1 avx2 smep bmi2 invpcid rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 clzero xsaveerptr
                         rdpru wbnoinvd arat npt nrip_save vaes vpclmulqdq rdpid
Virtualization features:
  Hypervisor vendor:     KVM
  Virtualization type:   full
Caches (sum of all):
  L1d:                   32 KiB (1 instance)
  L1i:                   32 KiB (1 instance)
  L2:                    512 KiB (1 instance)
  L3:                    4 MiB (1 instance)
NUMA:
  NUMA node(s):          1
  NUMA node0 CPU(s):     0,1
Vulnerabilities:
  Itlb multihit:         Not affected
  L1tf:                  Not affected
  Mds:                   Not affected
  Meltdown:              Not affected
  Mmio stale data:       Not affected
  Retbleed:              Not affected
  Spec store bypass:     Mitigation; Speculative Store Bypass disabled via prctl
  Spectre v1:            Mitigation; usercopy/swapgs barriers and __user pointer sanitization
  Spectre v2:            Mitigation; Retpolines, IBPB conditional, IBRS_FW, STIBP conditional, RSB filling, PBRSB-eIBRS Not affected
  Srbds:                 Not affected
  Tsx async abort:       Not affected

3、较新的m6a机型

查看结果如下：

Architecture:            x86_64
  CPU op-mode(s):        32-bit, 64-bit
  Address sizes:         48 bits physical, 48 bits virtual
  Byte Order:            Little Endian
CPU(s):                  2
  On-line CPU(s) list:   0,1
Vendor ID:               AuthenticAMD
  BIOS Vendor ID:        Advanced Micro Devices, Inc.
  Model name:            AMD EPYC 7R13 Processor
    BIOS Model name:     AMD EPYC 7R13 Processor
    CPU family:          25
    Model:               1
    Thread(s) per core:  2
    Core(s) per socket:  1
    Socket(s):           1
    Stepping:            1
    BogoMIPS:            5299.97
    Flags:               fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mm
                         xext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf tsc_known_freq
                          pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt aes xsave avx f16c rdrand hypervisor lahf_lm
                         cmp_legacy cr8_legacy abm sse4a misalignsse 3dnowprefetch topoext invpcid_single ssbd ibrs ibpb stibp vmmcall fsgs
                         base bmi1 avx2 smep bmi2 invpcid rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 clzero xsaveerptr
                         rdpru wbnoinvd arat npt nrip_save vaes vpclmulqdq rdpid
Virtualization features:
  Hypervisor vendor:     KVM
  Virtualization type:   full
Caches (sum of all):
  L1d:                   32 KiB (1 instance)
  L1i:                   32 KiB (1 instance)
  L2:                    512 KiB (1 instance)
  L3:                    4 MiB (1 instance)
NUMA:
  NUMA node(s):          1
  NUMA node0 CPU(s):     0,1
Vulnerabilities:
  Itlb multihit:         Not affected
  L1tf:                  Not affected
  Mds:                   Not affected
  Meltdown:              Not affected
  Mmio stale data:       Not affected
  Retbleed:              Not affected
  Spec store bypass:     Mitigation; Speculative Store Bypass disabled via prctl
  Spectre v1:            Mitigation; usercopy/swapgs barriers and __user pointer sanitization
  Spectre v2:            Mitigation; Retpolines, IBPB conditional, IBRS_FW, STIBP conditional, RSB filling, PBRSB-eIBRS Not affected
  Srbds:                 Not affected
  Tsx async abort:       Not affected

4、截止2023年7月尚在Preview的c7a机型

暂无信息。

以上信息来自使用者的配置，现在查看官方信息。

二、官方信息（来自AMD官网）

通用型 m6a/m5a 机型（vCPU和内存比1:4）的处理器信息：

计算优化型 c6a/c5a 机型（vCPU和内存比1:2）的处理器信息：

内存优化型 r6a/r5a （vCPU和内存比1:8）机型的处理器信息：

爆发型 t3a （vCPU和内存1:0.5/1:1/1:2/1:4）机型的处理器信息：

GPU-3D图形场景型 g4.ad（vCPU和内存比1:4）的处理器信息：

三、结论

用于生产系统的c6a、m6a、r6a系列的EC2都是第三代EPYC处理器（代号Milan）的处理器。用于开发测试系统的爆发型t3a系列的处理器是第一代EPYC处理器，性能不高，主打性价比。

使用第四代EYPC处理器（代号Genoa）的c7a等机型截止2023年7月尚未大规模可用，不久的将来也会商用推向市场。

四、参考文档

AWS官网对AMD处理器的介绍：

https://aws.amazon.com/cn/ec2/amd/

AMD官网介绍AWS云服务机型：

https://www.amd.com/en/processors/amd-epyc-aws

AWS官网型发布m7a型介绍：

https://aws.amazon.com/cn/ec2/instance-types/m7a/