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Arm CPU の Azure Cobalt 100 仮想マシンを作成してみた

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Azure
Azure CLI
azurecobalt100
tech

Arm CPU の Azure Cobalt 100 が GA したので、試しに Azure CLI で仮想マシンを作成してみました。x86 CPU よりも安く性能が高いようなので、そのうち何かの案件で使う日がくるかもしれません。

検証用仮想マシンを作成

zsh
prefix=mnrc100
region=japaneast

az group create \
  --name ${prefix}-rg \
  --location $region

az vm create \
  --resource-group ${prefix}-rg \
  --name ${prefix}-vm \
  --os-disk-name ${prefix}-vmOSDisk \
  --image canonical:ubuntu-24_04-lts:server-arm64:latest \
  --size Standard_D2pls_v6 \
  --admin-username azureuser \
  --generate-ssh-keys \
  --nsg-rule NONE \
  --public-ip-address-dns-name ${prefix}

NSG に SSH を追加

zsh
az network nsg rule create \
  --resource-group ${prefix}-rg \
  --name AllowSSH \
  --nsg-name ${prefix}-vmNSG \
  --priority 100 \
  --source-address-prefixes $(curl -s inet-ip.info) \
  --destination-port-ranges 22 \
  --access Allow \
  --protocol Tcp

検証用仮想マシンに SSH 接続

zsh
ssh azureuser@${prefix}.$region.cloudapp.azure.com

CPU 情報を確認

bash
$ lscpu
Architecture:             aarch64
  CPU op-mode(s):         32-bit, 64-bit
  Byte Order:             Little Endian
CPU(s):                   2
  On-line CPU(s) list:    0,1
Vendor ID:                ARM
  Model name:             Neoverse-N2
    Model:                0
    Thread(s) per core:   1
    Core(s) per socket:   2
    Socket(s):            1
    Stepping:             r0p0
    BogoMIPS:             2000.00
    Flags:                fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp asimdhp cpuid asimdrdm j
                          scvt fcma lrcpc dcpop sha3 sm3 sm4 asimddp sha512 sve asimdfhm uscat ilrcpc flag
                          m ssbs sb paca pacg dcpodp sve2 sveaes svebitperm svesha3 svesm4 flagm2 frint sv
                          ei8mm svebf16 i8mm bf16
Caches (sum of all):      
  L1d:                    128 KiB (2 instances)
  L1i:                    128 KiB (2 instances)
  L2:                     2 MiB (2 instances)
  L3:                     128 MiB (1 instance)
NUMA:                     
  NUMA node(s):           1
  NUMA node0 CPU(s):      0,1
Vulnerabilities:          
  Gather data sampling:   Not affected
  Itlb multihit:          Not affected
  L1tf:                   Not affected
  Mds:                    Not affected
  Meltdown:               Not affected
  Mmio stale data:        Not affected
  Reg file data sampling: Not affected
  Retbleed:               Not affected
  Spec rstack overflow:   Not affected
  Spec store bypass:      Mitigation; Speculative Store Bypass disabled via prctl
  Spectre v1:             Mitigation; __user pointer sanitization
  Spectre v2:             Mitigation; CSV2, BHB
  Srbds:                  Not affected
  Tsx async abort:        Not affected

後片付け

zsh
az group delete \
  --name ${prefix}-rg \
  --yes

参考

https://azure.microsoft.com/en-us/blog/azure-cobalt-100-based-virtual-machines-are-now-generally-available/

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