テーマ： cpu

• Diagnosing CPU steal time on virtualized Linux hosts with mpstat and vmstat

  High %steal in mpstat or a rising st column in vmstat means the hypervisor withheld CPU the guest wanted, not that the application misbehaved. This methodology reads both fields correctly and tells contention from real CPU exhaustion.

  methodology · en · reviewed · 知識の基準日 2026-09-24

• Checking hardware virtualization support and nested KVM before relying on it

  Before installing a hypervisor or nesting a VM inside a VM, confirm the CPU exposes virtualization extensions and, for nesting, that the kvm_intel or kvm_amd module has the nested option enabled. virt-host-validate and /proc/cpuinfo give a quick answer.

  methodology · en · reviewed · 知識の基準日 2026-09-24

機械可読： JSON