在 2021/1/8 上午9:36, Like Xu 写道: > Because saving/restoring tens of LBR MSRs (e.g. 32 LBR stack entries) in > VMX transition brings too excessive overhead to frequent vmx transition > itself, the guest LBR event would help save/restore the LBR stack msrs > during the context switching with the help of native LBR event callstack > mechanism, including LBR_SELECT msr. > Sounds the feature is much helpful for VMM guest performance tunning. Good job! Thanks Alex
- Re: [RESEND v13 00/10] KVM: x86/pmu: Guest Last Branch Recording ... Alex Shi
