Re: [PATCH v4 4/5] KVM: LAPIC: Delay trace advance expire delta

From: Wanpeng Li
Date: Mon May 20 2019 - 07:39:14 EST


On Mon, 20 May 2019 at 19:33, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
>
> On 20/05/19 13:22, Wanpeng Li wrote:
> >>
> >> We would like to move wait_lapic_expire() just before vmentry, which would
> >> place wait_lapic_expire() again inside the extended quiescent state. Drop
> >> the tracepoint, but add instead another one that can be useful and where
> >> we can check the status of the adaptive tuning procedure.
> > https://lkml.org/lkml/2019/5/15/1435
> >
> > Maybe Sean's comment is reasonable, per-vCPU debugfs entry for
> > adaptive tuning and wait_lapic_expire() tracepoint for hand tuning.
>
> Hmm, yeah, that makes sense. The location of the tracepoint is a bit
> weird, but I guess we can add a comment in the code.

Do you need me to post a new patchset? :)

Regards,
Wanpeng Li