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From: Wanpeng Li <kernellwp@gmail.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: LKML <linux-kernel@vger.kernel.org>, kvm <kvm@vger.kernel.org>,
	"Radim Krčmář" <rkrcmar@redhat.com>,
	"Sean Christopherson" <sean.j.christopherson@intel.com>,
	"Liran Alon" <liran.alon@oracle.com>
Subject: Re: [PATCH v4 4/5] KVM: LAPIC: Delay trace advance expire delta
Date: Mon, 20 May 2019 19:36:40 +0800	[thread overview]
Message-ID: <CANRm+CzFQy4UC9oGxFK8UVVhdtV_LGeF3JcNohpRcgspSqcxwg@mail.gmail.com> (raw)
In-Reply-To: <bd60e5c2-e3c5-80fc-3a1d-c75809573945@redhat.com>

On Mon, 20 May 2019 at 19:33, Paolo Bonzini <pbonzini@redhat.com> 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

  reply	other threads:[~2019-05-20 11:36 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-20  8:18 [PATCH v4 0/5] KVM: LAPIC: Optimize timer latency further Wanpeng Li
2019-05-20  8:18 ` [PATCH v4 1/5] KVM: LAPIC: Extract adaptive tune timer advancement logic Wanpeng Li
2019-05-20  8:18 ` [PATCH v4 2/5] KVM: LAPIC: Fix lapic_timer_advance_ns parameter overflow Wanpeng Li
2019-05-20  8:18 ` [PATCH v4 3/5] KVM: LAPIC: Expose per-vCPU timer_advance_ns to userspace Wanpeng Li
2019-05-20  8:18 ` [PATCH v4 4/5] KVM: LAPIC: Delay trace advance expire delta Wanpeng Li
2019-05-20 11:14   ` Paolo Bonzini
2019-05-20 11:22     ` Wanpeng Li
2019-05-20 11:33       ` Paolo Bonzini
2019-05-20 11:36         ` Wanpeng Li [this message]
2019-05-20 11:41           ` Paolo Bonzini
2019-05-20 11:45             ` Wanpeng Li
2019-05-20  8:18 ` [PATCH v4 5/5] KVM: LAPIC: Optimize timer latency further Wanpeng Li
2019-05-20 11:16 ` [PATCH v4 0/5] " Paolo Bonzini
2019-05-22  8:51 ` Wanpeng Li

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