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From: Paolo Bonzini <pbonzini@redhat.com>
To: Wanpeng Li <kernellwp@gmail.com>,
	linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: "Radim Krčmář" <rkrcmar@redhat.com>
Subject: Re: [PATCH] KVM: LAPIC: Periodically revaluate appropriate lapic_timer_advance_ns
Date: Fri, 9 Aug 2019 12:24:08 +0200	[thread overview]
Message-ID: <fad8ceed-8b98-8fc4-5b6a-63bbca4059a8@redhat.com> (raw)
In-Reply-To: <1565329531-12327-1-git-send-email-wanpengli@tencent.com>

On 09/08/19 07:45, Wanpeng Li wrote:
> From: Wanpeng Li <wanpengli@tencent.com>
> 
> Even if for realtime CPUs, cache line bounces, frequency scaling, presence 
> of higher-priority RT tasks, etc can cause different response. These 
> interferences should be considered and periodically revaluate whether 
> or not the lapic_timer_advance_ns value is the best, do nothing if it is,
> otherwise recaluate again. 

How much fluctuation do you observe between different runs?

Paolo

  reply	other threads:[~2019-08-09 10:24 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-09  5:45 [PATCH] KVM: LAPIC: Periodically revaluate appropriate lapic_timer_advance_ns Wanpeng Li
2019-08-09 10:24 ` Paolo Bonzini [this message]
2019-08-12  9:06   ` Wanpeng Li
2019-08-14 12:50     ` Paolo Bonzini
2019-08-15  4:04       ` Wanpeng Li

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