From: "Radim Krčmář" <rkrcmar@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>,
Eduardo Habkost <ehabkost@redhat.com>,
qemu-devel@nongnu.org, kvm@vger.kernel.org
Subject: Re: [Qemu-devel] invtsc + migration + TSC scaling
Date: Tue, 18 Oct 2016 15:38:01 +0200 [thread overview]
Message-ID: <20161018133800.GA3492@potion> (raw)
In-Reply-To: <20161018133619.GB2205@potion>
2016-10-18 15:36+0200, Radim Krčmář:
> 2016-10-17 18:24+0200, Paolo Bonzini:
>> We should also blacklist the TSC deadline timer when invtsc is not
>> available.
>
> True.
>
> I was thinking that with Wanpeng's VMX preemption patches, we might not
> need the TSC nor paravirtual deadline timer, the because performance of
> LAPIC one-shot could be very similar.
No, I sent before thinking -- deadline timer also has better precision,
so it is still useful.
next prev parent reply other threads:[~2016-10-18 13:38 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-14 21:20 [Qemu-devel] invtsc + migration + TSC scaling Eduardo Habkost
2016-10-17 9:47 ` Marcelo Tosatti
2016-10-17 14:50 ` Radim Krčmář
2016-10-17 16:24 ` Paolo Bonzini
2016-10-17 21:11 ` Eduardo Habkost
2016-10-17 23:58 ` Marcelo Tosatti
2016-10-18 13:41 ` Paolo Bonzini
2016-10-18 17:09 ` Marcelo Tosatti
2016-10-18 20:52 ` Radim Krčmář
2016-10-18 21:05 ` Eduardo Habkost
2016-10-19 13:27 ` Radim Krčmář
2016-10-19 13:55 ` Eduardo Habkost
2016-10-19 15:42 ` Radim Krčmář
2016-10-19 17:42 ` Eduardo Habkost
2016-10-18 13:48 ` Radim Krčmář
2016-10-18 13:36 ` Radim Krčmář
2016-10-18 13:38 ` Radim Krčmář [this message]
2016-10-17 17:20 ` Marcelo Tosatti
2016-10-18 13:27 ` Radim Krčmář
2016-10-18 9:04 ` Dr. David Alan Gilbert
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