From: Avi Kivity <avi@redhat.com>
To: Christoffer Dall <cdall@cs.columbia.edu>
Cc: KVM General <kvm@vger.kernel.org>
Subject: Re: vmexit cycle cost
Date: Sun, 18 Nov 2012 16:16:37 +0200 [thread overview]
Message-ID: <50A8EDC5.7010709@redhat.com> (raw)
In-Reply-To: <CAEDV+gKNOXx-5E-U_dCdem=VrkK-gE8j4nt-RScg0Rxq1K-6qw@mail.gmail.com>
On 11/16/2012 06:56 PM, Christoffer Dall wrote:
> Hi all,
>
> just a quick question: using the kvm-unittest vmexit test, it seems
> using a VMCALL for exit, a round-trip to the host takes roughly 1000
> cycles on a modern processor. This number sounds quite low to me. Can
> anyone verify if it's reasonable or have more data on this number has
> developed over time given newer processors?
It's reasonable, not low (this number can never be low enough).
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2012-11-18 14:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-16 16:56 vmexit cycle cost Christoffer Dall
2012-11-18 14:16 ` Avi Kivity [this message]
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