From: Marcelo Tosatti <marcelo@kvack.org>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: kvm-devel@lists.sourceforge.net, Avi Kivity <avi@qumranet.com>
Subject: Re: [patch 0/5] KVM paravirt MMU updates and cr3 caching
Date: Sat, 16 Feb 2008 23:24:30 -0300 [thread overview]
Message-ID: <20080217022430.GA2454@dmt> (raw)
In-Reply-To: <47B7739C.8090806@codemonkey.ws>
On Sat, Feb 16, 2008 at 05:37:00PM -0600, Anthony Liguori wrote:
> Marcelo Tosatti wrote:
> >The following patchset, based on earlier work by Anthony and Ingo, adds
> >paravirt_ops support for KVM guests enabling hypercall based pte updates,
> >hypercall batching and cr3 caching.
> >
>
> Could you post performance results for each optimization? I'm
> particularly curious if the hypercall batching is very useful.
Batched hypercall pte updates give 8.5% performance improvement on
kernel compile:
http://www.mail-archive.com/kvm-devel@lists.sourceforge.net/msg12395.html
I can get separate results tomorrow or Monday, but I'm sure batching
plays a significant role. For the kernel compile test, there is an
average of 5 pte updates per batched hypercall.
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next prev parent reply other threads:[~2008-02-17 2:24 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20080216220924.733723618@redhat.com>
2008-02-16 22:09 ` [patch 1/5] KVM: add basic paravirt support Marcelo Tosatti
2008-02-16 22:09 ` [patch 2/5] KVM: hypercall based pte updates and TLB flushes Marcelo Tosatti
2008-02-16 22:09 ` [patch 3/5] KVM: hypercall batching Marcelo Tosatti
2008-02-16 22:09 ` [patch 4/5] KVM: ignore zapped root pagetables Marcelo Tosatti
2008-02-16 22:09 ` [patch 5/5] KVM: VMX cr3 cache support Marcelo Tosatti
2008-02-16 23:37 ` [patch 0/5] KVM paravirt MMU updates and cr3 caching Anthony Liguori
2008-02-17 2:24 ` Marcelo Tosatti [this message]
[not found] ` <20080216221220.843135254@redhat.com>
2008-02-17 8:28 ` [patch 2/5] KVM: hypercall based pte updates and TLB flushes Avi Kivity
2008-02-17 13:13 ` Avi Kivity
2008-02-17 14:51 ` Marcelo Tosatti
2008-02-17 14:57 ` Avi Kivity
2008-02-18 5:00 ` Marcelo Tosatti
2008-02-17 8:32 ` Avi Kivity
[not found] ` <20080216221220.924823582@redhat.com>
2008-02-17 8:40 ` [patch 3/5] KVM: hypercall batching Avi Kivity
2008-02-18 16:47 ` Marcelo Tosatti
2008-02-17 18:40 ` Hollis Blanchard
2008-02-18 8:06 ` Avi Kivity
2008-02-18 8:43 ` Christian Borntraeger
2008-02-18 8:47 ` Avi Kivity
[not found] ` <1203361276.3428.6.camel@basalt>
2008-02-19 8:30 ` Avi Kivity
[not found] ` <20080216221221.002948712@redhat.com>
2008-02-17 8:52 ` [patch 4/5] KVM: ignore zapped root pagetables Avi Kivity
2008-02-16 22:09 [patch 0/5] KVM paravirt MMU updates and cr3 caching Marcelo Tosatti
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