From: Marcelo Tosatti <mtosatti@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: kvm-devel <kvm@vger.kernel.org>,
Eduardo Habkost <ehabkost@redhat.com>,
Chris Wright <chrisw@redhat.com>
Subject: Re: KVM: MMU: optimize set_spte for page sync
Date: Wed, 10 Dec 2008 13:54:08 +0100 [thread overview]
Message-ID: <20081210125408.GA22748@dmt.cnet> (raw)
In-Reply-To: <493F8882.6040801@redhat.com>
On Wed, Dec 10, 2008 at 11:14:42AM +0200, Avi Kivity wrote:
> Marcelo Tosatti wrote:
>> Do you have objections for submitting this patch for 2.6.28 ? The hash
>> lookup kills performance of pagetable write + context switch intensive
>> workloads.
>>
>
> Can you quantify?
>
> 2.6.28 is out of the question, 2.6.28.stable is possible, depending on
> the actual performance difference. I'd hate to introduce a correctness
> problem just to improve performance.
Around 10% improvement on some workloads.
prev parent reply other threads:[~2008-12-10 15:56 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-21 18:49 KVM: MMU: optimize set_spte for page sync Marcelo Tosatti
2008-11-23 10:36 ` Avi Kivity
2008-11-24 12:04 ` Marcelo Tosatti
2008-11-24 13:23 ` Marcelo Tosatti
2008-11-25 14:38 ` Avi Kivity
2008-11-25 14:58 ` Marcelo Tosatti
2008-11-26 11:12 ` Avi Kivity
2008-12-09 15:52 ` Marcelo Tosatti
2008-12-10 9:14 ` Avi Kivity
2008-12-10 12:54 ` Marcelo Tosatti [this message]
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