From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: Re: [patch 00/12] fake ACPI C2 emulation v2
Date: Mon, 2 Jun 2008 13:08:59 -0300
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Cc: Chris Wright <chrisw@redhat.com>,
	Glauber Costa <gcosta@redhat.com>,
	Anthony Liguori <aliguori@us.ibm.com>, kvm@vger.kernel.org
To: Avi Kivity <avi@qumranet.com>
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On Sun, Jun 01, 2008 at 12:21:29PM +0300, Avi Kivity wrote:
> Marcelo Tosatti wrote:
>> Addressing comments on the previous patchset, follows:
>>
>> - Same fake C2 emulation
>> - /dev/pmtimer
>> - Support for multiple IO bitmap pages + userspace interface
>> - In-kernel ACPI pmtimer emulation
>>
>> Tested with Linux and WinXP guests. Also tested migration.
>>   
>
> Do you have any performance numbers, comparing qemu/kernel/passthrough?

Test is 1 million gettimeofday calls, Xeon 1.60GHz with 4MB L2.

guest (qemu emulation):
cycles:1189759332

guest (in-kernel emulation):
cycles:628046412

guest (direct pmtimer):
cycles:230372934

host (TSC):
cycles:14862774

> [Real review will be delayed as I am travelling; will try to do as much as 
> I can]

OK!