From: Xiao Guangrong <xiao.grong@gmail.com>
To: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Cc: Avi Kivity <avi@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>,
LKML <linux-kernel@vger.kernel.org>, KVM <kvm@vger.kernel.org>
Subject: Re: [PATCH v4 00/11] KVM: x86: optimize for writing guest page
Date: Fri, 04 Nov 2011 17:16:04 +0800 [thread overview]
Message-ID: <4EB3AD54.9050605@gmail.com> (raw)
In-Reply-To: <4E940018.1010908@cn.fujitsu.com>
On 10/11/2011 04:36 PM, Xiao Guangrong wrote:
> On 10/09/2011 09:37 PM, Avi Kivity wrote:
>> On 10/09/2011 02:24 PM, Avi Kivity wrote:
>>> On 10/08/2011 06:06 AM, Xiao Guangrong wrote:
>>>> On 10/07/2011 01:53 AM, Marcelo Tosatti wrote:
>>>>> On Thu, Sep 22, 2011 at 04:52:40PM +0800, Xiao Guangrong wrote:
>>>>>> This patchset is against https://github.com/avikivity/kvm.git next branch.
>>>>>>
>>>>>> In this version, some changes come from Avi's comments:
>>>>>> - fix instruction retried for nested guest
>>>>>> - skip write-flooding for the sp whose level is 1
>>>>>> - rename some functions
>>>>>
>>>>> Please rebase.
>>>>>
>>>>>
>>>>
>>>> Marcelo,
>>>>
>>>> These patches can be applied without any conflict and it also works well,
>>>> the current code was pulled from https://github.com/avikivity/kvm.git next branch.
>>>>
>>>> What problem did you meet when you applied these? :(
>>>
>>> I guess it was a user error - it applies cleanly here too (and pushed to next, thanks).
>>>
>>
>> However, it seems to reduce performance.
>>
>
> Ouch, will look into it soon.
Hi Avi,
I have done kernbench tests several times on my desktop, but it shows
very well:
before patchset:
real 212.27
real 213.47
real 204.99
real 200.58
real 199.99
real 199.94
real 201.51
real 199.83
real 198.19
real 205.13
after patchset:
real 199.90
real 201.89
real 194.54
real 188.71
real 185.75
real 187.70
real 188.99
real 188.53
real 186.29
real 188.25
I will test it on our server using kvm-autotest, could you share me your
config file please?
next prev parent reply other threads:[~2011-11-04 9:16 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-22 8:52 [PATCH v4 00/11] KVM: x86: optimize for writing guest page Xiao Guangrong
2011-09-22 8:53 ` [PATCH v4 01/11] KVM: MMU: avoid pte_list_desc running out in kvm_mmu_pte_write Xiao Guangrong
2011-09-22 8:53 ` [PATCH v4 02/11] KVM: x86: tag the instructions which are used to write page table Xiao Guangrong
2011-09-22 8:55 ` [PATCH v4 04/11] KVM: x86: cleanup port-in/port-out emulated Xiao Guangrong
2011-09-22 8:55 ` [PATCH v4 05/11] KVM: MMU: do not mark accessed bit on pte write path Xiao Guangrong
2011-09-22 8:56 ` [PATCH v4 06/11] KVM: MMU: cleanup FNAME(invlpg) Xiao Guangrong
2011-09-22 8:56 ` [PATCH v4 07/11] KVM: MMU: fast prefetch spte on invlpg path Xiao Guangrong
2011-09-22 8:56 ` [PATCH v4 08/11] KVM: MMU: remove unnecessary kvm_mmu_free_some_pages Xiao Guangrong
2011-09-22 8:57 ` [PATCH v4 09/11] KVM: MMU: split kvm_mmu_pte_write function Xiao Guangrong
2011-09-22 8:57 ` [PATCH v4 10/11] KVM: MMU: fix detecting misaligned accessed Xiao Guangrong
2011-09-22 8:58 ` [PATCH v4 11/11] KVM: MMU: improve write flooding detected Xiao Guangrong
2011-09-22 9:02 ` [PATCH v4 03/11] KVM: x86: retry non-page-table writing instructions Xiao Guangrong
2011-09-23 11:51 ` [PATCH v4 00/11] KVM: x86: optimize for writing guest page Marcelo Tosatti
2011-09-30 3:49 ` Xiao Guangrong
2011-10-05 13:25 ` Avi Kivity
2011-10-06 17:50 ` Marcelo Tosatti
2011-10-06 17:53 ` Marcelo Tosatti
2011-10-08 4:06 ` Xiao Guangrong
2011-10-09 12:24 ` Avi Kivity
2011-10-09 13:37 ` Avi Kivity
2011-10-11 8:36 ` Xiao Guangrong
2011-11-04 9:16 ` Xiao Guangrong [this message]
2011-11-06 15:35 ` Avi Kivity
2011-11-10 13:28 ` Xiao Guangrong
2011-11-10 14:05 ` Avi Kivity
2011-11-11 3:42 ` Xiao Guangrong
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