On 06/13/2011 07:46 AM, Xiao Guangrong wrote:
>>
>> and it has little heavy sine we need to walk guest page table,
>> and build spte under mmu-lock.
>
> For shadow, yes, this is a good optimization. But with nested paging it
slow things down. We already have the gpa, so all we need to do is
On 06/12/2011 04:47 PM, Avi Kivity wrote:
> On 06/10/2011 07:05 AM, Xiao Guangrong wrote:
>> On 06/09/2011 03:39 PM, Avi Kivity wrote:
>>
>> > First, I think we should consider dropping bypass_guest_pf completely,
>> > just so we have less things to think about.
>> >
>>
>> I agree.
>
> Great, pl
On 06/10/2011 07:05 AM, Xiao Guangrong wrote:
On 06/09/2011 03:39 PM, Avi Kivity wrote:
> First, I think we should consider dropping bypass_guest_pf completely, just
so we have less things to think about.
>
I agree.
Great, please post a patch.
> I'm also not sure RCU is enough protection
On 06/09/2011 03:39 PM, Avi Kivity wrote:
> First, I think we should consider dropping bypass_guest_pf completely, just
> so we have less things to think about.
>
I agree.
> I'm also not sure RCU is enough protection - we can unlink a page in the
> middle of a hierarchy,
I think it is ok, it
On 06/07/2011 03:58 PM, Xiao Guangrong wrote:
The idea of this patchset is from Avi:
| We could cache the result of a miss in an spte by using a reserved bit, and
| checking the page fault error code (or seeing if we get an ept violation or
| ept misconfiguration), so if we get repeated mmio on a
On Wed, 08 Jun 2011 14:22:36 +0800
Xiao Guangrong wrote:
> On 06/08/2011 11:47 AM, Takuya Yoshikawa wrote:
>
> >>> Sure, KVM guest is the client, and it uses e1000 NIC, and uses NAT
> >>> network connect to the netperf server, the bandwidth of our network
> >>> is 100M.
> >>>
> >
> > I see the
On 06/08/2011 11:47 AM, Takuya Yoshikawa wrote:
>>> Sure, KVM guest is the client, and it uses e1000 NIC, and uses NAT
>>> network connect to the netperf server, the bandwidth of our network
>>> is 100M.
>>>
>
> I see the reason, thank you!
>
> I used virtio-net and you used e1000.
> You are usi
On 06/08/2011 11:47 AM, Takuya Yoshikawa wrote:
>>> Sure, KVM guest is the client, and it uses e1000 NIC, and uses NAT
>>> network connect to the netperf server, the bandwidth of our network
>>> is 100M.
>>>
>
> I see the reason, thank you!
>
> I used virtio-net and you used e1000.
> You are usi
On Wed, 08 Jun 2011 11:32:12 +0800
Xiao Guangrong wrote:
> On 06/08/2011 11:25 AM, Xiao Guangrong wrote:
> > On 06/08/2011 11:11 AM, Takuya Yoshikawa wrote:
> >> On Tue, 07 Jun 2011 20:58:06 +0800
> >> Xiao Guangrong wrote:
> >>
> >>> The performance test result:
> >>>
> >>> Netperf (TCP_RR):
>
On 06/08/2011 11:25 AM, Xiao Guangrong wrote:
> On 06/08/2011 11:11 AM, Takuya Yoshikawa wrote:
>> On Tue, 07 Jun 2011 20:58:06 +0800
>> Xiao Guangrong wrote:
>>
>>> The performance test result:
>>>
>>> Netperf (TCP_RR):
>>> ===
>>> ept is enabled:
>>>
>>> Before
On 06/08/2011 11:11 AM, Takuya Yoshikawa wrote:
> On Tue, 07 Jun 2011 20:58:06 +0800
> Xiao Guangrong wrote:
>
>> The performance test result:
>>
>> Netperf (TCP_RR):
>> ===
>> ept is enabled:
>>
>> Before After
>> 1st 709.58 734.60
>> 2nd 715.40
On Tue, 07 Jun 2011 20:58:06 +0800
Xiao Guangrong wrote:
> The performance test result:
>
> Netperf (TCP_RR):
> ===
> ept is enabled:
>
> Before After
> 1st 709.58 734.60
> 2nd 715.40 723.75
> 3rd 713.45 724.22
>
> ept=0 bypas
The idea of this patchset is from Avi:
| We could cache the result of a miss in an spte by using a reserved bit, and
| checking the page fault error code (or seeing if we get an ept violation or
| ept misconfiguration), so if we get repeated mmio on a page, we don't need to
| search the slot list/t
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