Re: [Xen-devel] VMX status report. Xen:#16673 & Xen0: #372 -oneissuefixed

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

Does the interrupt rate change after save/restore? Perhaps we are creating a
timer-interrupt storm immediately after restore (but this should subside
quickly, or the performance drop should be much more dramatic), or we have
got the restored interrupt rate wrong somehow? Is the save/restore on the
same machine, or across machines?

 -- Keir

On 30/12/07 11:29, "Li, Xin B" <xin.b.li@xxxxxxxxx> wrote:

> I saw 32bit Vista guest becomes very slow after a save/restore if using
> default timer_mode 0, but timer_mode 2 is OK.
> -Xin 
> 
>> -----Original Message-----
>> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
>> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Li, Xin B
>> Sent: 2007年12月30日 19:23
>> To: Keir Fraser; Cui, Dexuan; You, Yongkang; xen-devel
>> Subject: RE: [Xen-devel] VMX status report. Xen:#16673 & Xen0:
>> #372 -oneissuefixed
>> 
>> will timer_mode impact guest performance after a save/restore?
>> -Xin 
>> 
>>> -----Original Message-----
>>> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
>>> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of
>> Keir Fraser
>>> Sent: 2007年12月30日 0:14
>>> To: Cui, Dexuan; You, Yongkang; xen-devel
>>> Subject: Re: [Xen-devel] VMX status report. Xen:#16673 & Xen0:
>>> #372 -oneissue fixed
>>> 
>>> Not really. I'd perhaps get Xen to dump information about all
>>> hvm_params and
>>> acceleration options and see if anythign has been dropped across the
>>> save/restore.
>>> 
>>> -- Keir
>>> 
>>> On 29/12/07 13:24, "Cui, Dexuan" <dexuan.cui@xxxxxxxxx> wrote:
>>> 
>>>> On my host, for KernelBuild test, it may vary from 3% to
>> 10%, but 30%
>>>> was also observed on others' hosts.
>>>> 
>>>> Any suggestion?
>>>> 
>>>> Thanks
>>>> -- Dexuan
>>>> 
>>>> -----Original Message-----
>>>> From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
>>>> [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of
>>> Keir Fraser
>>>> Sent: Saturday, December 29, 2007 5:20 PM
>>>> To: You, Yongkang; xen-devel
>>>> Subject: Re: [Xen-devel] VMX status report. Xen:#16673 &
>> Xen0: #372 -
>>>> oneissue fixed
>>>> 
>>>> On 29/12/07 06:40, "You, Yongkang" <yongkang.you@xxxxxxxxx> wrote:
>>>> 
>>>>> 6) HVM domain performance would downgrade, after doing
>> save/restore.
>>>> 
>>>> How much does it downgrade by?
>>>> 
>>>>  -- Keir
>>>> 
>>>> 
>>>> 
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>>> 
>>> 
>>> 
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>> 



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