[vbox-dev] very slow installing windows 7 sp1 beta refresh

Sander van Leeuwen sander.x.van.leeuwen at oracle.com
Tue Sep 14 06:42:11 PDT 2010


  Walt,

The performance regression you're seeing is possibly fixed in the trunk 
now (not synced yet).
Look for the following commit:
     SyncPageWorkerTrackDeref 
<http://linserv.germany.sun.com/vbox/wiki/SyncPageWorkerTrackDeref>: Use 
the hint we retrieved from the cached dirty guest PT.
     Do not reset the modifications counter in InvalidatePage 
<http://linserv.germany.sun.com/vbox/wiki/InvalidatePage>.

Sander


On 9/14/2010 12:00 AM, walt wrote:
> On 09/13/2010 12:31 PM, Frank Mehnert wrote:
>> On Monday 13 September 2010, walt wrote:
>>> On 09/13/2010 05:49 AM, Frank Mehnert wrote:
>>>> On Sunday 12 September 2010, walt wrote:
>>>>> I'm using the latest OSE.svn, and I'm seeing Windows 7 guests 
>>>>> running at
>>>>> one-third the usual speed (linux host).
>>>>
>>>> We also had a check of the time which is used for a Windows 7
>>>> installation and were not able to observe any differences between 
>>>> 3.2.8
>>>> and current trunk. We tested this on an Intel Xeon E5345 (2 x 4 
>>>> cores) on
>>>> Windows Server 2008.
>>>
>>> I found the guilty commit:
>>>
>>> ------------------------------------------------------------------------ 
>>>
>>> r32410 | vboxsync | 2010-09-10 07:19:33 -0700 (Fri, 10 Sep 2010) | 2 
>>> lines
>>>
>>> Got rid of unnecessary dirty page flush in InvalidatePage. (NOTE: 
>>> high risk
>>> change)
>>> ------------------------------------------------------------------------ 
>>>
>
>> Thanks for this information! Does your host have an Intel CPU or an 
>> AMD CPU?
>
> AMD Athlon(tm) 64 X2 Dual Core Processor 4200+
>
> I've found an obvious bug in git-svn during this whole process, and 
> I'd like
> to file a helpful bug report.  If you can spare a minute or two to 
> give me
> your educated guess about it, I'd be very grateful.
>
> The clone I made of your svn repo using git-svn won't compile, and to 
> me the
> error message doesn't make any sense:
>
> kBuild: Compiling RuntimeR3 - 
> /U/wa1ter/src/vbox.git/src/VBox/Runtime/common/misc/buildconfig.cpp
> /U/wa1ter/src/vbox.git/src/VBox/Runtime/common/misc/buildconfig.cpp: 
> In function ‘uint32_t RTBldCfgRevision()’:
> /U/wa1ter/src/vbox.git/src/VBox/Runtime/common/misc/buildconfig.cpp:39: error: 
> ‘ev’ was not declared in this scope
>
> The source file is identical between your svn repo and my git-svn 
> repo, so it
> seems git-svn has messed up some other file(s) somewhere.
>
> Any wild guesses about where I should look in my git-svn repo to find 
> the real
> source of the breakage?
>
> Many thanks for your help!
>
>
>
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-- 
Kind regards / Mit freundlichen Gruessen / Met vriendelijke groet

--
Sander van Leeuwen | Senior Staff Engineer, VirtualBox
Oracle Virtualization

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