Alpha4 release status

Sun Jun 10 16:43:50 UTC 2012

Hi Harry,

  Unfortunately personally, I never managed to make a profiler work on Android :(

I have a hunch why this happens, but I have to wait a until my super old laptop 
finish the compilation. Anyway if my hunch will not be true, I'm not going to check 
all those the patches one by one :), I'll use divide and conquer algorithm :).

Cheers,
BogDan.

>________________________________
> From: Harri Pasanen <harri at mpaja.com>
>To: necessitas-devel at kde.org 
>Sent: Sunday, June 10, 2012 6:47 PM
>Subject: Re: Alpha4 release status
> 
>If it is that big, 2-4 times, I suspect some file system access issue.
>
>Guesswork aside, has anyone played with profilers on ARM/Android?    
>Quick google shows that oprofile should work on a rooted/developer phone.
>
>On linux I've in the past used gprof and callgrind with success.  
>Gprof2Dot is a nice tool for visualizing the result and quickly zeroing 
>on the culprit. See http://code.google.com/p/jrfonseca/wiki/Gprof2Dot
>(also supports oprofile).
>
>If profiling is possible, I suspect it is faster to find the problem 
>that way than by trying the patches one by one.
>
>Just my 2 cents,
>
>Harri
>
>
>On 06/10/2012 03:52 PM, BogDan Vatra wrote:
>> Hello folks,
>>
>>    Unfortunately I have more bad news regarding alpha4 release, I
>> manage to fix the OpenGL problem, but I discover another one. The
>> startup of all applications has slowdown a lot (2-4 times), the
>> problem is the difference between alpha3 and alpha4 is huge (1000+
>> patches). Alpha3 is based on Qt 4.8.0-rc and alpha4 is based on Qt
>> 4.8.2, to be sure the problem is not caused by me, I have to
>> cherry-pick all my changes and put them on top of alpha3, them, if is
>> not my fault the pain begins, I'll have to merge Qt 4.8.0, check, then
>> Qt 4.8.1, then Qt 4.8.2. This is going to be a very slow and painful
>> process which will take days (even weeks) so, I don't believe alpha4
>> will be out before QCS, unless a miracle happens and I'll found the
>> issue in the next days.
>>
>> Sorry for the bad news ...
>>
>> Cheers,
>> BogDan.
>>
>>
>> 2012/6/4 BogDan<taipanromania at gmail.com>:
>>> This http://files.kde.org/necessitas/installer/MinistroActivity.apk is
>>> the link to Ministro.
>>>
>>> BogDan.
>>>
>>>
>>> On Jun 4, 2:02 pm, BogDan Vatra<taipanroma... at gmail.com>  wrote:
>>>> Hi everyone,
>>>>
>>>>   As you may know the alpha4 release is approaching, the plan is to
>>>> have it ready before Qt Contributors Summit. It is almost completed, I
>>>> need a few days to polish the style plugin and Minitro and another few
>>>> to add support for context menus.
>>>>
>>>>    A few days ago I pushed to Minnistro's "unstable" repository the
>>>> current alpha4 branch in order to check if the existing released apps
>>>> are still working. Even we've made some heavy changes and even if I
>>>> warn you that it may break the compatibility with older versions, I
>>>> wanted alpha4 to be backward compatible with alpha3, it is also a test
>>>> for Necessitas developers to see if we can keep our promise: to ship
>>>> releases which are backward compatible!
>>>>
>>>> If you want to try it yourself please follow the next two steps:
>>>>   - uninstall official Ministro and use this onehttp://files.kde.org/necessitas/MinistroActivity.apk.
>>>>   - install and run Ministro configuration tool (from market) and
>>>> choose unstable repository.
>>>>
>>>> Don't forget that Ministro is not stable and it may crash/hang, if you
>>>> encounter any problems please reply on this thread.
>>>>
>>>> Shorty after the repository was ready, I tried a few apps from market
>>>> and two major problems pop up:
>>>> - The first problem was related to some missing symbols and was caused
>>>> by compilation/linking flags.
>>>> - The second one is related to OpenGL and it seems to be caused by the
>>>> merge with Qt 4.8.2.
>>>>
>>>> 1. Missing symbols problem: Android comes with almost no support for
>>>> C++, so to compile Qt we used (static) gnu-libstdc++.
>>>> Then I discovered that this was a big mistake (for more information
>>>> check Android NDK docs/CPLUSPLUS-SUPPORT.html "II.3. Static runtimes:"
>>>> section).
>>>> We can not use link libstdc++ statically if we are using more than one
>>>> shared libraries in a project. To fix this problem I had two choices:
>>>>   - to use the shared libstdc++ implementation and to change all the
>>>> scripts in order to add it to ministro (1.2M).
>>>>   - to "embed" the whole library into QtCore library (it adds and extra
>>>> 600K) but this change requires no additional changes.
>>>>
>>>> I choose the second one [1],[2] because it was safe and easy and
>>>> mostly because it didn't needed any other changes.
>>>> If anybody has something against this change speak now or forever hold
>>>> your peace !
>>>>
>>>> I'd like to add exceptions and RTTI by default, if the size and speed
>>>> will not be affected.
>>>>
>>>> 2. OpenGL problem: After I merged alpha4 branch with upstream Qt
>>>> 4.8.2, most of the OpenGL apps are not working anymore, I tried to fix
>>>> it my self but I end up with a very ugly workarround. It seems that
>>>> "boolQGLContext::areSharing(constQGLContext*context1,constQGLContext*contex t2)"
>>>> always returns false. I tried to trace the problem but with no luck
>>>> and I end up adding a super dirty workarround: on android,
>>>> "QGLContext::areSharing", will always returns true. I really don't
>>>> like it, so until we'll figure out what is wrong the release process
>>>> will stop ...
>>>>
>>>> Any help will on this matter be very appreciated !
>>>>
>>>> I've spot another minor problem with old assets support it was caused
>>>> by "QString QDeclarativeTypeLoader::absoluteFilePath(const QString
>>>> &path)" I fixed it locally but I didn't had time to push the fix to
>>>> Minsitro's repository yet.
>>>> I'll keep you post with the progress and with any Ministro repository changes.
>>>>
>>>> Cheers,
>>>> BogDan.
>>>>
>>>> [1]http://quickgit.kde.org/index.php?p=android-qt.git&a=commit&h=8c4c862...
>>>> [2]http://quickgit.kde.org/index.php?p=android-qt.git&a=commit&h=abe85f4...
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