[Insight-developers] Dashboard Cleanup: RogueResearch6 : itkStatisticsAlgorithmTest : LLVM compiler

[Bradley Lowekamp]

Hello Luis,

Attached are the changes that I made to the review statistics that may be relevant or not. I don't recall what the problem I was trying to fix at the time but I hope it helps.



Brad

On Jan 19, 2010, at 8:16 PM, Luis Ibanez wrote:

> Hi Sean,
> 
> More information on this topic:
> 
> A) Running Valgrind on the standard gcc build (not the llvm)
>     did not reported any problems.
> 
> B) When building the REVIEW_STATISTICS with llvm,
>     the test itkStatisticsAlgorithmTest passes fine (0.3 seconds),
>     but the itkStatisticsAlgorithmTest2 gets trapped in an infinite loop.
> 
> C) Running (B) in gdb uses a single core (out of the two that are
>     available), gets in the infinite loop, and ... when interrumpting it,
>     we land as well in the InsertSort() method.
> 
> 
> To summarize:
> 
> The problem is still there in the REVIEW_STATISTICS code.
> 
> (and "may" be something different from uninitialized variables,
> or out-of-bounds access...         not 100% sure on this though...).
> 
> 
> It looks like we will have to just walk through the steps of the
> InsertSort() algorithm....
> 
> 
> 
>            Luis
> 
> 
> 
> ----------------------------------------------------------
> On Tue, Jan 19, 2010 at 7:47 PM, Luis Ibanez <luis.ibanez at kitware.com> wrote:
>> Hi Sean,
>> 
>> Thanks a lot for these additional details.
>> 
>> There are indeed very helpful.
>> 
>> I have managed to reproduce the problem in my laptop.
>> 
>>    *   Ubuntu 9.10 64 bits
>>    *   Compiler LLVM-gcc-4.2  (64 bits) (1) below
>>    *   Building for Debug (enabled in ccmake)
>> 
>> 
>> (1) [ /usr/lib/llvm/llvm/gcc-4.2/bin/x86_64-linux-gnu-llvm-g++ ]
>> 
>> 
>> When running, the test takes all the CPU, (dual core).
>> Stays in an infinite loop,  and when interrupting it,
>> it lands in itkStatisticsAlgorithmTest.cxx:150.
>> 
>>                         InsertSort()
>> 
>> An important  observation is that in RogueResearch6, the
>> REVIEW flags is OFF, and so is the REVIEW_STATISTICS.
>> That's how I build it also in my laptop.
>> 
>> I'm now testing it with REVIEW_STATISTICS   ON
>> (with the hope that the new code may not have this problem..)   :-)
>> 
>> 
>> I'll keep tracking it..
>> 
>> 
>> 
>>     Thanks
>> 
>> 
>> 
>> ---------------------------------------------------------------------------
>> On Tue, Jan 19, 2010 at 10:30 AM, Sean McBride <sean at rogue-research.com> wrote:
>>> On 1/18/10 7:11 PM, Luis Ibanez said:
>>> 
>>>> Anything special about this machine/platform
>>>> that could give us a clue about the potential
>>>> source of the problem ?
>>>> 
>>>> I see that it is 64 bits,...(something else?)
>>> 
>>> It's Debug (it works in Release).  And it uses the llvm-gcc compiler.
>>> 
>>>> An interesting first thing to try would be to
>>>> run this test in a single thread.
>>>> 
>>>> You can do this from the command line by
>>>> adding --without-threads to the command
>>>> that executes the test.
>>> 
>>> No change. :(
>>> 
>>> Anyone know if this test passes with valgrind?  (I'd try, but valgrind
>>> supports only 10.5, not 10.6).
>>> 
>>> --
>>> ____________________________________________________________
>>> Sean McBride, B. Eng                 sean at rogue-research.com
>>> Rogue Research                        www.rogue-research.com
>>> Mac Software Developer              Montréal, Québec, Canada
>>> 
>>> 
>>> 
>> 
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========================================================
Bradley Lowekamp  
Lockheed Martin Contractor for
Office of High Performance Computing and Communications
National Library of Medicine 
blowekamp at mail.nih.gov


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