[Bf-committers] Eigen3 128bit alignment issues in ceres

[Sergey Sharybin]

Hi,

It'll help knowing ehich operation system and compiler you're using.

Thanks.

On Mon, May 28, 2012 at 7:14 AM, Stephan Kassemeyer <stapfx at gmx.de> wrote:

> Hi,
>
> in tomato branch, I get a segfault when doing video tracking.
> I turned on debug mode and got an Eigen3 assertion
> EIGEN_MAKE_UNALIGNED_ARRAY_ASSERT which mentions this
> web page:
> http://eigen.tuxfamily.org/dox-devel/TopicUnalignedArrayAssert.html
>
> I tried their suggestions, so far without any success.
> The only thing that helps is to disable all
> vectorization with the following definitions:
> CMAKE_CXX_FLAGS:STRING=-D EIGEN_DONT_VECTORIZE -D
> EIGEN_DISABLE_UNALIGNED_ARRAY_ASSERT
>
> In the backtrace,
> the last non-Eigen3 code is
>
>   FixedArray<JetT, (256 * 7) / sizeof(JetT)> x(
>        N0 + N1 + N2 + N3 + N4 + N5 + num_outputs);
>
> in extern/libmv/third_party/ceres/include/ceres/internal/autodiff:303
>
> I was compiling using cmake.
> If you have any ideas, please let me know, I can test.
>
> regards,
> Stephan Kassemeyer.
> --
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-- 
With best regards, Sergey Sharybin