Hi Martin,
On Wednesday, July 12, 2017 at 6:05:30 PM UTC+2, Martin Kronbichler wrote:
>
> Hi Denis,
>
> what is a? Is it an element of an array? If yes, is the array of type
> AlignedVector (or derived from that).
>
no, it's just a member variable VectorizedArray:
VectorizedArray<value_type> a;
> You get this kind of error when there is a load or store to an address
> that is not aligned by the size of the vectorized array, 32 bytes in your
> case. The data types VectorizedArray make the compiler insert 'aligned
> load/store' type of operations, which cannot always be guaranteed.
>
> Can you try to look at the problem in a debugger, e.g. gdb and post the
> offending assembler line and a few before that to see the context?
>
here they are:
0x7ffff73913b1 <Operator<3, 2, 3, LA::d::Vector<float> >::Operator()+9>
mov %rdi,%rbx
│0x7ffff73913b4 <Operator<3, 2, 3, LA::d::Vector<float>
>::Operator()+12> callq 0x7ffff71d1f90
<_ZN6dealii19MatrixFreeOperators4BaseILi3ENS_13LinearAlgebra11distributed6VectorIfEEEC2Ev@plt
│0x7ffff73913b9 <Operator<3, 2, 3, LA::d::Vector<float>
>::Operator()+17> mov 0x9ecd60(%rip),%rax # 0x7ffff7d7e120
│0x7ffff73913c0 <Operator<3, 2, 3, LA::d::Vector<float>
>::Operator()+24> lea 0x10(%rax),%rax
│0x7ffff73913c4 <Operator<3, 2, 3, LA::d::Vector<float>
>::Operator()+28> mov %rax,(%rbx)
│0x7ffff73913c7 <Operator<3, 2, 3, LA::d::Vector<float>
>::Operator()+31> vxorps %xmm0,%xmm0,%xmm0
>│0x7ffff73913cb <Operator<3, 2, 3, LA::d::Vector<float>
>::Operator()+35> vmovaps %ymm0,0xe0(%rbx)
│0x7ffff73913d3 <Operator<3, 2, 3, LA::d::Vector<float>
>::Operator()+43> vmovaps 0x64ffc5(%rip),%ymm0 # 0x7ffff79e13a0
│0x7ffff73913db <Operator<3, 2, 3, LA::d::Vector<float>
>::Operator()+51> vmovaps %ymm0,0x100(%rbx)
│0x7ffff73913e3 <Operator<3, 2, 3, LA::d::Vector<float>
>::Operator()+59> mov -0x8(%rbp),%rbx
│0x7ffff73913e7 <Operator<3, 2, 3, LA::d::Vector<float>
>::Operator()+63> leaveq
│0x7ffff73913e8 <Operator<3, 2, 3, LA::d::Vector<float>
>::Operator()+64> retq
(I did a few replacement to ease the readability). Hopefully you can make
sense out of it.
Regards,
Denis.
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