On 10/26/2016 10:00 AM, Michael Marcin wrote: [snip]
The sse emitter test used an aligned_allocator to guarantee 16 byte alignment for the std::vector data.
template< typename T > using sse_vector = vector<T, aligned_allocator<T,16> >;
I assume that vector<T>'s data is allocated with new, and new, IIUC, guarantees maximum alignment; hence, boost::alignment::is_aligned(std::vector<T>::data(),16) should always be true. What am I missing? BTW, see the new push: https://github.com/cppljevans/soa/commit/ea28ff814c8c1ea879fa5ac2453c12fc382... I've *not tested* it in: https://github.com/cppljevans/soa/blob/master/soa_compare.benchmark.cpp but I think it should work. IOW, instead of: sse_vector<float> position_x; sse_vector<float> position_y; sse_vector<float> position_z; sse_vector<float> velocity_x; sse_vector<float> velocity_y; sse_vector<float> velocity_z; sse_vector<float> acceleration_x; sse_vector<float> acceleration_y; sse_vector<float> acceleration_z; vector<float2> size; vector<float4> color; sse_vector<float> energy; vector<char> alive; I think you could use: soa_block < type_align<float,16>,// position_x; type_align<float,16>,// position_y; type_align<float,16>,// position_z; type_align<float,16>,// velocity_x; type_align<float,16>,// velocity_y; type_align<float,16>,// velocity_z; type_align<float,16>,// acceleration_x; type_align<float,16>,// acceleration_y; type_align<float,16>,// acceleration_z; float2_t,// size; float4_t,// color; type_align<float,16>,// energy; char// alive; > particles; where type_align is found here: https://github.com/cppljevans/soa/blob/master/vec_offsets.hpp#L14 HTH. -regards, Larry.