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I found that alignment for char1 is 1, for char2 is 2, for char3 is 1 and for char4 is 4.
Why is the alignment size for char3 is 1 instead of 3?
I also need some help to understand the concept of “Alignment Requirements”.
Please refer to this CUDA Programming Guide (Table B-1 of Section B.3.1 in Appendix B)
Many thanks,
Yik
Think about what would happen if you had an array of
char3– an alignment of > 1 would mean a non-contiguous array.For
char4however you do not have any such padding problems, and you probably want to ensure that achar4can be treated as if it were a 32 bit int, so a 4 byte alignment is helpful.