memory-alignment

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Data size and disk access

Is there a benefit to aligning data to a certain size on storage?For example, if I have the option to use one byte to store information or 4 bytes, which is preferred (assuming that storage size doesn[详细]

2023-04-10 02:09 分类：问答
How to set the alignment in a platform independent way?

In the latest draft of the c++11 standard, chapter 3.11 talks about the alignment. Later, the chapter 7.6.1 defines how to define an aligned structures (or variables?)[详细]

2023-04-06 05:27 分类：问答
Speed of operations on misaligned data

To my knowledge, a CPU performs best with a datum that is aligned on the boundary equal to the size of that datum. For example, if every int datum is 4 bytes in size, then the address of every int mus[详细]

2023-04-05 16:00 分类：问答
Where can I find documentation on C++ memory alignment across different platforms/compilers?

I\'m looking for a good (comprehensive) doc about memory alignment in C++, typical approaches, differences between compilers, and common pitfalls. Just to check if my understanding of the topic is cor[详细]

2023-04-03 03:45 分类：问答
Aligning to cache line and knowing the cache line size

To prevent false sharing, I want to align each element of an array to a cache line. So first I need to know the size of a cache line, so I assign each element that amount of bytes. Secondly I want the[详细]

2023-04-01 18:57 分类：问答
padding at last member of c struct

I always assume, as they said here http://en.wikipedia.org/wiki/Data_structure_alignment, \"It is important to note that the last member is padded with the number of bytes required so that the total s[详细]

2023-03-31 22:41 分类：问答
How can I portably implement row-wise binding of arbitrary resultsets in ODBC while avoiding alignment issues?

I have a class which takes an SQL query, executes it, then binds every column in the resultset as SQL_C_WCHAR using row-wise binding.[详细]

2023-03-28 01:28 分类：问答
How can I simulate alignas(T)?

I have an开发者_运维技巧 array which is used as the underlying memory of an object of type T: char memory[sizeof T];[详细]

2023-03-26 09:02 分类：问答
Set double[] from float* in initialization list

I have a class that looks roughly like this: template<std::size_t dim> class Foo { public: Foo(void const * const data);[详细]

2023-03-23 03:15 分类：问答
Writing more characters than malloced. Why does it not fail?

Why does the following work and not throw some kind of segmentation fault? char *path = \"/usr/bin/\";[详细]

2023-03-21 05:18 分类：问答