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# hololink::module::PAGE_SIZE

> Alignment, in bytes, that the device requires of the frame data it transfers.

Alignment, in bytes, that the device requires of the frame data it transfers.

```cpp showLineNumbers={false}
constexpr uint32_t hololink::module::PAGE_SIZE = 128
```

Each frame's data, and the metadata block that follows it, begin at an offset that is a multiple of this value, and the sizes of buffers that hold them are rounded up to a multiple of it; use `round_up(size,
PAGE_SIZE)` to do so. It is a power of two.

This is the device's own granularity. It has no relation to the host operating system's memory page size.