Comment by kbolino

I don't see this mentioned anywhere else, but Go may start experimenting with rearranging struct fields at some point. The marker type structs.HostLayout has been added in Go 1.24 to indicate that you want the struct to follow the platform's layout rules (think of it like #[repr(C)] in Rust). This may become necessary to ensure the padding actually sits between the two falsely shared fields. You could combine it with the padding technique like this:

  type PaddedExample struct {
    _       structs.HostLayout
    Field1  int64
    _       [56]byte
    Field2  int64
  }