Hi,

Ok, so it's only important because of the data that will be sent becomes longer and it could be smaller. So if I force to not pack, send it, and recive to another program that loads the data into the struct, the struct will contain the same data.
But if forcing not to align the data, when using the variables in memory will produce TLB miss or a page faults (from the link of "Data structure alignment").

Thank you very much,