Cache line padding or alignment attribute

[gilgamash]

Hi all fellow coders,

a short question, perhaps someone has some experience ( I do not have a good profiler atm to test it ): For a quick performing thread safe queue I implemented I need the nodes of the queue to be cache aligned to prevent false sharing. Any idea whether

a) Doing cache line padding

is quicker than

b) using gnu attribute

__attribute__( (aligned(c_CachelineSize)) )

?

Thanks for help,
G.