dean gaudet <[EMAIL PROTECTED]> writes: > on AMD x86 pre-family 10h the boundary is 8 bytes, and on fam 10h it's 16 > bytes. the penalty is a mere 3 cycles if an access crosses the specified > boundary.
Worth noting though, is that atomic accesses that cross cache lines on an Opteron system is going to lock down the Hypertransport fabric for you during the operation -- which is obviously not so nice. -- Arne. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/