On Sad, 2005-09-03 at 11:40 +1000, Nick Piggin wrote: > We'll see how things go. I'm fairly sure that for my usage it will > be a win even if it is costly. It is replacing an atomic_inc_return, > and a read_lock/read_unlock pair.
Make sure you bench both AMD and Intel - I'd expect it to be a big loss on AMD because the AMD stuff will perform atomic locked operations very efficiently if they are already exclusive on this CPU or a prefetch_w() on them was done 200+ clocks before. - 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/
