Messages in this thread | | | Date | Wed, 09 Aug 2006 02:34:49 +1000 | From | Nick Piggin <> | Subject | Re: [RFC] NUMA futex hashing |
| |
Eric Dumazet wrote:
> We certainly can. But if you insist of using mmap sem at all, then we have a > problem. > > rbtree would not reduce cacheline bouncing, so : > > We could use a hashtable (allocated on demand) of size N, N depending on > NR_CPUS for example. each chain protected by a private spinlock. If N is well > chosen, we might reduce lock cacheline bouncing. (different threads fighting > on different private futexes would have a good chance to get different > cachelines in this hashtable)
See other mail. We already have a hash table ;)
-- SUSE Labs, Novell Inc. Send instant messages to your online friends http://au.messenger.yahoo.com
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |