On Mon, 9 Jun 2003, David S. Miller wrote: > From: Jamal Hadi <hadi@shell.cyberus.ca> > Date: Mon, 9 Jun 2003 08:18:50 -0400 (EDT) > > I found in my tests with a ethernet driver that prefetching the > _next_ dma descriptor gave better numbers than prefetching the > current one but i didnt spend too much time. > > Two issues: > > 1) We have some cycles to borrow for head entry, we can make > prefetch right before rcu_read_lock() > > 2) Ideally, hash chains will not exceed 1 (2 at the max) > entries. > I dont think youll see much benefit with 1 or 2 entries. I was thinking more along the lines of people with over 100K entries total; Let me run with this and get back to you. cheers, jamal - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
