On 17/02/2015 16:02, Igor Mammedov wrote: >> > >> > Not if there are about 6 regions, I think. > When memslots where increased to 509 and look up of them was replaced on > binary search results were on par with linear search for a default 13 memslots VM. > > Adding LRU You mean MRU. :) > cache helped to shave ~40% of cycles for sequential lookup workloads. It's a bit different for vhost because you can have up to four "things" being looked up at the same time: - the s/g list that will end up in the skb - the avail/used ring - the virtio buffers - the virtio indirect buffers So you probably need multiple MRU caches. But yes, MRU can help a lot. Paolo -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
