path: root/kernel/net/sched
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authorJozsef Kadlecsik <>2014-09-30 09:46:41 +0200
committerJozsef Kadlecsik <>2014-11-18 07:56:26 +0100
commit920ddfa09efbd72a0fe43251cd19bc2c27aa3662 (patch)
treefd07063a447142eb69a6476d96d5f54f09453734 /kernel/net/sched
parent1608f755e87bb327a950a8cf21a93eb4461801d0 (diff)
Introduce RCU in all set types instead of rwlock per set
Performance is tested by Jesper Dangaard Brouer: Simple drop in FORWARD ~~~~~~~~~~~~~~~~~~~~~~ Dropping via simple iptables net-mask match:: iptables -t raw -N simple || iptables -t raw -F simple iptables -t raw -I simple -s -j DROP iptables -t raw -D PREROUTING -j simple iptables -t raw -I PREROUTING -j simple Drop performance in "raw": 11.3Mpps Generator: sending 12.2Mpps (tx:12264083 pps) Drop via original ipset in RAW table ~~~~~~~~~~~~~~~~~~~~~~~~~~~ Create a set with lots of elements:: sudo ./ipset destroy test echo "create test hash:ip hashsize 65536" > test.set for x in `seq 0 255`; do for y in `seq 0 255`; do echo "add test 198.18.$x.$y" >> test.set done done sudo ./ipset restore < test.set Dropping via ipset:: iptables -t raw -F iptables -t raw -N net198 || iptables -t raw -F net198 iptables -t raw -I net198 -m set --match-set test src -j DROP iptables -t raw -I PREROUTING -j net198 Drop performance in "raw" with ipset: 8Mpps Perf report numbers ipset drop in "raw":: + 24.65% ksoftirqd/1 [ip_set] [k] ip_set_test - 21.42% ksoftirqd/1 [kernel.kallsyms] [k] _raw_read_lock_bh - _raw_read_lock_bh + 99.88% ip_set_test - 19.42% ksoftirqd/1 [kernel.kallsyms] [k] _raw_read_unlock_bh - _raw_read_unlock_bh + 99.72% ip_set_test + 4.31% ksoftirqd/1 [ip_set_hash_ip] [k] hash_ip4_kadt + 2.27% ksoftirqd/1 [ixgbe] [k] ixgbe_fetch_rx_buffer + 2.18% ksoftirqd/1 [ip_tables] [k] ipt_do_table + 1.81% ksoftirqd/1 [ip_set_hash_ip] [k] hash_ip4_test + 1.61% ksoftirqd/1 [kernel.kallsyms] [k] __netif_receive_skb_core + 1.44% ksoftirqd/1 [kernel.kallsyms] [k] build_skb + 1.42% ksoftirqd/1 [kernel.kallsyms] [k] ip_rcv + 1.36% ksoftirqd/1 [kernel.kallsyms] [k] __local_bh_enable_ip + 1.16% ksoftirqd/1 [kernel.kallsyms] [k] dev_gro_receive + 1.09% ksoftirqd/1 [kernel.kallsyms] [k] __rcu_read_unlock + 0.96% ksoftirqd/1 [ixgbe] [k] ixgbe_clean_rx_irq + 0.95% ksoftirqd/1 [kernel.kallsyms] [k] __netdev_alloc_frag + 0.88% ksoftirqd/1 [kernel.kallsyms] [k] kmem_cache_alloc + 0.87% ksoftirqd/1 [xt_set] [k] set_match_v3 + 0.85% ksoftirqd/1 [kernel.kallsyms] [k] inet_gro_receive + 0.83% ksoftirqd/1 [kernel.kallsyms] [k] nf_iterate + 0.76% ksoftirqd/1 [kernel.kallsyms] [k] put_compound_page + 0.75% ksoftirqd/1 [kernel.kallsyms] [k] __rcu_read_lock Drop via ipset in RAW table with RCU-locking ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ With RCU locking, the RW-lock is gone. Drop performance in "raw" with ipset with RCU-locking: 11.3Mpps Performance-tested-by: Jesper Dangaard Brouer <>
Diffstat (limited to 'kernel/net/sched')
0 files changed, 0 insertions, 0 deletions