Re: SO_REUSEPORT - can it be done in kernel?

Thomas Graf
2011-03-01T13:51:00Z

On Tue, Mar 01, 2011 at 08:19:51PM +0800, Herbert Xu wrote:
> On Tue, Mar 01, 2011 at 07:18:29AM -0500, Thomas Graf wrote:
> >
> >
> > ... makes it use CPU 5 for rxq2 and the qps goes up from 250kqps to 270kqps
>
> I think the increase here comes from the larger number of packets
> in flight more than anything.
>
> The bottleneck is still the TX queue (both software and hardware).

Disabled netfilter and reran test

Now does ~316kqps (rx was split over 2 queues)

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PerfTop: 30608 irqs/sec kernel:66.1% exact: 0.0% [1000Hz cpu-clock-msecs], (all, CPU: 1)
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samples pcnt function DSO
_______ _____ _____________________________ ___________________________________________________________

19237.00 5.6% _raw_spin_unlock_irqrestore /lib/modules/2.6.38-rc5+/build/vmlinux
17170.00 5.0% get_rx_page_info /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
11411.00 3.3% be_poll_rx /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
11320.00 3.3% isc_rwlock_lock /usr/lib64/libisc.so.62.0.1
10669.00 3.1% __do_softirq /lib/modules/2.6.38-rc5+/build/vmlinux
10655.00 3.1% get_page_from_freelist /lib/modules/2.6.38-rc5+/build/vmlinux
9523.00 2.8% intel_idle /lib/modules/2.6.38-rc5+/build/vmlinux
8677.00 2.5% __udp4_lib_lookup /lib/modules/2.6.38-rc5+/build/vmlinux
8379.00 2.4% sock_queue_rcv_skb /lib/modules/2.6.38-rc5+/build/vmlinux
8226.00 2.4% sk_run_filter /lib/modules/2.6.38-rc5+/build/vmlinux
6724.00 1.9% __netif_receive_skb /lib/modules/2.6.38-rc5+/build/vmlinux
6553.00 1.9% __alloc_skb /lib/modules/2.6.38-rc5+/build/vmlinux
6205.00 1.8% udp_queue_rcv_skb /lib/modules/2.6.38-rc5+/build/vmlinux
6038.00 1.7% _raw_spin_lock /lib/modules/2.6.38-rc5+/build/vmlinux
5868.00 1.7% isc_rwlock_unlock /usr/lib64/libisc.so.62.0.1
5696.00 1.6% dns_rbt_findnode /usr/lib64/libdns.so.69.0.1
5647.00 1.6% read_tsc /lib/modules/2.6.38-rc5+/build/vmlinux
5633.00 1.6% getnstimeofday /lib/modules/2.6.38-rc5+/build/vmlinux
5448.00 1.6% kmem_cache_alloc_node_trace /lib/modules/2.6.38-rc5+/build/vmlinux
5272.00 1.5% finish_task_switch /lib/modules/2.6.38-rc5+/build/vmlinux
4719.00 1.4% sock_def_readable /lib/modules/2.6.38-rc5+/build/vmlinux
4002.00 1.2% is_swiotlb_buffer /lib/modules/2.6.38-rc5+/build/vmlinux
3914.00 1.1% memcpy /lib/modules/2.6.38-rc5+/build/vmlinux
3717.00 1.1% isc_stats_increment /usr/lib64/libisc.so.62.0.1
3706.00 1.1% __udp4_lib_rcv /lib/modules/2.6.38-rc5+/build/vmlinux
3653.00 1.1% ip_rcv /lib/modules/2.6.38-rc5+/build/vmlinux
3598.00 1.0% kmem_cache_alloc_node /lib/modules/2.6.38-rc5+/build/vmlinux
3407.00 1.0% ip_route_input_common /lib/modules/2.6.38-rc5+/build/vmlinux
2683.00 0.8% be_post_rx_frags /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
2666.00 0.8% __pthread_mutex_lock_internal /lib64/libpthread-2.12.so
2331.00 0.7% __phys_addr /lib/modules/2.6.38-rc5+/build/vmlinux
2230.00 0.6% __alloc_pages_nodemask /lib/modules/2.6.38-rc5+/build/vmlinux
2023.00 0.6% dns_name_fullcompare /usr/lib64/libdns.so.69.0.1
1972.00 0.6% packet_rcv /lib/modules/2.6.38-rc5+/build/vmlinux
1902.00 0.6% eth_type_trans /lib/modules/2.6.38-rc5+/build/vmlinux
1860.00 0.5% __pthread_mutex_unlock /lib64/libpthread-2.12.so
1804.00 0.5% fget_light /lib/modules/2.6.38-rc5+/build/vmlinux
1739.00 0.5% alloc_pages_current /lib/modules/2.6.38-rc5+/build/vmlinux
1736.00 0.5% dns_rbtnodechain_init /usr/lib64/libdns.so.69.0.1

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PerfTop: 29038 irqs/sec kernel:48.0% exact: 0.0% [1000Hz cpu-clock-msecs], (all, CPU: 11)
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samples pcnt function DSO
_______ _____ _____________________________ ___________________________________________________________

12833.00 7.5% intel_idle /lib/modules/2.6.38-rc5+/build/vmlinux
10771.00 6.3% isc_rwlock_lock /usr/lib64/libisc.so.62.0.1
8713.00 5.1% be_tx_compl_process /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
6452.00 3.8% kfree /lib/modules/2.6.38-rc5+/build/vmlinux
5935.00 3.5% skb_release_data /lib/modules/2.6.38-rc5+/build/vmlinux
5552.00 3.2% kmem_cache_free /lib/modules/2.6.38-rc5+/build/vmlinux
5292.00 3.1% isc_rwlock_unlock /usr/lib64/libisc.so.62.0.1
4893.00 2.9% dns_rbt_findnode /usr/lib64/libdns.so.69.0.1
4413.00 2.6% kfree_skb /lib/modules/2.6.38-rc5+/build/vmlinux
3802.00 2.2% be_poll_tx_mcc /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
3515.00 2.1% isc_stats_increment /usr/lib64/libisc.so.62.0.1
3016.00 1.8% _raw_spin_unlock_irqrestore /lib/modules/2.6.38-rc5+/build/vmlinux
2202.00 1.3% __do_softirq /lib/modules/2.6.38-rc5+/build/vmlinux
2027.00 1.2% _raw_spin_lock /lib/modules/2.6.38-rc5+/build/vmlinux
1935.00 1.1% finish_task_switch /lib/modules/2.6.38-rc5+/build/vmlinux
1906.00 1.1% __pthread_mutex_lock_internal /lib64/libpthread-2.12.so
1837.00 1.1% dns_name_fullcompare /usr/lib64/libdns.so.69.0.1
1702.00 1.0% dns_rbtnodechain_init /usr/lib64/libdns.so.69.0.1
1561.00 0.9% fget_light /lib/modules/2.6.38-rc5+/build/vmlinux
1559.00 0.9% dns_name_getlabelsequence /usr/lib64/libdns.so.69.0.1
1491.00 0.9% dns_name_equal /usr/lib64/libdns.so.69.0.1
1464.00 0.9% __pthread_mutex_unlock /lib64/libpthread-2.12.so
1454.00 0.9% dns_acl_match /usr/lib64/libdns.so.69.0.1
1293.00 0.8% dns_zone_attach /usr/lib64/libdns.so.69.0.1
1245.00 0.7% be_xmit /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
1159.00 0.7% dns_message_rendersection /usr/lib64/libdns.so.69.0.1
1115.00 0.7% isc___mempool_get /usr/lib64/libisc.so.62.0.1
1100.00 0.6% copy_user_generic_string /lib/modules/2.6.38-rc5+/build/vmlinux
1030.00 0.6% dns_name_fromwire /usr/lib64/libdns.so.69.0.1
1015.00 0.6% dns_name_hash /usr/lib64/libdns.so.69.0.1
1013.00 0.6% isc_radix_search /usr/lib64/libisc.so.62.0.1
970.00 0.6% __ip_route_output_key /lib/modules/2.6.38-rc5+/build/vmlinux
917.00 0.5% fput /lib/modules/2.6.38-rc5+/build/vmlinux
817.00 0.5% dev_queue_xmit /lib/modules/2.6.38-rc5+/build/vmlinux
812.00 0.5% sk_run_filter /lib/modules/2.6.38-rc5+/build/vmlinux
806.00 0.5% avc_has_perm_noaudit /lib/modules/2.6.38-rc5+/build/vmlinux
802.00 0.5% sock_wfree /lib/modules/2.6.38-rc5+/build/vmlinux
793.00 0.5% dns_name_towire /usr/lib64/libdns.so.69.0.1
754.00 0.4% sock_alloc_send_pskb /lib/modules/2.6.38-rc5+/build/vmlinux
752.00 0.4% dns_message_parse /usr/lib64/libdns.so.69.0.1
749.00 0.4% dns_rdata_towire /usr/lib64/libdns.so.69.0.1
728.00 0.4% dns_rdataset_init /usr/lib64/libdns.so.69.0.1
709.00 0.4% isc___mempool_put /usr/lib64/libisc.so.62.0.1
699.00 0.4% skb_release_head_state /lib/modules/2.6.38-rc5+/build/vmlinux
685.00 0.4% _raw_spin_lock_bh /lib/modules/2.6.38-rc5+/build/vmlinux
683.00 0.4% dns_name_concatenate /usr/lib64/libdns.so.69.0.1
678.00 0.4% __ip_append_data /lib/modules/2.6.38-rc5+/build/vmlinux
673.00 0.4% tick_nohz_stop_sched_tick /lib/modules/2.6.38-rc5+/build/vmlinux
662.00 0.4% sys_sendmsg /lib/modules/2.6.38-rc5+/build/vmlinux
654.00 0.4% dns_compress_findglobal /usr/lib64/libdns.so.69.0.1
654.00 0.4% memcpy /lib64/libc-2.12.so
637.00 0.4% dns_compress_invalidate /usr/lib64/libdns.so.69.0.1
597.00 0.3% isc__buffer_init /usr/lib64/libisc.so.62.0.1
595.00 0.3% dns_zone_detach /usr/lib64/libdns.so.69.0.1
WARNING: failed to keep up with mmap data.
WARNING: failed to keep up with mmap data.

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PerfTop: 29539 irqs/sec kernel:47.0% exact: 0.0% [1000Hz cpu-clock-msecs], (all, CPU: 11)
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samples pcnt function DSO
_______ _____ _____________________________ ___________________________________________________________

14478.00 7.5% intel_idle /lib/modules/2.6.38-rc5+/build/vmlinux
12279.00 6.3% isc_rwlock_lock /usr/lib64/libisc.so.62.0.1
9844.00 5.1% be_tx_compl_process /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
7368.00 3.8% kfree /lib/modules/2.6.38-rc5+/build/vmlinux
6696.00 3.5% skb_release_data /lib/modules/2.6.38-rc5+/build/vmlinux
6240.00 3.2% kmem_cache_free /lib/modules/2.6.38-rc5+/build/vmlinux
6034.00 3.1% isc_rwlock_unlock /usr/lib64/libisc.so.62.0.1
5547.00 2.9% dns_rbt_findnode /usr/lib64/libdns.so.69.0.1
5012.00 2.6% kfree_skb /lib/modules/2.6.38-rc5+/build/vmlinux
4290.00 2.2% be_poll_tx_mcc /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
4024.00 2.1% isc_stats_increment /usr/lib64/libisc.so.62.0.1
3417.00 1.8% _raw_spin_unlock_irqrestore /lib/modules/2.6.38-rc5+/build/vmlinux
2470.00 1.3% __do_softirq /lib/modules/2.6.38-rc5+/build/vmlinux
2312.00 1.2% _raw_spin_lock /lib/modules/2.6.38-rc5+/build/vmlinux
2138.00 1.1% finish_task_switch /lib/modules/2.6.38-rc5+/build/vmlinux
2136.00 1.1% __pthread_mutex_lock_internal /lib64/libpthread-2.12.so
2061.00 1.1% dns_name_fullcompare /usr/lib64/libdns.so.69.0.1
1961.00 1.0% dns_rbtnodechain_init /usr/lib64/libdns.so.69.0.1
1797.00 0.9% dns_name_getlabelsequence /usr/lib64/libdns.so.69.0.1
1743.00 0.9% fget_light /lib/modules/2.6.38-rc5+/build/vmlinux
1723.00 0.9% dns_name_equal /usr/lib64/libdns.so.69.0.1
1673.00 0.9% __pthread_mutex_unlock /lib64/libpthread-2.12.so
1671.00 0.9% dns_acl_match /usr/lib64/libdns.so.69.0.1
1488.00 0.8% dns_zone_attach /usr/lib64/libdns.so.69.0.1
1428.00 0.7% be_xmit /lib/modules/2.6.38-rc5+/kernel/drivers/net/benet/be2net.ko
1369.00 0.7% dns_message_rendersection /usr/lib64/libdns.so.69.0.1
1278.00 0.7% isc___mempool_get /usr/lib64/libisc.so.62.0.1
1251.00 0.6% copy_user_generic_string /lib/modules/2.6.38-rc5+/build/vmlinux
1193.00 0.6% dns_name_fromwire /usr/lib64/libdns.so.69.0.1
1182.00 0.6% isc_radix_search /usr/lib64/libisc.so.62.0.1