RFC net and/or udp optimisations
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- v1 RFC Latest27 patches 2 repliesIn review
Patches in v1 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/27 | sock: deduplicate ->sk_wmem_alloc checknet/ | +2 | 0 replies | |
| 2/27 | sock: optimise sock_def_write_space send refcountingnet/ | +14 | 0 replies | |
| 3/27 | sock: optimise sock_def_write_space barriersnet/ | +25 | 0 replies | |
| 4/27 | skbuff: drop zero check from skb_zcopy_setinclude/ net/ net/ | +5 | 0 replies | |
| 5/27 | skbuff: drop null check from skb_zcopyinclude/ net/ net/ +3 more | +18 | 0 replies | |
| 6/27 | net: xen: set zc flags only when there is ubufdrivers/ | +2 | 0 replies | |
| 7/27 | skbuff: introduce skb_is_zcopy()include/ net/ | +22 | 0 replies | |
| 8/27 | skbuff: optimise alloc_skb_with_frags()include/ net/ | +48 | 0 replies | |
| 9/27 | net: inline sock_alloc_send_skbinclude/ net/ | +8 | 0 replies | |
| 10/27 | net: inline part of skb_csum_hwoffload_helpinclude/ net/ | +14 | 0 replies | |
| 11/27 | net: inline skb_zerocopy_iter_dgraminclude/ net/ net/ +1 more | +22 | 0 replies | |
| 12/27 | ipv6: inline ip6_local_out()include/ net/ | +12 | 0 replies | |
| 13/27 | ipv6: help __ip6_finish_output() inliningnet/ | +0 | 0 replies | |
| 14/27 | ipv6: refactor ip6_finish_output2()net/ | +13 | 0 replies | |
| 15/27 | net: inline dev_queue_xmit()include/ net/ | +14 | 0 replies | |
| 16/27 | ipv6: partially inline fl6_update_dst()include/ net/ | +18 | 0 replies | |
| 17/27 | tcp: optimise skb_zerocopy_iter_stream()net/ | +1 | 0 replies | |
| 18/27 | net: optimise ipcm6 cookie initinclude/ net/ net/ +3 more | +5 | 0 replies | |
| 19/27 | udp/ipv6: refactor udpv6_sendmsg udplite checksnet/ | +3 | 0 replies | |
| 20/27 | udp/ipv6: move pending section of udpv6_sendmsgnet/ | +40 | 0 replies | |
| 21/27 | udp/ipv6: prioritise the ip6 path over ip4 checksnet/ | +17 | 0 replies | |
| 22/27 | udp/ipv6: optimise udpv6_sendmsg() daddr checksnet/ | +11 | 0 replies | |
| 23/27 | udp/ipv6: optimise out daddr reassignmentnet/ | +0 | 0 replies | |
| 24/27 | udp/ipv6: clean up udpv6_sendmsg's saddr initnet/ | +4 | 0 replies | |
| 25/27 | ipv6: refactor opts push in __ip6_make_skb()net/ | +8 | 0 replies | |
| 26/27 | ipv6: improve opt-less __ip6_make_skb()net/ | +3 | 0 replies | |
| 27/27 | ipv6: clean up ip6_setup_corknet/ | +13 | 0 replies |
Reviews trailers per patch
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Cover letter [RFC net-next 00/27] net and/or udp optimisations
A mix of various net optimisations, which were mostly discovered during UDP testing. Benchmarked with an io_uring test using 16B UDP/IPv6 over dummy netdev:
2090K vs 2229K tx/s, +6.6%, or in a 4-8% range if not averaging across reboots.
1-3 removes extra atomics and barriers from sock_wfree() mainly benefitting UDP. 4-7 cleans up some zerocopy helpers
8-16 do inlining of ipv6 and generic net pathes
17 is a small nice performance improvement for TCP zerocopy
18-27 refactors UDP to shed some more overhead
Pavel Begunkov (27):
sock: deduplicate ->sk_wmem_alloc check
sock: optimise sock_def_write_space send refcounting
sock: optimise sock_def_write_space barriers
skbuff: drop zero check from skb_zcopy_set
skbuff: drop null check from skb_zcopy
net: xen: set zc flags only when there is ubuf
skbuff: introduce skb_is_zcopy()
skbuff: optimise alloc_skb_with_frags()
net: inline sock_alloc_send_skb
net: inline part of skb_csum_hwoffload_help
net: inline skb_zerocopy_iter_dgram
ipv6: inline ip6_local_out()
ipv6: help __ip6_finish_output() inlining
ipv6: refactor ip6_finish_output2()
net: inline dev_queue_xmit()
ipv6: partially inline fl6_update_dst()
tcp: optimise skb_zerocopy_iter_stream()
net: optimise ipcm6 cookie init
udp/ipv6: refactor udpv6_sendmsg udplite checks udp/ipv6: move pending section of udpv6_sendmsg udp/ipv6: prioritise the ip6 path over ip4 checks udp/ipv6: optimise udpv6_sendmsg() daddr checks udp/ipv6: optimise out daddr reassignment udp/ipv6: clean up udpv6_sendmsg's saddr init
ipv6: refactor opts push in __ip6_make_skb()
ipv6: improve opt-less __ip6_make_skb()
ipv6: clean up ip6_setup_cork
drivers/net/xen-netback/interface.c | 3 +- include/linux/netdevice.h | 27 ++++- include/linux/skbuff.h | 102 +++++++++++++----- include/net/ipv6.h | 37 ++++--- include/net/sock.h | 10 +- net/core/datagram.c | 2 - net/core/datagram.h | 15 --- net/core/dev.c | 28 ++--- net/core/skbuff.c | 59 ++++------- net/core/sock.c | 50 +++++++-- net/ipv4/ip_output.c | 10 +- net/ipv4/tcp.c | 5 +- net/ipv6/datagram.c | 4 +- net/ipv6/exthdrs.c | 15 ++- net/ipv6/ip6_output.c | 88 ++++++++-------- net/ipv6/output_core.c | 12 --- net/ipv6/raw.c | 8 +- net/ipv6/udp.c | 158 +++++++++++++--------------- net/l2tp/l2tp_ip6.c | 8 +- 19 files changed, 339 insertions(+), 302 deletions(-) delete mode 100644 net/core/datagram.h
Signature · 1 line
2.35.1