netdev - [PATCH v3 net-next 0/4] tcp: better smp listener behavior

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Message-Id: <1444358004-26483-1-git-send-email-edumazet@google.com>
Date:	Thu,  8 Oct 2015 19:33:20 -0700
From:	Eric Dumazet <edumazet@...gle.com>
To:	"David S . Miller" <davem@...emloft.net>
Cc:	netdev <netdev@...r.kernel.org>,
	Eric Dumazet <edumazet@...gle.com>,
	Eric Dumazet <eric.dumazet@...il.com>
Subject: [PATCH v3 net-next 0/4] tcp: better smp listener behavior

As promised in last patch series, we implement a better SO_REUSEPORT
strategy, based on cpu affinities if selected by the application.

We also moved sk_refcnt out of the cache line containing the lookup
keys, as it was considerably slowing down smp operations because
of false sharing. This was simpler than converting listen sockets
to conventional RCU (to avoid sk_refcnt dirtying)

Could process 6.0 Mpps SYN instead of 4.2 Mpps on my test server.

Eric Dumazet (4):
  net: SO_INCOMING_CPU setsockopt() support
  net: align sk_refcnt on 128 bytes boundary
  net: shrink struct sock and request_sock by 8 bytes
  tcp: shrink tcp_timewait_sock by 8 bytes

 include/linux/tcp.h              |  4 ++--
 include/net/inet_timewait_sock.h |  2 +-
 include/net/request_sock.h       |  7 +++----
 include/net/sock.h               | 41 +++++++++++++++++++++++++++-------------
 net/core/sock.c                  |  5 +++++
 net/ipv4/inet_hashtables.c       |  2 ++
 net/ipv4/syncookies.c            |  4 ++--
 net/ipv4/tcp_input.c             |  2 +-
 net/ipv4/tcp_ipv4.c              |  2 +-
 net/ipv4/tcp_minisocks.c         | 18 +++++++++---------
 net/ipv4/tcp_output.c            |  2 +-
 net/ipv4/udp.c                   |  6 +++++-
 net/ipv6/inet6_hashtables.c      |  2 ++
 net/ipv6/syncookies.c            |  4 ++--
 net/ipv6/tcp_ipv6.c              |  2 +-
 net/ipv6/udp.c                   | 11 +++++++----
 16 files changed, 72 insertions(+), 42 deletions(-)

-- 
2.6.0.rc2.230.g3dd15c0

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