git: tcp: Let sosendtcp() call tcp_usrreq.pru_send asynchronous
commit 0ad8e15ea0059b225c9aa255b844cb9ec48d5227
Author: Sepherosa Ziehau <sephe@dragonflybsd.org>
Date: Sun Oct 23 20:55:16 2011 +0800
tcp: Let sosendtcp() call tcp_usrreq.pru_send asynchronous
- Embed netmsg_pru_send into mbuf.m_hdr, which shares the space with
netmsg_pru_packet.
- Use the newly added netmsg_pru_send in mbuf to perform asynchronous
pru_send. For asynchronous pru_send, PRUS_NOREPLY is added, which
prevents pru_send to reply the message.
- In sosendtcp(), if we have more data to call pru_send, we call it
asynchronously. The last piece of data or OOB data will still be
passed to pru_send synchronously.
On Phenom 9550 (4 core, 2.2GHz):
8 parallel netperf -H 127.0.0.1 (4 runs, unit: Mbps)
old 5863.85 5773.13 5534.14 5506.72
new 6735.98 6903.13 6971.89 7056.66
This give ~20% performance improvement.
It has no obvious impact on 1000BaseT or 100baseTX network performace.
Summary of changes:
sys/kern/uipc_msg.c | 18 ++++++++++++++++++
sys/kern/uipc_socket.c | 10 +++++++++-
sys/net/netmsg.h | 1 +
sys/netinet/tcp_usrreq.c | 12 ++++++++----
sys/sys/mbuf.h | 7 ++++++-
sys/sys/socketops.h | 3 +++
6 files changed, 45 insertions(+), 6 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/0ad8e15ea0059b225c9aa255b844cb9ec48d5227
--
DragonFly BSD source repository