git: ethernet: If caller thread cpu is fixed, pass cpuid to ether_input_pkt()

[Sepherosa Ziehau]

commit ff37a3565eba5b54853bbc55b4cbe08fb9511b90
Author: Sepherosa Ziehau <sephe at dragonflybsd.org>
Date:   Sun Mar 9 19:28:18 2014 +0800

    ethernet: If caller thread cpu is fixed, pass cpuid to ether_input_pkt()
    
    So we could use optimized lwkt_sendmsg_oncpu() instead of lwkt_sendmsg(),
    if the target netisr is on the same cpu as caller thread cpu.  Mainly to
    avoid unnecessary wakeup() IPIs to other cpus.
    
    THE RESULT:
    
    On i7-3770 w/ HT enabled (8 logical cpus); NIC is 82599ES w/ 8 RX rings
    and 8 TX rings.  Run:
        repeat 10 tcp_stream -H ... -i 256 -l 10 -r
    (256 netperf TCP_MAERTS instances for 10 seconds, 10 rounds)
    
    Total amount of cross IPIs before this commit is 6946097.  Total amount
    of cross IPIs as of this commit is 5445324.  ~22% unnecessary wakeup()
    IPIs are avoided!

Summary of changes:
 sys/dev/netif/bce/if_bce.c |  3 ++-
 sys/dev/netif/bnx/if_bnx.c |  4 ++--
 sys/dev/netif/emx/if_emx.c |  4 ++--
 sys/dev/netif/igb/if_igb.c |  4 ++--
 sys/dev/netif/ix/if_ix.c   |  4 ++--
 sys/dev/netif/jme/if_jme.c | 26 +++++++++++++-------------
 sys/net/if_ethersubr.c     | 31 +++++++++++++++++++++++--------
 sys/net/if_var.h           |  3 ++-
 8 files changed, 48 insertions(+), 31 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/ff37a3565eba5b54853bbc55b4cbe08fb9511b90


-- 
DragonFly BSD source repository