cvs commit: src/sys/dev/netif/xl if_xl.c

[Sepherosa Ziehau <sephe@xxxxxxxxxxxxxxxxxxxxxxx>]

sephe       2005/09/24 22:33:32 PDT

DragonFly src repository

  Modified files:
    sys/dev/netif/xl     if_xl.c 
  Log:
  - in xl_attach(), print xl card type ("90X"/"90XB"), if verbose booting is
    enabled
  - in xl_start() and xl_start_90xB(), do BUS_DMASYNC_PREWRITE after *all* of
    the CPU memory updating is finished
  - use UpPoll feature for XL_TYPE_905B typed card.  this can eliminate device
    register accessing during xl_rxeof() thus improving recv performance(*) with
    less CPU overhead
    Inspired-by: FreeBSD pci/if_xl.c rev1.58's commit log
  
  (*)
  benchmark setting:
  1) sephe:xl0 (dev-1.3.6 Sep.24) <----> sephe-test:vr0 (dev-1.3.6 Sep.24)
  2) except for the different xl driver, rest part of the kernel running on
     sephe is same
  3) xl0 is a <3Com 3c905C-TX Fast Etherlink XL> card, XL_TYPE_905B typed
  4) netperf is executed with only "-H <host> -p <port> -t <test type>"
  
  benchmark result:
  1) run netperf from sephe-test:vr0
     17.0% (41.30[new xl]/35.28[old xl]) performance boost is observed for
     "TCP STREAM TEST"
  2) run netperf from sephe:xl0
     13.6% (7405.79[new xl]/6518.39[old xl]) performance boost is observed for
     "TCP REQUEST/RESPONSE TEST"
  3) minor performance boosts are observed in the rest of netperf "TEST"s
  
  # Thank Bill Paul for that detailed commit log
  
  Revision  Changes    Path
  1.33      +38 -31    src/sys/dev/netif/xl/if_xl.c


http://www.dragonflybsd.org/cvsweb/src/sys/dev/netif/xl/if_xl.c.diff?r1=1.32&r2=1.33&f=u