RE: FXP driver....

From: Danial Thom (danial_thom_at_yahoo.com)
Date: 08/21/05

  • Next message: Danial Thom: "Re: polling decreases throughput ~50%" 
    Date: Sun, 21 Aug 2005 05:29:04 -0700 (PDT)
To: Daniel Gonzalez <spammesilly@gmail.com>, freebsd-questions@freebsd.org

    Thats the sort of thing that happens when
    interrupts aren't working.

    Danial

    --- Ted Mittelstaedt <tedm@toybox.placo.com>
    wrote:

    > what about a ping from the 845G to the labbox,
    > does that do
    > the same thing?
    >
    > Ted
    >
    > >-----Original Message-----
    > >From: owner-freebsd-questions@freebsd.org
    > >[mailto:owner-freebsd-questions@freebsd.org]On
    > Behalf Of Daniel Gonzalez
    > >Sent: Friday, August 19, 2005 11:12 AM
    > >To: freebsd-questions@freebsd.org
    > >Subject: FXP driver....
    > >
    > >
    > >>
    > >> Hi,
    > >>
    > >> I've build a new P4 box (1.8Ghz, 512MB mem)
    > based upon a ASUS P4B533VM
    > >> motherboard. This board has an Intel 845G
    > chipset and onboard 10/100
    > >> mbit/s LAN (fxp driver).
    > >>
    > >> When connected directly to a gateway (in my
    > case an Extreme BD10k) I
    > >> observe the following behaviour: a ping to
    > the gateway starts around
    > >> 1ms and slowly increases in steps of .1 or
    > .2ms to around 10ms. Then
    > >> it suddenly drops back to 1ms and the
    > process starts all over again.
    > >>
    > >> I've tried a different NIC (3com, xl
    > driver), new cabling, new
    > >> switchport and all gives me the same result.
    > My other labbox (a AMD
    > >> 2000 XP+ with 3com PCI nic) connected to the
    > same router is showing
    > >> normal latency. This gives me the feeling
    > it's some sort of timing
    > >> issue on the P4's motherboard itself.
    > >>
    > >> Has anyone seen this before? I've searched
    > the archives and found
    > >> little on this topic. Any tips/hints where I
    > can seach for further
    > >> clues?
    > >>
    > >> Thanks,
    > >>
    > >> Arjan
    > >>
    > >
    > >I haven't used the fxp driver in a while but
    > you can check out
    > >the man page
    > >for the driver (man 4 fxp) and it mentions
    > that you can disable
    > >autoselect
    > >for media type and speed. I remember reading
    > in an article (I
    > >can't locate
    > >the URL) that the autonegotiation between the
    > NIC and
    > >switch/router can be a
    > >bottleneck. That would be the easiset thing to
    > check/eliminate.
    > >Hope that
    > >helps.
    > >--
    > >Dan Gonzalez
    > >spammesilly@gmail.com
    > >IM: signulth
    >
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