Re: Tuning Gigabit

From: Martin Nilsson (martin_at_mullet.se)
Date: 06/30/03

  • Next message: Eric Anderson: "Re: Tuning Gigabit" 
    Date: Mon, 30 Jun 2003 07:00:05 +0200
To: David Gilbert <dgilbert@velocet.ca>

    David Gilbert wrote:
    > Well... I don't have any disk controllers to test, but I've verified
    > this behaviour with em, bge, sk, and nge chipsets. Of these, as I've
    > said before, the em shines.

    I have made some simple speed testing of gigabit NICs too. My results
    are that Linux 2.4.18+ is usually faster and have much lower CPU load
    than FreeBSD 4.8. I have tested the following NIC:s em (1000/XT,Anvik),
    nge(32/33), bge (Altima 1002), ti (Netgear GA620T).
    For FreeBSD I've found that use nothing beats the ti with its special
    firmware.

    > The bge has good performance, too ... but
    > we've seen a lot of corrupted routed packets ... it has some
    > interaction with some motherboard chipsets.

    The VIA chipsets often have very poor PCI bus performance if you don't
    load the 4 in 1 drivers (windows only). The max PCI speed I've been able
    to get with (semi old ~1.5years) VIA chipsets are about 70MB/s measured
    with a SCSI disk array on a 32/33 bus. The intel, SiS and serverworks
    chipsets perform as expected, I haven't tested any Nvida boards.

    > It's in the back of my mind. I don't think I'll have time for this
    > BSDCon, but maybe soon thereafter. It's getting to the point where we
    > should have a BSD Journal.

    I would be interested in helping to test this, I have a bunch of lab
    boxes with 64/66PCI or PCI-X slots and NICs to work with. I'm able to
    get access to most new motherboards and chipsets to test chipset
    specific performance. What I need is someone to help me develop useful
    things to test, validate results and to check testing methodology.

            /Martin 

    -- 
Martin Nilsson M.Sc CS&E, CTO Mullet Scandinavia AB, Malmö, SWEDEN
E-mail: martin@mullet.se, Phone: +46-(0)708-606170, Web: www.mullet.se
Our business is well enigineered servers optimised for FreeBSD & Linux
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  • Next message: Eric Anderson: "Re: Tuning Gigabit"

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