Re: 3com 3c905c-txm

From: Andrew Morton (andrewm@uow.edu.au)
Date: Fri May 12 2000 - 11:33:58 EDT

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    Donald Becker wrote:
    >
    > [ big snip. I'll follow up on linux-vortex ]
    >
    > 4000 PCI cycles is a *very* long time. Ages. It should only 0 to 2 PCI
    > cycles to queue a packet.

    Alas I seem to have lost the ability to reproduce[*].

    With four Linux boxes on a 10bT LAN the limit of 2,000 was exceeded a
    few times a minute with a particular test case. With my current setup
    of three Linux boxes and one NT, the best I can get is 240 loops, in the
    DownStall in boomerang_start_xmit(). 3c905B. Still much higher than
    we expect.

    More tomorrow.... 

    -- 
-akpm-

    [*] The timeout problem, that is.

    -
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