lkml.org 
[lkml]   [2009]   [May]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH 2.6.30-rc4] r8169: avoid losing MSI interrupts
    Hi!

    Michael Buesch wrote:

    > Thanks a lot, Dave! This fixes the issue on my chip.

    Yep, it's stable here as well. And even a little faster than pci=nomsi.
    The only strangeness I observed is that the throughput (measured with
    iperf and a single TCP connection) varies:

    [ ID] Interval Transfer Bandwidth
    [ 3] 0.0-10.0 sec 667 MBytes 559 Mbits/sec
    [ 3] 10.0-20.0 sec 803 MBytes 673 Mbits/sec
    [ 3] 20.0-30.0 sec 802 MBytes 673 Mbits/sec
    [ 3] 30.0-40.0 sec 714 MBytes 599 Mbits/sec
    [ 3] 40.0-50.0 sec 669 MBytes 561 Mbits/sec
    [ 3] 50.0-60.0 sec 791 MBytes 663 Mbits/sec
    [ 3] 0.0-60.0 sec 4.34 GBytes 622 Mbits/sec

    In gkrellm, you can see that it actually alternates between two values.

    With pci=nomsi (and without the patch) I get lower but more consistent
    results:

    [ ID] Interval Transfer Bandwidth
    [ 3] 0.0-10.0 sec 511 MBytes 429 Mbits/sec
    [ 3] 10.0-20.0 sec 465 MBytes 390 Mbits/sec
    [ 3] 20.0-30.0 sec 481 MBytes 404 Mbits/sec
    [ 3] 30.0-40.0 sec 466 MBytes 391 Mbits/sec
    [ 3] 40.0-50.0 sec 465 MBytes 390 Mbits/sec
    [ 3] 50.0-60.0 sec 463 MBytes 389 Mbits/sec
    [ 3] 0.0-60.0 sec 2.78 GBytes 399 Mbits/sec

    I suppose it's a side effect of the MSI acknowledgement loop. But who am
    I to complain about higher average throughput? ;-)

    > You can add my:
    >
    > Tested-by: Michael Buesch <mb@bu3sch.de>

    Tested-by: Michael Riepe <michael.riepe@googlemail.com>

    --
    Michael "Tired" Riepe <michael.riepe@googlemail.com>
    X-Tired: Each morning I get up I die a little


    \
     
     \ /
      Last update: 2009-05-23 16:39    [W:0.022 / U:32.820 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site