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    SubjectRe: 2.6.27-rc8-git7: Reported regressions from 2.6.26
    Date
    Rafael J. Wysocki <rjw@sisk.pl> wrote:
    >> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=11308
    >> > Subject : tbench regression on each kernel release from 2.6.22 -&gt; 2.6.28
    >> > Submitter : Christoph Lameter <cl@linux-foundation.org>
    >> > Date : 2008-08-11 18:36 (55 days old)
    >> > References : http://marc.info/?l=linux-kernel&m=121847986119495&w=4
    >> > http://marc.info/?l=linux-kernel&m=122125737421332&w=4
    >>
    >> Just for the reference, this one regresses from the 2.6.23.
    >
    > Still, tbench results from 2.6.26 are better than from 2.6.27-rc.
    > That's why it's still on the list, but if you think that's not relevant, please
    > let me know and I'll drop it.

    Note that 2.6.27 beats 2.6.26 by 30% with bulk traffic over
    loopback as opposed to the small packets sent by tbench where
    I saw a 5% drop in performance on my machine.

    So I'm not sure whether this should really be classified as
    a regression if we limit ourselves to the changes between 26
    and 27.

    The changes prior to 26 seem to be more significant.

    Chyeers,
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