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    SubjectRe: 2.5.36-mm1 dbench 512 profiles
    On Fri, 20 Sep 2002 05:48:38 +0530, William Lee Irwin III wrote:

    > Hanna Linder wrote:
    >>> Looks like fastwalk might not behave so well on this 32 cpu numa
    >>> system...
    > On Thu, Sep 19, 2002 at 04:38:14PM -0700, Andrew Morton wrote:
    >> I've rather lost the plot. Have any of the dcache speedup patches been
    >> merged into 2.5?
    > As far as the dcache goes, I'll stick to observing and reporting. I'll
    > rerun with dcache patches applied, though.
    > Thanks,
    > Bill
    > -

    For a 32-way system fastwalk will perform badly from dcache_lock point of
    view, basically due to increased lock hold time. dcache_rcu-12 should reduce
    dcache_lock contention and hold time. The patch uses RCU infrastructer patch and
    read_barrier_depends patch. The patches are available in Read-Copy-Update
    section on lse site at


    Maneesh Soni
    IBM Linux Technology Center,
    IBM India Software Lab, Bangalore.
    Phone: +91-80-5044999 email:
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