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    SubjectRe: [RFC PATCH RT] rwsem: The return of multi-reader PI rwsems
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    On Wed, 2014-04-09 at 15:19 -0400, Steven Rostedt wrote:

    > If you have any benchmark on large machines I would be very happy if
    > you could test this patch against the unpatched version of -rt.

    Too bad I don't have (and know how to use) specjbb.

    I dug up old vmark, thinking I'd be able to get some halfway useful
    relative numbers from it, but that was a waste of a day. The thing
    performs so badly on 40 core box that rt _beats_ nopreempt, and after 2
    nodes, you're going backward. 40 Westmere EX cores does a whopping ~2.5
    * dinky old Q6600 box throughput.

    -Mike



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