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    SubjectRe: 2.6.24-rc8-rt1: Strange latencies on mpc5200 powerpc - RCU issue?
    Steven Rostedt wrote:
    > On Tue, 1 Jul 2008, Wolfgang Grandegger wrote:
    >> I continue this thread because it's still not understood why enabling
    >> CONFIG_RCU_TRACE is necessary to get reasonable latencies on the
    >> MPC5200. It might also explain, why I get much worse latencies with
    >> 2.6.25.8-rt7.
    >
    > Have you tried turning on ftrace?

    Hm, is it available for PowerPC? I have not found yet how to enable it.

    Wolfgang.


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