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    SubjectRe: [PATCH 11/32] nohz/cpuset: Don't turn off the tick if rcu needs it
    On Tue, 27 Mar 2012, Steven Rostedt wrote:

    > On Tue, 2012-03-27 at 11:13 -0500, Christoph Lameter wrote:
    > > Please do not use "realtime" since I am not sure what you mean by that.
    > > Its for a low latency applications that cannot use "realtime" because that
    > > implies high latencies.
    > This statement totally confuses me, as the whole point of the -rt
    > (realtime) patch, is for lower latencies. Where do you get "realtime"
    > implies high latencies from?

    Obviously compiling a kernel with preemptiong introduces additional
    overhead to guarantee more deterministic behavior. Additional overhead
    increases latencies generated by the OS in general. Compile a kernel
    without preemption and it will run faster and thus have lower latencies.

    Realtime avoids high latency spikes but in general increases average OS

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