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    SubjectRe: [RFC/PATCH] Make powerpc64 use __thread for per-cpu variables
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    From: Olof Johansson <olof@lixom.net>
    Date: Wed, 10 May 2006 00:16:50 -0500

    > It would be interesting to see benchmarks of how much it improves
    > things. I guess it doesn't really get interesting until after the paca
    > gets removed though, due to the added mfsprg's.

    When I moved the per-cpu base into a fixed register on sparc64,
    it definitely showed up on the micro-benchmarks because this
    shrunk the .text a lot in that case.
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