Messages in this thread | | | Subject | Re: [RFT][patch 17/18] sched: use jump labels to reduce overhead when bandwidth control is inactive | From | Peter Zijlstra <> | Date | Fri, 05 Aug 2011 17:14:14 +0200 |
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On Fri, 2011-08-05 at 08:11 -0700, Richard Henderson wrote: > On 08/05/2011 01:30 AM, Peter Zijlstra wrote: > > OK, so _WHY_ does that make a difference and will a next version of > > gnu-binutils not mess that up? > > The Why is micro-architectual, and I can't answer that. > > But ld will never re-order the files as given on the command-line. > There are too many functions and tables that are constructed > piece-wise from input sections; re-ordering them would change > the semantics of the program.
Right, so I was wondering about things like whole-program-optimization passes at link time. Since I've no clue why the proposed patch does what it does, its hard to say what invariant is needed to be kept.
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