Messages in this thread | | | Date | Thu, 5 Jan 2006 13:43:29 -0500 | From | Daniel Jacobowitz <> | Subject | Re: [patch 00/2] improve .text size on gcc 4.0 and newer compilers |
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On Thu, Jan 05, 2006 at 07:09:36PM +0100, Arjan van de Ven wrote: > > > There are tools already around to do this sort of thing as well - > > "profile directed optimization" or whatever they called it. Seems to be > > fairly commonly done with userspace, but not with the kernel. I'm not > > sure why not ... possibly because it's not available for gcc ? > > gcc has this for sure > the problem is that it expects the profile info in a special format > that.. gets written to a file. So to do it in the kernel you need > SomeMagic(tm), for example to use the kernel profiler but to let it > output it somehow in a gcc compatible format.
Right - at some point I remember a discussion of nifty Eclipse plugins to allow test runs on a custom workload and rebuild with feedback, but it never materialized.
-- Daniel Jacobowitz CodeSourcery - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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