Messages in this thread | ![/](/images/icornerl.gif) | | Date | Thu, 6 Apr 2006 15:10:03 +0200 | From | Paolo Ornati <> | Subject | Re: add new code section for kernel code |
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On Thu, 6 Apr 2006 15:45:47 +0300 "saeed bishara" <saeed.bishara@gmail.com> wrote:
> I'm developing linux kernel for ARM cpu with direct-mapped > instruction cache, sometimes I notice that the pefromance of the > kernel (for some test) is highly dependent on the code layout, in > order to fix that I added new code section, and for each kernel > function that highly invokerd I added compiler attribute so it will > allocated in that section (exactly as the __init section)
It's already done in 2.6.17-rc1 for x86_64:
Processor type and feature --> Function reordering
arch/x86_64/Kconfig:
config REORDER bool "Function reordering" default n help This option enables the toolchain to reorder functions for a more optimal TLB usage. If you have pretty much any version of binutils, this can increase your kernel build time by roughly one minute.
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4bdc3b7f1b730c07f5a6ccca77ee68e044036ffc
-- Paolo Ornati Linux 2.6.16.1 on x86_64 - 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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