[PATCH 3/3] ARM: shmobile: defconfig: Do not enable CONFIG_CPU_BPREDICT_DISABLE
horms at verge.net.au
Sun Jan 17 17:48:36 PST 2016
On Mon, Jan 11, 2016 at 07:41:14PM +0100, Geert Uytterhoeven wrote:
> Do not disable branch prediction, as this has a big performance impact.
> After re-enabling branch prediction, __loop_delay() runs 16 (Cortex A15)
> or 11 (Cortex A9) times faster than before.
> Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
> This used to be enabled in:
> - ag5evm_defconfig (sh73a0)
> - ape6evm_defconfig (r8a73a4)
> - armadillo800eva_defconfig (r8a7740)
> - koelsch_defconfig (r8a7791)
> - kota2_defconfig (sh73a0)
> Was there ever a good reason for that?
If that was a concious decision then I believe it was made before my time.
I'm going ahead and queuing up this change for v4.6.
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