Re: Which kernel flavor for big.Little systems?
On Wed, May 07, 2014 at 05:56:28PM +0100, David Goodenough wrote:
> Well thank you for clearing up my mis-understanding about the big in
> big.Little. Being all 32 bit obviously makes life easier, in that all
> the apps will be armhf, which should mean it fits into the current
> Debian family without real change (other than the kernel).
>
> It will be interesting to see what kernel bits AllWinner release with
> the A80 and what then gets merged into the mainline kernel. Although
> I suppose I should not hold my breath for that as the AllWinner kernel
> shipped with the Cubieboard2 is only single processor, it does not even
> make use of SMP.
If I boot a recent Linus git tree kernel on an armdale-octa, I get 1 CPU.
If I boot a linaro-tracking kernel I get all 4 A15's booted (the 4 A7s
still fail to boot). So it seems the big.LITTLE cpus are still not
quite fully supported, at least not the one I tried so far but the work
is in progress. Android kernels seem to have support for running the
A15s or the A7s but not both at once at this time (switching based on
need), but I haven't tried those kernels since I have no interest in
running android on this board.
The arndale-octa uses the Samsung Exynos 5420 in case you didn't know
that. :)
--
Len Sorensen
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