Re: [Reproducible-builds] Raspi 3 suitable for arm64?
On Sun, Mar 06, 2016 at 08:34:23AM -0800, Vagrant Cascadian wrote:
> Cc'ed correct debian-arm address...
>
> On 2016-03-06, Holger Levsen wrote:
> > On Sonntag, 6. März 2016, Axel Beckert wrote:
> >> I now wonder if a bunch of Raspberry Pi 3 -- since they have 64-bit
> >> CPUs (IIRC an Allwinner A53T) -- would make us able to check
> >> reproducible-builds for Debian arm64, too.
>
> I got the impression it was another broadcom chip, maybe with a
> cortex-a53? Gotta love ARM's confusing namespace.
>
Cortex A53, Broadcom video etc.
>
> > as far as I know, yes. Though I would want to use some other arm64 boards as
> > well, to have hardware variety right from the start. for example:
> > http://www.heise.de/newsticker/meldung/RasPi-Angreifer-Odroid-C2-Schneller-
> > etwas-teurer-aber-ohne-WLAN-3123182.html also has an arm64 cpu, but twice
> > as much ram (2gb) as the raspi3 and 2 ghz cores instead of 1.2 ghz ones on the
> > raspi3. *buntu also has a new arm64 developer/reference board. There will be
> > more in 3 months too.
Server boards still hard to find. Pretty much nothing has good SATA support.
RPi 3 doesn't have the firmware currently to play aarch64 so is being used
as a 32 bit processor.
>
> I've definitely been thinking about some of these new arm64 capable
> boards. The Odroid-C2, Pine64 and LeMaker HiKey have 2GB RAM options, at
> least. I do worry a bit about sufficient mainline support, as a few of
> the boards I've tried (odroid-c1+, cubieboard4) didnt really work out
> with vendor kernels and the mainline support wasn't close enough to be
> useable.
Lemaker Hikey - see Vince Sanders on this at planet.debian.org.
>
> That said, I'm not sure how much CPU/board diversity has really resulted
> in reproducibility issues at this point, so getting a less diverse
> network set up might be fine.
>
> Also of note, the arm64 boards *could* be used to test arm64, armhf or
> armel. So they're certainly more flexible. I've considered getting a
> small number of the arm64 capable boards and plugging them into the
> armhf network with the idea that they could be switched over to arm64 in
> the future.
Absolutely :)
>
>
> > I think we'd need 10-12 of such boards for a start, not sure if we still have
> > Debian funds to buy those (but I almost think so… Vagrant?) -
>
> I need to do a final tally yet, but it's nearly done. There might be
> some funding left for a few boards, but probably not 10 boards once you
> factor in the costs of SSDs, power supplies, and other necessary
> adapters.
>
> We've certainly met the target of tripling the build network speed, at
> least!
>
> https://tests.reproducible-builds.org/stats_builds_per_day_armhf.png
>
>
> > providing we would find someone interested+able to host these. Would
> > you (Axel) be able too?
>
> One thing is it uses a considerable amount of bandwidth monthly. The 16
> boards we had running last month consumed about 500GB of upload
> bandwidth for the last two months. Most of that was upload bandwidth,
> since a caching proxy minimizes the impact of downloads (~90GB
> downloaded on the proxy).
>
> Power consumption is, of course, relatively low... even with 18 boards
> and some infrastructure, it uses under 150 watts.
>
>
> live well,
> vagrant
All the best,
AndyC
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