Re: Julia packages on build farms?

[Efraim Flashner]

On Wed, Jul 06, 2022 at 01:25:59PM +0200, zimoun wrote:
> Hi,
> 
> I am confused by the missing Julia substitutes on Berlin (ci.guix).  And
> I miss why the are missing – another topic; what recently changed on
> master that could trigger this rebuild?
> 
> That’s said, I do not understand the result of “guix weather” and “guix
> build”.  Let pick an example.  Using Guix 06493e7, the package
> julia-staticarrays is unavailable on Berlin (ci.guix) and available on
> Bordeaux (bordeaux.guix).  So far, so good!
> 
> --8<---------------cut here---------------start------------->8---
> $ guix weather julia-staticarrays
> computing 1 package derivations for x86_64-linux...
> looking for 1 store items on https://ci.guix.gnu.org...
> https://ci.guix.gnu.org
>   0.0% substitutes available (0 out of 1)
>   unknown substitute sizes
>   0,0 MiB on disk (uncompressed)
> 
>   0.0% (0 out of 1) of the missing items are queued
>   at least 1 000 queued builds
>       x86_64-linux: 374 (37.4%)
>       i686-linux: 341 (34.1%)
>       powerpc64le-linux: 260 (26.0%)
>       aarch64-linux: 25 (2.5%)
>   build rate: 128.06 builds per hour
>       x86_64-linux: 59.81 builds per hour
>       i686-linux: 55.88 builds per hour
>       powerpc64le-linux: 13.49 builds per hour
>       aarch64-linux: 42.47 builds per hour
> looking for 1 store items on https://bordeaux.guix.gnu.org...
> https://bordeaux.guix.gnu.org
>   100.0% substitutes available (1 out of 1)
>   0,5 MiB of nars (compressed)
>   4,7 MiB on disk (uncompressed)
>   (continuous integration information unavailable)
> --8<---------------cut here---------------end--------------->8---
> 
> Now, I get:
> 
> --8<---------------cut here---------------start------------->8---
> $ guix build julia-staticarrays --substitute-urls=https://ci.guix.gnu.org -n
> The following derivation would be built:
>   /gnu/store/cinn2zy26791mp4d3qv2gda635a5a2r3-julia-staticarrays-1.2.13.drv
> 
> $ guix build julia-staticarrays 
> --substitute-urls=https://bordeaux.guix.gnu.org -n
> The following derivation would be built:
>   /gnu/store/cinn2zy26791mp4d3qv2gda635a5a2r3-julia-staticarrays-1.2.13.drv
> --8<---------------cut here---------------end--------------->8---
> 
> where the former is expected, not the latter.  Why is the package
> locally built when “guix weather” says the substitutes is available?
> 
> What am I doing wrong?

I added a patch to tbb on 4 July to add support for riscv64 (and maybe
other architectures) and that caused a rebuild of julia. I have since
rebuilt all the julia packages locally. I did find that sometimes while
building all the packages in one go some of them failed and needed to be
restarted. After 2 rounds all the packages (guix package -A ^julia-)
built without any issues on x86_64.

Checking ci.guix.gnu.org it looks like none have failed, but they
haven't all started to be built yet.

-- 
Efraim Flashner   <efraim@flashner.co.il>   אפרים פלשנר
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