Re: How long does it take to run the full rustc bootstrap chain?

[Ludovic Courtès]

Hi Félix,

Félix Baylac Jacqué <felix@alternativebit.fr> skribis:

> I'd be curious to know how long it takes to run the full rustc bootstrap
> chain on the Guix build farm. I'm sadly not sure how to approach this
> problem.

I believe Efraim, Maxim, and probably a few other people have first-hand
experience building the whole chain.  Any estimate, people?

> Is there a way to extract this information from Cuirass or the Guix data
> service?

Maybe not from the Guix Data Service, but most likely from Cuirass and
the Guix Build Coordinator.

For example, <https://ci.guix.gnu.org/build/1505621/details> shows the
duration, which could can also get with:

  wget -qO- https://ci.guix.gnu.org/build/1505621 |jq

(The (guix ci) module needs an update to let you do access that info
right from Scheme.)

Now the /search interface doesn’t have a JSON equivalent, but you can
find the build ID using something along these lines:

--8<---------------cut here---------------start------------->8---
scheme@(guile-user)> ,use(guix ci)
scheme@(guile-user)> (latest-evaluations "https://ci.guix.gnu.org"; 10 #:spec 
"master")
$14 = (#<<evaluation> id: 739193 spec: "master" complete?: #t checkouts: 
(#<<checkout> commit: "4716cea6256523a8ecf90a426d675bfb7620f3e4" channel: 
"guix">)> #<<evaluation> id: 738364 spec: "master" complete?: #t checkouts: 
(#<<checkout> commit: "16d4ded6302c0650978203d0df83614896c453e8" channel: 
"guix">)> #<<evaluation> id: 737995 spec: "master" complete?: #t checkouts: 
(#<<checkout> commit: "e61660c78f1190c578dd6f202bc5529cbdcff84e" channel: 
"guix">)> #<<evaluation> id: 737588 spec: "master" complete?: #t checkouts: 
(#<<checkout> commit: "88746cd80bc56212ae7922c0fa1cd9a18e44c3bb" channel: 
"guix">)> #<<evaluation> id: 737529 spec: "master" complete?: #t checkouts: 
(#<<checkout> commit: "ac553ba68e535810085dd838e48e4fa6ac553e67" channel: 
"guix">)> #<<evaluation> id: 736841 spec: "master" complete?: #t checkouts: 
(#<<checkout> commit: "7ecd85eacbfa5b7379f563b83807d3e5258cf700" channel: 
"guix">)> #<<evaluation> id: 734789 spec: "master" complete?: #t checkouts: 
(#<<checkout> commit: "3bb145b6e2a8c84e7739ead9ae76dc4d42bb9850" channel: 
"guix">)> #<<evaluation> id: 734747 spec: "master" complete?: #t checkouts: 
(#<<checkout> commit: "033cbd11a837dbc7602799f15d691221653e1996" channel: 
"guix">)> #<<evaluation> id: 734733 spec: "master" complete?: #t checkouts: 
(#<<checkout> commit: "c9eac0c3553703385c997a70741348ae5d34dc68" channel: 
"guix">)> #<<evaluation> id: 734718 spec: "master" complete?: #t checkouts: 
(#<<checkout> commit: "2589997fab07bcebe6d87fd227852389ab5b1962" channel: 
"guix">)>)
scheme@(guile-user)> (define jobs (evaluation-jobs "https://ci.guix.gnu.org"; 
(evaluation-id (car $14))))
scheme@(guile-user)> (length jobs)
$15 = 76649
scheme@(guile-user)> (car jobs)
$16 = #<<job> build-id: 1627000 status: scheduled name: "0ad.aarch64-linux">
scheme@(guile-user)> ,use(srfi srfi-1)
scheme@(guile-user)> (find (lambda (job) (string=? "rust.x86_64-linux" 
(job-name job))) jobs)
$17 = #<<job> build-id: 1275492 status: succeeded name: "rust.x86_64-linux">
scheme@(guile-user)> (job-build "https://ci.guix.gnu.org"; $17)
$18 = #<<build> id: 1275492 derivation: 
"/gnu/store/dmzhvql66a1n31j2xpygfxpw576wpkwb-rust-1.60.0.drv" evaluation: 
579940 system: "x86_64-linux" status: succeeded timestamp: 1662284654 
start-time: #<date nanosecond: 0 second: 14 minute: 44 hour: 11 day: 4 month: 9 
year: 2022 zone-offset: 7200> stop-time: #<date nanosecond: 0 second: 14 
minute: 44 hour: 11 day: 4 month: 9 year: 2022 zone-offset: 7200> products: ()>
--8<---------------cut here---------------end--------------->8---

That still doesn’t answer your question, because you’re interested in
the build time of the full Rust bootstrap chain, but that’s a start!

HTH,
Ludo’.