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hydra: Invalidate derivation caches after each architecture evaluation.

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This reduces max RSS from 1.3G to 1.0G.

* guix/derivations.scm (invalidate-derivation-caches!): New procedure.
* build-aux/hydra/gnu-system.scm (hydra-jobs): Use it.  Add 'format'
call.
This commit is contained in:
Ludovic Courtès 2017-12-13 15:01:07 +01:00
parent d1f01e4845
commit 34797d8afc
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7
build-aux/hydra/gnu-system.scm
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@ -334,6 +334,13 @@ valid."
(parameterize ((%graft? #f))
;; Return one job for each package, except bootstrap packages.
(append-map (lambda (system)
(format (current-error-port)
"evaluating for '~a' (heap size: ~a MiB)...~%"
system
(round
(/ (assoc-ref (gc-stats) 'heap-size)
(expt 2. 20))))
(invalidate-derivation-caches!)
(case subset
((all)
;; Build everything, including replacements.

10
guix/derivations.scm
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@ -90,6 +90,7 @@
derivation-path->output-paths
derivation
raw-derivation
invalidate-derivation-caches!
map-derivation
@ -841,6 +842,15 @@ output should not be used."
(hash-set! %derivation-cache file drv*)
drv*)))
(define (invalidate-derivation-caches!)
"Invalidate internal derivation caches. This is mostly useful for
long-running processes that know what they're doing. Use with care!"
;; Typically this is meant to be used by Cuirass and Hydra, which can clear
;; caches when they start evaluating packages for another architecture.
(invalidate-memoization! derivation->bytevector)
(invalidate-memoization! derivation-path->base16-hash)
(hash-clear! %derivation-cache))
(define* (map-derivation store drv mapping
#:key (system (%current-system)))
"Given MAPPING, a list of pairs of derivations, return a derivation based on