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store: Memoize 'built-in-builders' call directly in <store-connection>. 

The caching strategy introduced in
40cc850aeb was ineffective since we
regularly start from an empty object cache.  For example, "guix build
inkscape -n" would make 241 'built-in-builders' RPCs.

* guix/store.scm (<store-connection>)[built-in-builders]: New field.
(open-connection): Adjust '%make-store-connection' call accordingly.
(port->connection): Likewise.
(built-in-builders): Rename to...
(%built-in-builders):  ... this.
(built-in-builders): New procedure.
* guix/download.scm (built-in-builders*): Remove 'mcached' call.
This commit is contained in:
Ludovic Courtès 2019-04-16 10:26:46 +02:00
parent b744862704
commit 3961edf230
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GPG Key ID: 090B11993D9AEBB5
2 changed files with 34 additions and 23 deletions
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8
guix/download.scm
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@ -1,5 +1,5 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2013, 2014, 2015 Andreas Enge <andreas@enge.fr>
;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
;;; Copyright © 2016 Alex Griffin <a@ajgrf.com>
@ -415,11 +415,7 @@
(object->string %content-addressed-mirrors)))
(define built-in-builders*
(let ((proc (store-lift built-in-builders)))
(lambda ()
"Return, as a monadic value, the list of built-in builders supported by
the daemon; cache the return value."
(mcached (proc) built-in-builders))))
(store-lift built-in-builders))
(define* (built-in-download file-name url
#:key system hash-algo hash

49
guix/store.scm
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@ -368,7 +368,9 @@
(ats-cache store-connection-add-to-store-cache)
(atts-cache store-connection-add-text-to-store-cache)
(object-cache store-connection-object-cache
(default vlist-null))) ;vhash
(default vlist-null)) ;vhash
(built-in-builders store-connection-built-in-builders
(default (delay '())))) ;promise
(set-record-type-printer! <store-connection>
(lambda (obj port)
@ -557,13 +559,17 @@ for this connection will be pinned. Return a server object."
(write-int cpu-affinity port)))
(when (>= (protocol-minor v) 11)
(write-int (if reserve-space? 1 0) port))
(let ((conn (%make-store-connection port
(protocol-major v)
(protocol-minor v)
output flush
(make-hash-table 100)
(make-hash-table 100)
vlist-null)))
(letrec* ((built-in-builders
(delay (%built-in-builders conn)))
(conn
(%make-store-connection port
(protocol-major v)
(protocol-minor v)
output flush
(make-hash-table 100)
(make-hash-table 100)
vlist-null
built-in-builders)))
(let loop ((done? (process-stderr conn)))
(or done? (process-stderr conn)))
conn)))))))))
@ -578,13 +584,17 @@ already taken place on PORT and that we're just continuing on this established
connection. Use with care."
(let-values (((output flush)
(buffering-output-port port (make-bytevector 8192))))
(%make-store-connection port
(protocol-major version)
(protocol-minor version)
output flush
(make-hash-table 100)
(make-hash-table 100)
vlist-null)))
(define connection
(%make-store-connection port
(protocol-major version)
(protocol-minor version)
output flush
(make-hash-table 100)
(make-hash-table 100)
vlist-null
(delay (%built-in-builders connection))))
connection))
(define (store-connection-version store)
"Return the protocol version of STORE as an integer."
@ -1371,13 +1381,13 @@ that there is no guarantee that the order of the resulting list matches the
order of PATHS."
substitutable-path-list))
(define built-in-builders
(define %built-in-builders
(let ((builders (operation (built-in-builders)
"Return the built-in builders."
string-list)))
(lambda (store)
"Return the names of the supported built-in derivation builders
supported by STORE."
supported by STORE. The result is memoized for STORE."
;; Check whether STORE's version supports this RPC and built-in
;; derivation builders in general, which appeared in Guix > 0.11.0.
;; Return the empty list if it doesn't. Note that this RPC does not
@ -1388,6 +1398,11 @@ supported by STORE."
(builders store)
'()))))
(define (built-in-builders store)
"Return the names of the supported built-in derivation builders
supported by STORE."
(force (store-connection-built-in-builders store)))
(define-operation (optimize-store)
"Optimize the store by hard-linking identical files (\"deduplication\".)
Return #t on success."