GNU logs - #49919, boring messages


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From: Sarah Morgensen <iskarian@HIDDEN>
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Hello Guix,

These patches give the Go build system the standard parallelism levers. I would
have thought that Go was already detecting the correct number for GOMAXPROCS,
but after I made this same change for the bootstrapping Go compiler, Efraim
found that it cut the build time nearly in half [0].

[0] https://issues.guix.gnu.org/49616

--
Sarah Morgensen (2):
  build-system/go: Honor #:parallel-build?.
  build-system/go: Honor #:parallel-tests?.

 guix/build-system/go.scm       |  5 +++++
 guix/build/go-build-system.scm | 12 ++++++++++--
 2 files changed, 15 insertions(+), 2 deletions(-)


base-commit: 693d75e859150601145b7f7303f61d4f48e76927
-- 
2.31.1





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From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Sarah Morgensen <iskarian@HIDDEN>
Subject: bug#49919: Acknowledgement ([PATCH core-updates 0/2]
 build-system/go: Enable parallelism.)
Message-ID: <handler.49919.B.162831157414358.ack <at> debbugs.gnu.org>
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Reply-To: 49919 <at> debbugs.gnu.org
Date: Sat, 07 Aug 2021 04:47:01 +0000

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49919: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D49919
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guix/build/go-build-system.scm (build): Honor #:parallel-build?.
guix/build-system/go.scm (go-build): Add PARALLEL-BUILD? parameter.
[builder]: Use it.
---
 guix/build-system/go.scm       | 3 +++
 guix/build/go-build-system.scm | 7 ++++++-
 2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/guix/build-system/go.scm b/guix/build-system/go.scm
index 100d1db4b6..a5aa21b99e 100644
--- a/guix/build-system/go.scm
+++ b/guix/build-system/go.scm
@@ -3,6 +3,7 @@
 ;;; Copyright © 2017 Leo Famulari <leo@HIDDEN>
 ;;; Copyright © 2020 Jakub Kądziołka <kuba@HIDDEN>
 ;;; Copyright © 2021 Ludovic Courtès <ludo@HIDDEN>
+;;; Copyright © 2021 Sarah Morgensen <iskarian@HIDDEN>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -129,6 +130,7 @@ commit hash and its date rather than a proper release tag."
                    (unpack-path "")
                    (build-flags ''())
                    (tests? #t)
+                   (parallel-build? #t)
                    (allow-go-reference? #f)
                    (system (%current-system))
                    (guile #f)
@@ -153,6 +155,7 @@ commit hash and its date rather than a proper release tag."
                     #:unpack-path #$unpack-path
                     #:build-flags #$build-flags
                     #:tests? #$tests?
+                    #:parallel-build? #$parallel-build?
                     #:allow-go-reference? #$allow-go-reference?
                     #:inputs #$(input-tuples->gexp inputs)))))
 
diff --git a/guix/build/go-build-system.scm b/guix/build/go-build-system.scm
index 227df820db..521bad9667 100644
--- a/guix/build/go-build-system.scm
+++ b/guix/build/go-build-system.scm
@@ -5,6 +5,7 @@
 ;;; Copyright © 2020 Jack Hill <jackhill@HIDDEN>
 ;;; Copyright © 2020 Jakub Kądziołka <kuba@HIDDEN>
 ;;; Copyright © 2020 Efraim Flashner <efraim@HIDDEN>
+;;; Copyright © 2021 Sarah Morgensen <iskarian@HIDDEN>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -216,8 +217,12 @@ unpacking."
                 (_ #f))
               inputs))))
 
-(define* (build #:key import-path build-flags #:allow-other-keys)
+(define* (build #:key import-path build-flags (parallel-build? #t)
+                #:allow-other-keys)
   "Build the package named by IMPORT-PATH."
+  (let* ((njobs (if parallel-build? (parallel-job-count) 1)))
+    (setenv "GOMAXPROCS" (number->string njobs)))
+
   (with-throw-handler
     #t
     (lambda _
-- 
2.31.1





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guix/build/go-build-system.scm (build): Honor #:parallel-tests?.
guix/build-system/go.scm (go-build): Add PARALLEL-TESTS? parameter.
[builder]: Use it.
---
 guix/build-system/go.scm       | 2 ++
 guix/build/go-build-system.scm | 5 ++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/guix/build-system/go.scm b/guix/build-system/go.scm
index a5aa21b99e..7b66163779 100644
--- a/guix/build-system/go.scm
+++ b/guix/build-system/go.scm
@@ -131,6 +131,7 @@ commit hash and its date rather than a proper release tag."
                    (build-flags ''())
                    (tests? #t)
                    (parallel-build? #t)
+                   (parallel-tests? #t)
                    (allow-go-reference? #f)
                    (system (%current-system))
                    (guile #f)
@@ -156,6 +157,7 @@ commit hash and its date rather than a proper release tag."
                     #:build-flags #$build-flags
                     #:tests? #$tests?
                     #:parallel-build? #$parallel-build?
+                    #:parallel-tests? #$parallel-tests?
                     #:allow-go-reference? #$allow-go-reference?
                     #:inputs #$(input-tuples->gexp inputs)))))
 
diff --git a/guix/build/go-build-system.scm b/guix/build/go-build-system.scm
index 521bad9667..0ad580a484 100644
--- a/guix/build/go-build-system.scm
+++ b/guix/build/go-build-system.scm
@@ -239,9 +239,12 @@ unpacking."
       (invoke "go" "env"))))
 
 ;; Can this also install commands???
-(define* (check #:key tests? import-path #:allow-other-keys)
+(define* (check #:key tests? import-path (parallel-tests? #t)
+                #:allow-other-keys)
   "Run the tests for the package named by IMPORT-PATH."
   (when tests?
+    (let* ((njobs (if parallel-tests? (parallel-job-count) 1)))
+      (setenv "GOMAXPROCS" (number->string njobs)))
     (invoke "go" "test" import-path))
   #t)
 
-- 
2.31.1





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Hello Sarah,

> These patches give the Go build system the standard parallelism levers. I would
> have thought that Go was already detecting the correct number for GOMAXPROCS,
> but after I made this same change for the bootstrapping Go compiler, Efraim
> found that it cut the build time nearly in half [0].

This looks good, but I'd rather have Cuirass fixed before pushing this
series so that we can evaluate the impact on all Go packages and
potentially find some regressions.

Thanks,

Mathieu





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