From: Maxime Devos <maximedevos@telenet.be>
To: Ricardo Wurmus <rekado@elephly.net>, 52001@debbugs.gnu.org
Subject: bug#52001: numpy CPU dispatch probably prevents builds of python-numpy from being reproducible
Date: Sat, 20 Nov 2021 16:26:47 +0000 [thread overview]
Message-ID: <ae41e8c06e2433cf8484bff5a5eb5b39d577e6a2.camel@telenet.be> (raw)
In-Reply-To: <87y25ihm3e.fsf@elephly.net>
Ricardo Wurmus schreef op za 20-11-2021 om 15:36 [+0000]:
> Numpy accelerates operations with native code. Early in the build
> it probes the CPU / compiler for supported instruction extensions
> and then proceeds to build extensions for different features. I’m
> guessing that this won’t work when building on older CPUs, so the
> results of two builds on different CPUs may differ.
>
> It would be helpful if someone could confirm this by building
> numpy on an older CPU and then compare the build result with that
> provided by ci.guix.gnu.org.
>
I built it locally, and have the same result as ci.guix.gnu.org.
However, the bordeaux substitute is different:
$ LANGUAGE=en guix challenge python-numpy
/gnu/store/k311v0843hgq5frcbscylwimqssl1h54-python-numpy-1.17.3
contents differ:
local hash: 07var0wn8fywxchldz5pjqpnlavrlbc8s81aqwsqyi0i7qlh6ka7
https://ci.guix.gnu.org/nar/lzip/k311v0843hgq5frcbscylwimqssl1h54-python-numpy-1.17.3
: 07var0wn8fywxchldz5pjqpnlavrlbc8s81aqwsqyi0i7qlh6ka7
https://bordeaux.guix.gnu.org/nar/lzip/k311v0843hgq5frcbscylwimqssl1h54-python-numpy-1.17.3
: 0cbl3q19bshb6ddz8xkcrjzkcmillsqii4z852ybzixyp7rg40qa
bordeaux.guix.gnu.org 3.9MiB 6.7MiB/s
00:01 [##################] 100.0%
1 store items were analyzed:
- 0 (0.0%) were identical
- 1 (100.0%) differed
- 0 (0.0%) were inconclusive
Diffoscope output:
bordeaux.guix.gnu.org 3.9MiB 4.2MiB/s 00:01 [##################] 100.0%
[...]
│ │ │ │ │ │ │ │ --- /tmp/guix-directory.6ivbVt/lib/python3.8/site-packages/numpy/distutils/fcompiler/__pycache__/vast.cpython-38.pyc
│ │ │ │ │ │ │ ├── +++ /gnu/store/k311v0843hgq5frcbscylwimqssl1h54-python-numpy-1.17.3/lib/python3.8/site-packages/numpy/distutils/fcompiler/__pycache__/vast.cpython-38.pyc
│ │ │ │ │ │ │ │ @@ -106,15 +106,15 @@
│ │ │ │ │ │ │ │ 00000690: 0104 0106 0104 0104 0106 0104 f906 0904 ................
│ │ │ │ │ │ │ │ 000006a0: 0104 0208 0308 06da 085f 5f6d 6169 6e5f .........__main_
│ │ │ │ │ │ │ │ 000006b0: 5f29 01da 036c 6f67 e902 0000 0029 01da _)...log.....)..
│ │ │ │ │ │ │ │ 000006c0: 1463 7573 746f 6d69 7a65 645f 6663 6f6d .customized_fcom
│ │ │ │ │ │ │ │ 000006d0: 7069 6c65 7272 0700 0000 2901 da08 636f pilerr....)...co
│ │ │ │ │ │ │ │ 000006e0: 6d70 696c 6572 2911 da0a 5f5f 6675 7475 mpiler)...__futu
│ │ │ │ │ │ │ │ 000006f0: 7265 5f5f 7202 0000 0072 0300 0000 7204 re__r....r....r.
│ │ │ │ │ │ │ │ -00000700: 0000 0072 1900 0000 da1d 6e75 6d70 792e ...r......numpy.
│ │ │ │ │ │ │ │ +00000700: 0000 0072 1900 0000 5a1d 6e75 6d70 792e ...r....Z.numpy.
│ │ │ │ │ │ │ │ 00000710: 6469 7374 7574 696c 732e 6663 6f6d 7069 distutils.fcompi
│ │ │ │ │ │ │ │ 00000720: 6c65 722e 676e 7572 0500 0000 da09 636f ler.gnur......co
│ │ │ │ │ │ │ │ 00000730: 6d70 696c 6572 7372 0600 0000 7227 0000 mpilersr....r'..
│ │ │ │ │ │ │ │ 00000740: 00da 0964 6973 7475 7469 6c73 7233 0000 ...distutilsr3..
│ │ │ │ │ │ │ │ 00000750: 00da 0d73 6574 5f76 6572 626f 7369 7479 ...set_verbosity
│ │ │ │ │ │ │ │ 00000760: da0f 6e75 6d70 792e 6469 7374 7574 696c ..numpy.distutil
│ │ │ │ │ │ │ │ 00000770: 7372 3500 0000 da05 7072 696e 7472 2000 sr5.....printr .
1 bit is different.
Greetings,
Maxime.
next prev parent reply other threads:[~2021-11-20 16:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-20 15:36 bug#52001: numpy CPU dispatch probably prevents builds of python-numpy from being reproducible Ricardo Wurmus
2021-11-20 16:26 ` Maxime Devos [this message]
2021-12-10 22:42 ` Ludovic Courtès
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