From: Efraim Flashner <efraim@flashner.co.il>
To: guix-devel@gnu.org
Subject: Re: parallelizing more actions
Date: Sun, 12 Nov 2017 15:31:49 +0200 [thread overview]
Message-ID: <20171112133149.GI1815@macbook41> (raw)
In-Reply-To: <20171109090559.GF1815@macbook41>
[-- Attachment #1: Type: text/plain, Size: 1087 bytes --]
On Thu, Nov 09, 2017 at 11:05:59AM +0200, Efraim Flashner wrote:
> While rebuilding glibc-final on aarch64 I realized that the 'strip phase
> took 235 seconds. The relevant code for 'strip from gnu-build-system is
> in guix/build/gnu-build-system.scm, starting at line 340, with the
> actual stripping starting at 398. When I changed 'for-each' to
> 'par-for-each' the time dropped from 235 seconds to 215, about an 8.5%
> savings. I'm pretty sure most of that time was spent failing to strip
> certain files, but it is still a savings.
>
These numbers were for glibc@2.26. I ran it against glibc@2.25 on my
x86_64 machine with a spinning harddrive and 2 cores, without the patch
it took 165.7 seconds (164.6 the second time), with the patch it dropped
to 24.3 seconds.
I'll test it with glibc@2.25 on aarch64 later when its not building
other things.
--
Efraim Flashner <efraim@flashner.co.il> אפרים פלשנר
GPG key = A28B F40C 3E55 1372 662D 14F7 41AA E7DC CA3D 8351
Confidentiality cannot be guaranteed on emails sent or received unencrypted
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
next prev parent reply other threads:[~2017-11-12 13:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-09 9:05 parallelizing more actions Efraim Flashner
2017-11-11 1:42 ` Chris Marusich
2017-11-11 11:25 ` Ludovic Courtès
2017-11-11 16:49 ` Efraim Flashner
2017-11-12 13:31 ` Efraim Flashner [this message]
2017-11-13 18:55 ` Efraim Flashner
2017-11-16 10:06 ` Ludovic Courtès
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://guix.gnu.org/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20171112133149.GI1815@macbook41 \
--to=efraim@flashner.co.il \
--cc=guix-devel@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/guix.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).