unofficial mirror of help-guix@gnu.org 
 help / color / mirror / Atom feed
From: Vincent Legoll <vincent.legoll@gmail.com>
To: help-guix <help-guix@gnu.org>
Subject: guix pull parallelism
Date: Fri, 12 Aug 2016 16:31:58 +0200	[thread overview]
Message-ID: <CAEwRq=q1y3C+_nTPBvCFjMpbto48tvr2eq2jKJWTKq1TmFZSNw@mail.gmail.com> (raw)

Hello,

it does look like some parts of "guix pull" are parallelized
as I was seeing guix-daemon's child guile take 200% CPU during :

loading...     23.5% of 511 filesrandom seed for tests: 1471011793
loading...     99.8% of 511 files
compiling...     99.6% of 511 files

So far so good, nice to use those cores that would stay idle.

But...

$ grep -c ^processor /proc/cpuinfo
3

So why is that not a ~300% is there only parallelism for 2 threads,
or is it an unintended side effect and there is no parallelism ?

If it had been ~100% or ~300% I would not have asked, but that
200% looks wrong one (missed a core) way or the other (no
parallelism)...

Thanks for feeding my curiosity...

-- 
Vincent Legoll

             reply	other threads:[~2016-08-12 14:32 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-08-12 14:31 Vincent Legoll [this message]
2016-08-13 11:11 ` guix pull parallelism Vincent Legoll

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='CAEwRq=q1y3C+_nTPBvCFjMpbto48tvr2eq2jKJWTKq1TmFZSNw@mail.gmail.com' \
    --to=vincent.legoll@gmail.com \
    --cc=help-guix@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. 
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).