From: ludo@gnu.org (Ludovic Courtès)
To: Thomas Danckaert <thomas.danckaert@gmail.com>
Cc: guix-devel@gnu.org
Subject: Graft slowness fixed
Date: Mon, 16 Jan 2017 22:18:55 +0100 [thread overview]
Message-ID: <87tw8y66v4.fsf@gnu.org> (raw)
In-Reply-To: <1484159585-12289-1-git-send-email-thomas.danckaert@gmail.com> (Thomas Danckaert's message of "Wed, 11 Jan 2017 19:33:01 +0100")
Hi Thomas,
Thomas Danckaert <thomas.danckaert@gmail.com> skribis:
> There is one issue: when I apply this patch series on current master (after
> commit e10872c gnu: gpgme: Patch CMake files), `guix build kdevelop` seems to
> get stuck after completing the build (at least it doesn't return after running
> at ~100%cpu for over 40minutes, with no output). When I apply the patch
> series on commit 4d0a3d8 (system: grub: Load relevant EFI modules on EFI
> systems), I don't have this problem. I'm not sure if this is an issue just on
> my system, or not (I upgraded guix-daemon to lastest master, but the problem
> remains). Hints on how to investigate this are welcome!
You found a terrrrrible issue that somehow went unnoticed for two weeks!
This cute commit:
http://git.savannah.gnu.org/cgit/guix.git/commit/?id=d38bc9a9f6feefc465964531520fee5663a12f48
had the effect of disabling caching in the DAG traversal performed by
‘graft-derivation’. For big DAGs like that of kdevelop, you could
really feel it. :-)
This is fixed by this one-liner:
http://git.savannah.gnu.org/cgit/guix.git/commit/?id=90ad5c8836138b7fd4d1bd0243dfa8b30ae0cf21
This other one fixes a related issue that had always been there apparently:
http://git.savannah.gnu.org/cgit/guix.git/commit/?id=0aeed5e310504a9ef2cf6a2b2a7e76086eb8c2fc
Thanks for the heads-up!
Ludo’.
prev parent reply other threads:[~2017-01-16 21:19 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-11 18:33 [PATCH 0/4] kdevelop updates Thomas Danckaert
2017-01-11 18:33 ` [PATCH 1/4] gnu: kdevelop: Update to 5.0.3 Thomas Danckaert
2017-01-16 20:07 ` Ludovic Courtès
2017-01-11 18:33 ` [PATCH 2/4] gnu: kdevelop: Set more paths in wrapper script Thomas Danckaert
2017-01-16 20:09 ` Ludovic Courtès
2017-01-11 18:33 ` [PATCH 3/4] gnu: Add kdev-python Thomas Danckaert
2017-01-16 21:10 ` Ludovic Courtès
2017-01-16 22:39 ` Danny Milosavljevic
2017-01-19 17:14 ` Thomas Danckaert
2017-01-20 13:36 ` Ludovic Courtès
2017-01-11 18:33 ` [PATCH 4/4] gnu: Add python-autopep8 Thomas Danckaert
2017-01-16 21:14 ` Ludovic Courtès
2017-01-16 21:18 ` Ludovic Courtès [this message]
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