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From: Maxim Cournoyer <maxim.cournoyer@gmail.com>
To: Mark H Weaver <mhw@netris.org>
Cc: Guix Devel <guix-devel@gnu.org>, Mathieu Othacehe <othacehe@gnu.org>
Subject: Re: wip-ungrafting builds stuck
Date: Tue, 20 Apr 2021 22:47:29 -0400	[thread overview]
Message-ID: <87fszke4la.fsf@gmail.com> (raw)
In-Reply-To: <871rb7tw24.fsf@netris.org> (Mark H. Weaver's message of "Sun, 18 Apr 2021 12:07:52 -0400")

Hi,

Mark H Weaver <mhw@netris.org> writes:

> Mathieu Othacehe <othacehe@gnu.org> writes:
>
>>> Any idea what could be wrong, Mathieu?  What would you suggest to do
>>> when investigating such issues?
>>
>> Yes I noticed it. The main problem here is that almost all workers are
>> stuck building Rust.
>>
>> I see two actions here:
>>
>> 1. Understand why Rust is taking so long to build.
>
> The attached patch, which I've been using on my private branch of Guix
> for a long time and is fully tested, would significantly speed up the
> Rust bootstrap.  I never submitted it because I wasn't sure it would be
> of interest.
>
>        Mark

FWIW, the tests are already disabled on core-updates, which reduced the
build time by 33%.  Also we now bootstrap from 1.29 there instead of
1.19.  The net result is a 50% faster bootstrap (8 hours) compared to
master (16 hours) on a 3900X Ryzen processor.  That's still a lot of
time.  I hope that the effort to produce a GCC front end for Rust
succeeds [0].  Otherwise mrustc, which we already use to bootstrap rust,
is now able to bootstrap from 1.39 (unreleased yet though), so we should
look into making use of it [1].

Maxim

[0]  https://github.com/Rust-GCC/gccrs
[1]  https://github.com/thepowersgang/mrustc/


  reply	other threads:[~2021-04-21  2:47 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-18 10:02 wip-ungrafting builds stuck Ludovic Courtès
2021-04-18 10:13 ` Mathieu Othacehe
2021-04-18 10:14 ` Mathieu Othacehe
2021-04-18 16:07   ` Mark H Weaver
2021-04-21  2:47     ` Maxim Cournoyer [this message]
2021-04-21 20:47 ` Why is glib still grafted on the 'wip-ungrafting' branch? (was Re: wip-ungrafting builds stuck) Mark H Weaver
2021-04-21 22:26   ` Leo Famulari
2021-04-22 16:27     ` Mark H Weaver
2021-04-22 18:10       ` Leo Famulari
2021-04-30 16:32 ` wip-ungrafting builds stuck Ludovic Courtès
2021-04-30 17:18   ` Leo Famulari

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