From: Thomas Schwinge <thomas@schwinge.name>
To: Diego Novillo <dnovillo@google.com>, Ian Lance Taylor <iant@google.com>
Cc: gcc-patches@gcc.gnu.org, gcc@gcc.gnu.org
Subject: Re: PATCH RFA: Build stages 2 and 3 with C++
Date: Sun, 04 Sep 2011 17:20:00 -0000 [thread overview]
Message-ID: <87ty8srzrw.fsf@kepler.schwinge.homeip.net> (raw)
In-Reply-To: <CAD_=9DTLP_ENRaapfVzeLUPGh-Mr6=65XotQug=7fpanR2rmiw@mail.gmail.com>
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Hi!
On Sat, 16 Jul 2011 11:27:46 -0400, Diego Novillo <dnovillo@google.com> wrote:
> On Sat, Jul 16, 2011 at 02:52, Ian Lance Taylor <iant@google.com> wrote:
>
> > 2011-07-15 Ian Lance Taylor <iant@google.com>
> >
> > * configure.ac: Add --enable-build-poststage1-with-cxx. If set,
> > make C++ a boot_language. Set and substitute
> > POSTSTAGE1_CONFIGURE_FLAGS.
> > * Makefile.tpl (POSTSTAGE1_CONFIGURE_FLAGS): New variable.
> > (STAGE[+id+]_CONFIGURE_FLAGS): Add $(POSTSTAGE1_CONFIGURE_FLAGS).
> > * configure, Makefile.in: Rebuild.
>
> I agree with this change. For reference, have you measured the
> difference in bootstrap time? Clearly, it will be slower, but how
> much?
I can provide some data from my GNU/Hurd regression and comparing to
GNU/Linux testing.
This is GCC Git master branch, going from
7c9f953a01d23c6b6885dc908d5b1dba8009efd4 (2011-07-18; ``before'') to
18540031a8b2070a56f5b7e94d6b24e8bd335c57 (2011-07-20; ``after''); which
is shortly before and after the switch to using g++. For GNU/Hurd, I
have applied a few patches that are minor to this experiment.
kepler is a Xen domU on a AMD Athlon II X2 215 with 2700 MHz, the domU
has 1 GiB of RAM, and is running Debian GNU/Linux testing x86.
coulomb is a AMD Athlon XP with 1466 MHz, has 1 GiB of RAM, and is
running Debian GNU/Hurd unstable x86.
kepler coulomb
before 2 h 35 min 10 h 50 min
after 3 h 00 min 13 h 00 min
The ``after'' data is averaged from two iterations only, ``before'' data
has seen many more iterations, and has (roughly) been constant over a
long period of time. Both systems have been idle apart from the GCC
build. The build was essentially a native ``configure && make''.
So, yes, bootstrap is slower now. The bootstrap time now is 16 % to 20 %
longer, roughly.
Grüße,
Thomas
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next prev parent reply other threads:[~2011-09-04 17:20 UTC|newest]
Thread overview: 53+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-07-16 6:56 Ian Lance Taylor
2011-07-16 7:05 ` Andrew Pinski
2011-07-16 7:48 ` Ian Lance Taylor
2011-07-16 7:59 ` Basile Starynkevitch
2011-07-17 3:17 ` Ian Lance Taylor
2011-07-16 16:11 ` Diego Novillo
2011-07-16 22:58 ` Ian Lance Taylor
2011-07-17 10:36 ` Richard Guenther
2011-07-17 12:21 ` Eric Botcazou
2011-07-17 16:55 ` Richard Guenther
2011-07-17 17:55 ` Markus Trippelsdorf
2011-07-17 22:37 ` Markus Trippelsdorf
2011-09-04 17:20 ` Thomas Schwinge [this message]
2011-07-16 20:40 ` Toon Moene
2011-07-19 21:33 ` Ian Lance Taylor
2011-07-19 22:24 ` Gabriel Dos Reis
2011-07-20 0:46 ` H.J. Lu
2011-07-20 1:15 ` H.J. Lu
2011-07-20 6:28 ` David Edelsohn
2011-07-20 9:34 ` Jonathan Wakely
2011-07-20 11:02 ` Jonathan Wakely
2011-07-20 12:41 ` David Edelsohn
2011-07-20 12:48 ` Richard Guenther
2011-07-20 14:07 ` Diego Novillo
2011-07-20 14:34 ` Ian Lance Taylor
2011-07-20 15:35 ` Jonathan Wakely
2011-07-20 15:06 ` Toon Moene
2011-07-20 15:23 ` Ian Lance Taylor
2011-07-20 15:53 ` David Edelsohn
2011-07-20 15:55 ` Ian Lance Taylor
2011-07-20 20:05 ` David Edelsohn
2011-07-20 20:53 ` Ian Lance Taylor
2011-07-20 21:06 ` Mike Stump
2011-07-21 0:10 ` Ian Lance Taylor
2011-07-21 9:40 ` Basile Starynkevitch
2011-07-21 16:06 ` Ian Lance Taylor
2011-07-21 17:44 ` Jakub Jelinek
2011-07-21 19:40 ` Ian Lance Taylor
2011-07-21 20:12 ` Basile Starynkevitch
2011-07-21 22:38 ` Ian Lance Taylor
2011-07-21 6:57 ` David Edelsohn
2011-07-21 7:25 ` Eric Botcazou
2011-07-21 14:24 ` David Edelsohn
2011-07-20 17:58 ` Thomas Schwinge
2011-07-20 21:41 ` Toon Moene
2011-07-31 23:20 ` Marc Glisse
2011-08-01 9:14 ` Richard Guenther
2011-08-01 9:53 ` Joseph S. Myers
2011-08-01 9:59 ` Richard Guenther
2011-08-01 10:05 ` Marc Glisse
2011-08-08 17:42 ` Romain Geissler
2011-08-08 18:49 ` Ian Lance Taylor
2011-08-08 19:40 ` Romain Geissler
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