From: Charly <carl.weierstrass@googlemail.com>
Subject: Re: Poor performance with GNAT-GPL-2017
Date: Mon, 12 Jun 2017 11:22:34 -0700 (PDT)
Date: 2017-06-12T11:22:34-07:00 [thread overview]
Message-ID: <1d84e860-6563-4e55-83ca-91be59b9c562@googlegroups.com> (raw)
In-Reply-To: <b217192d-336d-4442-be83-6e470d6f6772@googlegroups.com>
Am Montag, 12. Juni 2017 14:22:00 UTC+2 schrieb Emile:
> Le samedi 10 juin 2017 13:23:34 UTC+2, Charly a écrit :
> > Hi,
> >
> > when I found the new GNAT-GPL-2017 this morning I was happy and installed it at once.
> > But I was rather disappointed about the poor performance.
> > To be more precise:
> >
> > When I switch to new hard- or software I allways check the performance with my private tool:
> > It solves Rubics Tabgle https://www.jaapsch.net/puzzles/tangle.htm with an ada programm, using one task per core.
> >
> > With GNAT-GPL-2016 (gcc 4.9.4) it took about 0,4 sec to find both solutions,
> > with GNAT-GPL-2017 (gcc 6.3.1) it takes about 0,8 sec to find both solutions,
> > which means the program is slower by a factor of 2.
> >
> > In both cases I use the following options:
> > -O3 -gnatA -gnatn -funroll-loops -fPIC -gnatp -g -gnatW8 -gnatVn -mtune=amdfam10 -gnat12
> >
> > Any ideas??
> >
> > Sincerly
> > Charly
>
> Is it the 64 Bits Linux version of GNAT which presents this performance slow down ?
Yes, Xubuntu GNU/Linux with Kernel 4.10 on AMD FX 8350 (8 cores)
next prev parent reply other threads:[~2017-06-12 18:22 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-10 11:23 Poor performance with GNAT-GPL-2017 Charly
2017-06-10 12:43 ` Jacob Sparre Andersen
2017-06-11 20:48 ` Robert Eachus
2017-06-12 19:00 ` Charly
2017-06-13 4:14 ` Robert Eachus
2017-06-13 13:57 ` Lucretia
2017-06-13 17:41 ` Robert Eachus
2017-06-12 12:21 ` Emile
2017-06-12 18:22 ` Charly [this message]
2017-06-12 15:28 ` Mark Lorenzen
2017-06-13 19:46 ` alkhimey
2017-06-15 15:19 ` Charly
2017-06-15 16:31 ` Charly
2017-06-15 18:00 ` Anh Vo
2017-06-15 19:21 ` Charly
2017-06-15 19:24 ` Anh Vo
2017-06-16 21:33 ` stephane.carrez
2017-06-21 14:29 ` gautier_niouzes
2017-06-20 22:39 ` Anatoly Chernyshev
2017-06-19 10:26 ` briot.emmanuel
2017-06-19 12:25 ` Simon Wright
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