From: Simon Wright <simon@pushface.org>
Subject: Re: GNAT (GCC) Profile Guided Compilation
Date: Fri, 29 Jun 2012 11:48:10 +0100
Date: 2012-06-29T11:48:10+01:00 [thread overview]
Message-ID: <m2wr2qxul1.fsf@pushface.org> (raw)
In-Reply-To: dac2857a-6f74-4ecb-a5d2-f6b73fbd0ecc@googlegroups.com
Keean Schupke <keean.schupke@googlemail.com> writes:
> I am developing a Monte-Carlo simulation engine, and I have
> implementations in C++ and Ada. All performance figures come from the
> same reference hardware. Both are built using GCC, and similar
> optimisation is applied to each (same optimisation level, cpu arch,
> inlining etc).
>
> My C++ implementation achieves 40,000 simulations per second.
>
> My Ada port initially achieves 32,000 iterations per second.
>
> I refactored the Ada port to use System.Address to access the main
> data structure (as in the 'C++' version benchmarking showed a clear
> performance benefit to *ptr_x compared to array[x])
>
> The Ada port using System.Address achieves 40,000 simulations per
> second - so this is looking good.
Did you try -gnatp (suppress all checks)? (only to be used when you're
sure the code is correct!)
You could also use pragma Suppress at the hot spots.
next prev parent reply other threads:[~2012-06-29 10:48 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-29 9:17 GNAT (GCC) Profile Guided Compilation Keean Schupke
2012-06-29 9:34 ` Dmitry A. Kazakov
2012-06-29 10:01 ` Keean Schupke
2012-06-29 10:24 ` Keean Schupke
2012-06-29 12:26 ` stefan-lucks
2012-06-29 12:51 ` Keean Schupke
2012-06-29 12:05 ` Dmitry A. Kazakov
2012-06-29 10:48 ` Simon Wright [this message]
2012-06-29 11:14 ` Keean Schupke
2012-06-29 12:39 ` gautier_niouzes
2012-06-29 12:52 ` Keean Schupke
2012-06-29 14:14 ` gautier_niouzes
2012-06-29 15:05 ` gautier_niouzes
2012-06-29 17:03 ` Keean Schupke
2012-07-01 9:29 ` Georg Bauhaus
2012-07-01 17:45 ` Georg Bauhaus
2012-07-01 22:57 ` Keean Schupke
2012-07-02 17:15 ` Georg Bauhaus
2012-07-02 17:26 ` Keean Schupke
2012-07-02 23:48 ` Keean Schupke
2012-07-04 10:38 ` Georg Bauhaus
2012-07-04 10:57 ` Keean Schupke
2012-07-04 12:36 ` Mark Lorenzen
2012-07-04 12:38 ` Georg Bauhaus
2012-07-14 20:17 ` Keean Schupke
2012-07-14 20:33 ` Keean Schupke
2012-07-14 20:43 ` Niklas Holsti
2012-07-14 22:32 ` Keean Schupke
2012-07-14 23:40 ` Keean Schupke
2012-07-15 7:15 ` Niklas Holsti
2012-07-15 8:27 ` Keean Schupke
2012-07-18 10:01 ` Georg Bauhaus
2012-07-18 17:36 ` Keean Schupke
2012-07-19 5:42 ` Georg Bauhaus
2012-07-19 10:18 ` Keean Schupke
2012-07-15 11:02 ` Niklas Holsti
2012-07-15 12:48 ` Keean Schupke
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