From: Ilija Kocho <ilijak@siva.com.mk>
To: ecos-devel@ecos.sourceware.org
Subject: Re: Gnutools: consideration for upgrade to GCC 4.6
Date: Fri, 13 Jan 2012 19:39:00 -0000 [thread overview]
Message-ID: <4F108853.4070903@siva.com.mk> (raw)
In-Reply-To: <4F107DE4.7080706@kuantic.com>
On 13.01.2012 19:54, Bernard Fouché wrote:
>
> Le 13/01/2012 18:00, Ilija Kocho a écrit :
>>
>> Our GCC 4.3.2 is ageing and perhaps we should consider an upgrade.
>> My motive is it's lacking of support for Cortex-M4 SIMD (aka DSP) and
>> FPU instructions, but I think that other architectures shall gain
>> from newer compiler too. I have made some signal processing tests
>> with GCC 4.6.2 against current eCos compiler and they show
>> performance gain even with Cortex-M3 setting, though moderate.
>> Performance is considerable when Cortex-M4 setting is selected and is
>> tremendous, as expected, when SIMD are used. Recently introduced
>> Cortex-M products with FPU (Kinetis K70, K61, STM32F4) will further
>> emphasise the benefit.
>>
> That sounds good! Did you try link time optimization ?
I haven't changed any option except -mcpu=cortex-m4. My objective were
SIMD instructions (now with K70 FPU).
> I'm curious what kind of gain it could bring with a real world app.
> eCos seems to fit perfectly for such an optimization, there is no
> shared lib and at link time everythink is visible to the linker.
Worth to try.
Ilija
next prev parent reply other threads:[~2012-01-13 19:39 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-01-13 17:01 Ilija Kocho
2012-01-13 18:54 ` Bernard Fouché
2012-01-13 19:39 ` Ilija Kocho [this message]
2012-01-13 19:09 ` Frank Pagliughi
2012-01-13 19:45 ` Ilija Kocho
2012-01-14 10:22 ` John Dallaway
2012-01-14 16:02 ` Sergei Gavrikov
2012-01-15 17:36 ` Grant Edwards
2012-01-15 18:42 ` Sergei Gavrikov
2012-01-15 21:39 ` Stanislav Meduna
2012-01-23 1:01 ` Jonathan Larmour
2012-01-15 22:21 ` Ilija Kocho
2012-01-15 22:21 ` Ilija Kocho
2012-01-23 1:07 ` Jonathan Larmour
2012-01-16 15:20 ` Grant Edwards
2012-01-16 20:43 ` Sergei Gavrikov
2012-01-16 21:11 ` Sergei Gavrikov
2012-01-17 9:58 ` Bernard Fouché
2012-01-17 10:38 ` Paul Beskeen
2012-01-17 12:28 ` Sergei Gavrikov
2012-01-23 0:59 ` Jonathan Larmour
2012-01-14 16:25 ` Ilija Kocho
2012-01-23 1:13 ` Jonathan Larmour
2012-01-23 18:40 ` Ilija Kocho
2012-01-23 19:29 ` Jonathan Larmour
2012-01-25 12:30 ` Alex Schuilenburg
2012-01-25 20:59 ` Ilija Kocho
2012-01-26 13:36 ` Alex Schuilenburg
2012-01-26 20:18 ` Ilija Kocho
2012-02-13 22:02 ` eCos GNU tools 4.6.2-20120125 ready for testing [Was Re: Gnutools: consideration for upgrade to GCC 4.6] Ilija Kocho
2012-02-20 16:00 ` Alex Schuilenburg
2012-02-20 20:45 ` Ilija Kocho
2012-03-02 16:36 ` Alex Schuilenburg
2012-03-03 13:32 ` Ilija Kocho
2012-03-04 0:10 ` Alex Schuilenburg
2012-03-04 17:49 ` Sergei Gavrikov
2012-03-04 23:08 ` Alex Schuilenburg
2012-03-04 19:37 ` eCos GNU tools 4.6.2-20120125 ready for testing John Dallaway
2012-03-04 23:47 ` Alex Schuilenburg
2012-03-05 8:00 ` Sergei Gavrikov
2012-03-07 13:51 ` Sergei Gavrikov
2012-03-07 11:58 ` Alex Schuilenburg
2012-03-07 13:01 ` Ilija Kocho
2012-03-07 13:39 ` Sergei Gavrikov
2012-03-07 13:13 ` John Dallaway
2012-03-12 16:43 ` Alex Schuilenburg
2012-03-16 15:05 ` Alex Schuilenburg
2012-03-08 17:28 ` Alex Schuilenburg
2012-03-09 9:39 ` Ilija Kocho
2012-03-09 17:15 ` Alex Schuilenburg
2012-03-10 17:16 ` John Dallaway
2012-03-12 16:12 ` Alex Schuilenburg
2012-03-13 13:31 ` Alex Schuilenburg
2012-03-13 14:16 ` Ilija Kocho
2012-03-13 17:47 ` Sergei Gavrikov
2012-03-15 8:50 ` John Dallaway
2012-03-17 14:50 ` Sergei Gavrikov
2012-03-17 20:58 ` John Dallaway
2012-03-17 16:44 ` Stanislav Meduna
2012-03-18 19:10 ` eCos GNU tools 4.6.3-20120315 [Was Re: eCos GNU tools 4.6.2-20120125 ready for testing] Ilija Kocho
2012-04-04 12:57 ` Lambrecht Jürgen
2012-04-04 13:18 ` Ilija Kocho
2012-05-31 8:42 ` eCos GNU tools 4.6.3-20120315 and link time optimization Bernard Fouché
2012-03-05 8:30 ` eCos GNU tools 4.6.2-20120125 ready for testing Tomas Frydrych
2012-03-05 8:56 ` Tomas Frydrych
2012-03-05 9:50 ` John Dallaway
2012-03-05 9:55 ` Anders Montonen
2012-03-05 14:20 ` John Dallaway
2012-03-05 10:16 ` Ilija Kocho
2012-03-05 12:56 ` Tomas Frydrych
2012-03-03 12:58 ` eCos GNU tools 4.6.2-20120125 ready for testing [Was Re: Gnutools: consideration for upgrade to GCC 4.6] Sergei Gavrikov
2012-01-17 9:37 ` Gnutools: consideration for upgrade to GCC 4.6 Tomas Frydrych
2012-01-17 16:10 ` Stanislav Meduna
2012-01-17 16:25 ` Tomas Frydrych
2012-01-17 16:45 ` Ilija Kocho
2012-01-20 14:42 ` Frank Pagliughi
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