I would like to take a moment to show a snap shot of how these optimizations
have impacted our game. To interpret the data, they show frames per second
where the first column keeps an average of the lowest times, the middle
keeps the overall average, and the right keeps track for the highest time
Thanks for posting this link. I'll definitely want to look at this.
James Killian
- Original Message -
From: "Benjamin Eikel" <[EMAIL PROTECTED]>
To: "OpenSceneGraph Users"
Sent: Tuesday, August 05, 2008 3:11 AM
Subject: Re: [osg-users] Using SSE with
Hello,
some days ago I stumbled upon a library: liboil [1]. Maybe some of the
routines implemented there could be used for OSG.
The library contains different functions (e. g. arithmetic ones) that are
optimized for different processeor architectures (it uses SSE or Altivec for
example). Maybe
I can help.
James Killian
- Original Message -
From: Robert Osfield
To: "OpenSceneGraph Users"
Sent: Sunday, Aug 3, 2008 05:58 AM
Subject: Re: [osg-users] Using SSE within OSG
Hi Guys,
I've read through the correspondence on this issue, but won't dive in
with revie
Hi Guys,
I've read through the correspondence on this issue, but won't dive in
with reviewing submissions on this topic till well after 2.6.0 is out
the door.
As a general note, there seems to be two related topics - data
alignment and then SSE instructions, they are of course related but
I'd sug
James,
The most obvious problem: Group::traverse ...
Is one of the visitors you use a TRAVERSE_ALL_CHILDREN visitor? If so, the
Group::traverse profile makes sense. Make sure that you do traverse only this
subgraphps you need to traverse. You can then minimize that calls too. Will
help overall
h" <[EMAIL PROTECTED]>
To: "OpenSceneGraph Users"
Sent: Tuesday, July 29, 2008 10:14 AM
Subject: Re: [osg-users] Using SSE within OSG
James,
On Tuesday 29 July 2008 16:59, James Killian wrote:
Paul asked me the same question a few days ago, and I just realized that
we
took t
- Original Message -
From: "Gordon Tomlinson" <[EMAIL PROTECTED]>
To: "'OpenSceneGraph Users'"
Sent: Tuesday, July 29, 2008 2:58 PM
Subject: Re: [osg-users] Using SSE within OSG
> HI
>
> I can only go buy our low level masters and th
real-time
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of James
Killian
Sent: Tuesday, July 29, 2008 11:38 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] Using SSE within OSG
Sorry...
I interpreted Gordon's response as follows:
MS does a poor j
PROTECTED]>
To: "OpenSceneGraph Users"
Sent: Tuesday, July 29, 2008 10:14 AM
Subject: Re: [osg-users] Using SSE within OSG
James,
On Tuesday 29 July 2008 16:59, James Killian wrote:
> Paul asked me the same question a few days ago, and I just realized that
we
> took that offline
or
places that need it.
I hope this clears things up.
- Original Message -
From: "David Spilling" <[EMAIL PROTECTED]>
To: "OpenSceneGraph Users"
Sent: Tuesday, July 29, 2008 10:17 AM
Subject: Re: [osg-users] Using SSE within OSG
> James,
>
>
> >
James,
> I have to disagree, using VS 7 and up to VS 9.
Just to clarify - what are you disagreeing with? Do you find that MS
compilers will produce SSE vectorised code _without_ use of intrinsics or
raw __asm?
David
___
osg-users mailing list
osg-use
James,
On Tuesday 29 July 2008 16:59, James Killian wrote:
> Paul asked me the same question a few days ago, and I just realized that we
> took that offline so I'll repost here:
> One of the things I should add is the actual profile dump, since that shows
> a more comprehensive picture. The actu
uot;Gordon Tomlinson" <[EMAIL PROTECTED]>
To: "'OpenSceneGraph Users'"
Sent: Tuesday, July 29, 2008 8:56 AM
Subject: Re: [osg-users] Using SSE within OSG
> MS does a very poor job,
>
> I know most of our SSE is asm'ed
>
>
>
> _
>
&g
Hi All,
Regarding question 2:
Wouldn't it be possible to dynamically link different versions of the
OSG-DLLs?
So there would be two Version of the DLLs, one with the
SSE-Optimizations and one with the straightforward code.
I've seen examples of games some years ago, where they linked different
me?
>
> Regards,
> Paul
>
-snip---
---
- Original Message -
From: "Mathias Fröhlich" <[EMAIL PROTECTED]>
To: "OpenSceneGraph Users"
Sent: Tuesday, July 29, 2008 9:31 AM
Subject: Re: [osg-users] Using SSE within OS
Hi,
On Tuesday 29 July 2008 15:18, James Killian wrote:
> I 100% agree with that as that is the first thing I did. For the matrixf
> mult I got 50% improvement with aligned data and 35% with unaligned. For
> the Invert4x4 I got 80% improvement with aligned and 70% aligned with
> unaligned. I'v
MS does a very poor job,
I know most of our SSE is asm'ed
_
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of David
Spilling
Sent: Tuesday, July 29, 2008 9:11 AM
To: OpenSceneGraph Users
Subject: Re: [osg-users] Using SSE within OSG
Benjamin,
may I suggest
Benjamin,
>
> And please do not get me wrong. I do not want to stop your efforts to
> improve
> the performance of OSG; far from it!
Not necessarily my efforts - I'm just being the messenger...!
But putting assembler code into the
> project decrease the readability and serviceability of the cod
es Killian
- Original Message -
From: "Benjamin Eikel" <[EMAIL PROTECTED]>
To: "OpenSceneGraph Users"
Sent: Tuesday, July 29, 2008 7:28 AM
Subject: Re: [osg-users] Using SSE within OSG
Am Dienstag, 29. Juli 2008 14:04:59 schrieb David Spilling:
Dea
Benjamin,
> may I suggest that you check the assembler code that the compilers create
> when
> compiling the OSG code?
> ... g++ with -march=core2 -O3 (see man page for description
> of parameters) the compiler automatically uses SSE
I don't have much recent Linux/gcc experience, but can cer
Am Dienstag, 29. Juli 2008 14:28:18 schrieb Benjamin Eikel:
> Am Dienstag, 29. Juli 2008 14:04:59 schrieb David Spilling:
> > Dear All,
>
> [...]
>
> > Any other suggestions?
> >
> > *Question 3 : (possibly the biggest) Should the core OSG include SSE?*
> > There are several downsides to including
Am Dienstag, 29. Juli 2008 14:04:59 schrieb David Spilling:
> Dear All,
[...]
> Any other suggestions?
>
> *Question 3 : (possibly the biggest) Should the core OSG include SSE?*
> There are several downsides to including SSE. Firstly, x-platform provision
> of SSE may be tricky due to the way diffe
Hi David
My company makes very heavy use of SSE in our main products, and there are
vast speed improvements to be gained, sadly I don't have permission to
provide profiling data
We use SSE's for heavy heavy matrix work outside of OSG, we use some we have
added to our OSG/OGL apps such as for no
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