Re: vDSP Intel performance query
Re: vDSP Intel performance query
- Subject: Re: vDSP Intel performance query
- From: "tahome izwah" <email@hidden>
- Date: Tue, 27 May 2008 12:08:40 +0200
Not sure if this is helpful, but might this be an alignment issue?
--th
2008/5/27 Dave Malham <email@hidden>:
> Hi,
> Just been playing with the Accelerate framework and, in particular, vDSP
> with a view to speeding up some of my Ambisonic stuff. I have compiled the
> vDSP examples project and have gotten results which I find a little odd and
> would appreciate some comments/help from you gurus.
>
> On my G4 1.33GHz iBook, I'm typically getting, for the first 2048x256
> convolution in the example project, anything between 4 and 8 GFlops
> performance. However, on our quad core 2.66GHz Mac's in our studios I'm
> only getting around 0.8 GFlops - and on my colleague's Intel power book,
> this goes down to around 0.3 GFlops. Both my iBook and the studio machines
> are running OSX 10.4.11, my colleague's machine is running Leopard so it's
> not OS differences. I've tried compiling natively (ie, not UB) on all
> machines (no alterations to the XCode project as supplied) and then UB on
> all machines, tried playing with optimisations, etc., etc., with little
> effect - am I doing something wrong, or misinterpreting the results, or is
> this an expecting result (it certainly wasn't expected by me...)
>
> Regards
> Dave
>
> --
> These are my own views and may or may not be shared by my employer
> /*********************************************************************/
> /* Dave Malham http://music.york.ac.uk/staff/research/dave_malham/ */
> /* Music Research Centre */
> /* Department of Music "http://music.york.ac.uk/"; */
> /* The University of York Phone 01904 432448 */
> /* Heslington Fax 01904 432450 */
> /* York YO10 5DD */
> /* UK 'Ambisonics - Component Imaging for Audio' */
> /* "http://www.york.ac.uk/inst/mustech/3d_audio/"; */
> /*********************************************************************/
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden