[PD] opengl performance on osX ; Re: four PS3 Eye on Mac Pro and Pd-ext and GEM

Jack jack at rybn.org
Sat May 21 16:37:39 CEST 2011


Le samedi 21 mai 2011 à 13:12 +0200, cyrille henry a écrit :
> hello,
> 
> from my experience, Gem is 2 times faster on the same computer using ubuntu than osX.
> thanks to nvidia profiling tools, Nicolas pointed that gem is limited to 50% usage of the GPU.
> there is certainly a limitation somewhere on osX preventing application to use full performance of the hardware.
Amazing !
> 
> so, you applications are slower, but the interface will always be smooth...
:)
This the first time i see things are much easier on Ubuntu than MacOSX
(installation, configuration, things working directly). Of course, i am
talking about Pd environment, this is not true for all.
++

Jack


> 
> Cyrille
> 
> Le 21/05/2011 12:59, jack at rybn.org a écrit :
> > Hello Chris,
> >
> > If I have time to do this test the next time i will do it (putting the
> > graphic card on the 4x PCIe bus).
> > Now, it works fine with 2 MacPro (with one graphic card and 2 PS3 Eye on
> > each MacPro) and Ubuntu 10.04.
> > I have installed PureData 0.42.5, last GEM from SVN and ATI driver
> > Catalyst for the Radeon HD 5770 and the acceleration is OK.
> > When i was using 'dialog' message, i can't remember what i got.
> > Thanx for your help and suggestion. I will try to test all your
> > recommandations the next time.
> > One remark : it seems the graphic acceleration is better under Ubuntu than
> > MacOSX. Is there a problem with the driver under MacOSX ? (The same patch
> > worked faster under Ubuntu).
> > ++
> >
> > Jack
> >
> >
> >
> >> Jack
> >>
> >> I think two of those cards might draw too much power to run at the same
> >> time?  Also, check the PCIe lane speeds and try running them at 4x or 8x
> >> rather than 16x.
> >>
> >> AS far as getting 4 of the same cam running, it depends on how the driver
> >> presents multiple cams to Quicktime.  It might show up as one device with
> >> four inputs, for example.  Use the 'dialog' message to check it out.
> >>
> >> On Thu, May 19, 2011 at 5:00 AM, Jack<jack at rybn.org>  wrote:
> >>
> >>> Thanx Mathieu,
> >>>
> >>> I will give it a try with your tips.
> >>> I have started to install Ubuntu 10.04 on the Mac Pro and i think i will
> >>> use this OS.
> >>>
> >>> In fact, i am crazy because i have installed two ATI Radeon HD 5770 on
> >>> this Mac Pro (version 5.1). Each card has 2 Mini Display Ports and 1 DVI
> >>> port. On the Apple website it is write each graphic card accept a
> >>> resolution of 2560x1600 px. When i plug 2 TV screen (HDMI and each
> >>> screen with 1280x768px) on the 2 Mini Display Port on one card (with an
> >>> adapter Mini Display Port/HDMI), it works fine. But if i use the second
> >>> card with the same configuration (so 4 TV screen on the 4 Mini Display
> >>> Port), it seems the computer have not enough power, the Finder quit each
> >>> 10 second.
> >>> I use MacOSX.6.6 and this is not the lastest version (the lastest is
> >>> X.6.7 and maybe it is working with this version but now i have no time
> >>> to test this config).
> >>>
> >>> With Ubuntu, the sytem start to load then the 4 screens stay black. I
> >>> have to unplug the 2 cables on one graphic card to boot normaly. So i
> >>> can only use 2 screens.
> >>>
> >>> I don't know where is the problem (power ? Apple computers ?).
> >>> If someone have any experience on this problem, i will be happy to
> >>> listen him.
> >>>
> >>> Now, the solution that i am going to use :
> >>> 1 Mac Pro with Ubuntu and one graphic card (ATI Radeon HD 5770)
> >>> 1 PC with Ubuntu and one graphic card (NVidia GT 440 or NVidia GTX 460)
> >>> ++
> >>>
> >>> Jack
> >>>
> >>>
> >>>
> >>>
> >>> Le mercredi 18 mai 2011 à 11:58 -0400, Mathieu Bouchard a écrit :
> >>>> On Wed, 18 May 2011, jack at rybn.org wrote:
> >>>>
> >>>>> I'm going to work on a Mac Pro with MacOsX.6.7 and the latest stable
> >>>>> Pd-extended 0.42.5. I would like to connect four PS3 Eye on this
> >>>>> computer and use GEM with pix_video to read these four devices in
> >>> four
> >>>>> instance of Pd (=>  one camera per instance of pd). I will use Macam
> >>>>> driver (or something else ?) Is it easy to get each camera working
> >>> in
> >>>>> the same time on this system ? Do you have experience in this area ?
> >>>>
> >>>> My experience with just one cam on OSX and Pd-extended 42 was that
> >>> object
> >>>> creation order mattered because each [pix_video] object automatically
> >>>> opens the first available camera AND the "device 1" method didn't
> >>> work.
> >>>> So, to access only the 2nd camera, I had to create two objects and
> >>> only
> >>>> use the 2nd one.
> >>>>
> >>>> using 4 [pix_video] objects for 4 cameras may work, but they will be
> >>>> assigned by creation order.
> >>>>
> >>>>    _______________________________________________________________________
> >>>> | Mathieu Bouchard ---- tél: +1.514.383.3801 ---- Villeray, Montréal,
> >>> QC
> >>>
> >>>
> >>> _______________________________________________
> >>> Pd-list at iem.at mailing list
> >>> UNSUBSCRIBE and account-management ->
> >>> http://lists.puredata.info/listinfo/pd-list
> >>>
> >>>
> >>
> >
> >
> >
> > _______________________________________________
> > Pd-list at iem.at mailing list
> > UNSUBSCRIBE and account-management ->  http://lists.puredata.info/listinfo/pd-list
> >
> 
> _______________________________________________
> Pd-list at iem.at mailing list
> UNSUBSCRIBE and account-management -> http://lists.puredata.info/listinfo/pd-list

-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: application/pgp-signature
Size: 490 bytes
Desc: This is a digitally signed message part
URL: <http://lists.puredata.info/pipermail/pd-list/attachments/20110521/124fc731/attachment.pgp>


More information about the Pd-list mailing list