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

[chris clepper]

Does the performance improve in fullscreen?  I can see having to share time
with the rest of the GUI, but in full screen there is nothing else taking
time.

 Sat, May 21, 2011 at 7:12 AM, cyrille henry <ch at chnry.net> wrote:

> 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.
>
> so, you applications are slower, but the interface will always be smooth...
>
> 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
>>>>
>>>>
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>>>
>>
>>
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