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@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, Jackjack@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@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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