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Member Since 26 May 2007
Offline Last Active Yesterday, 08:32 AM

Topics I've Started

Metal Particles (as demo /bench) new Nbody-Metal (demo/bench)

06 November 2015 - 11:56 AM


After investigation it is clear that the DEMO is really more an DEMO, and not usable as bench - because CPU bound limit, very huge cpu loads generating and moving that particles.



From here : https://github.com/F...alKit-Particles


compiled app 2Mill final version:


Screenshoot shows low cpu usage but very high (full) GPU load = i think diff gpus should perform different, compared to the demo below.

12 FPS GT  740

20 FPS GTX 650



DL: Attached File  OSXMetalParticles_2Mill_final.zip   1.87MB   261 downloads


Attached File  Bildschirmfoto 2015-11-10 um 12.25.00.jpg   606.61KB   12 downloads



some new METAL playground N-body Metal demo   :) , well known as cuda, opencl bench - now computes with metal - but i see that more as an demo,not as an benchmark

threadwidth + maxthreadspergroup may very between drivers/gpu models and are shown as info


Key s switches between METAL devices - if you have more than one.

Info: Metal is limited to 60 FPS - if you run in that limit you can use key + to get more bodies (up to 96K)  = more gpu work, less FPS


Attached File  Bildschirmfoto 2015-11-13 um 12.22.26.jpg   87.1KB   4 downloads




DL: Attached File  NBody-Metal_test1.zip   1.62MB   178 downloads






Nvidia GT440 - Apple driver = OpenCL probs, Nvidia driver = CoreImage/Video/Preview probs

22 October 2015 - 12:28 PM


since El Captain (not Yosemite) i have problems with my GT 440.

Using Apple driver all is working good- except most OpenCL progs. Most crash at start or later in the gpu tasks.

If i use Nvidia Web drivers, OpenCL progs run well - but even worst probs (for everyday usage):

Preview stalls a few seconds using sharpen, other functions. 

Videoplayer like Movist, MplayerX show no video, window has yellow colour.


I can find, using Nvidia Web drivers (also newest) and apps like Video and Preview : 

22.10.15 11:59:11,197 Preview[652]: HWJPEG not avaialble on this platform (funny, avaialble really wrong written in the console log ;) )


Would be interesting which kext or framework part writes that HWJPEG not avaialble on this platform message in the log!


EDIT: Found HWJPEG in framework  /System/Library/Frameworks/ImageIO.framework/

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