Activate nVIDIA Optimus under Java/OpenGL? -


i know it's asked several times no clear answer , filed bug nvidia. however, i'm still seeking better workaround starting javafx in prism-d3d engine (which allows subsequent opengl context created via nvidia).

environment:

  • nvidia 860m, driver 337.88, 340.43, 340.66 (quadro driver)
  • java 8u11 (tested x86/x64 & java 7 well)

tested , failed:

  • nvidia profile
  • nvoptimusenablement (custom launcher written in c)
  • calling opencl first (custom launcher written in c)
  • calling cuda first (jcuda, shows nvidia name opengl remains unaffected)

failed apis:

workarounds:

  • javafx8 d3d pipeline. glcontext created after d3d initialization work.

i nailed problem simple sample, calling realtech-vr opengl extension viewer (written in .net). inside there native "infogl.dll" reads gl information , apparently activates optimus right after oevclientinitialize.

the weirdness that, simplest console program calling infogl.dll works:

    win32.oevsetdriverversion("10.18.10.3621", 2176);     win32.oevclientloaddatabase(file.readalltext("c:\\program files (x86)\\realtech vr\\opengl extensions viewer 4.1\\extensions.xml"));     win32.oevclientinitialize();     (var = 0; <= 9; i++)     {         var tree = marshal.ptrtostringansi(win32.oevclientgetcapsandexttree(i));         console.writeline(tree.split('\n').first(ln => ln.contains("text_id=\"357\"")));     }     console.readline();

but same code in java jna doesn't:

    infogl.instance.oevsetdriverversion("10.18.10.3621", 2176);     string extxml = null;     try {         extxml = new string(                 files.readallbytes(paths.get("c:\\program files (x86)\\realtech vr\\opengl extensions viewer 4.1\\extensions.xml")),                 "utf-8");     } catch (ioexception e) {         throw new runtimeexception(e);     }     infogl.instance.oevclientloaddatabase(extxml);     infogl.instance.oevclientinitialize();     (int = 0; <= 9; i++)     {         string tree = infogl.instance.oevclientgetcapsandexttree(i);         system.out.println(arrays.aslist(tree.split("\\n")).first(ln -> ln.contains("text_id=\"357\"")));     }

and it's unrelated executable name "java" - have tried.

the javafx d3d solution unsuitable because reduces opengl fps half on amd radeon chips - assume must bad on nvidia ones, , that's why seek work es2 pipeline.

launching jvm .net apparently works (via jni4net). crashes in nvoglv64.dll @ end of javafx finalization through.

using net.sf.jni4net; using net.sf.jni4net.utils; ...      public static void main(string[] args)     {         initializeopengl();         var setup = new bridgesetup();         setup.addclasspath(@"c:\program files\java\jdk1.8.0_11\demo\javafx_samples\modena.jar");         setup.addjvmoption("-dprism.order=es2");         setup.addjvmoption("-dprism.verbose=true");         var env = bridge.createjvm(setup);         java.lang.system.@out.println("greetings c# java world!");         console.writeline("initializing...");         var klass = env.findclass("modena/modena");         console.writeline("finding main()...");         var mainmethodid = klass.getmethods().first(m => m.getname().equals("main")).getmethodid();         console.writeline("calling main()...");         env.callstaticvoidmethod(klass, mainmethodid, convertor.pararraystrongc2jstring(env, new string[0]));         console.writeline("ended, press enter");         console.readline();     }      protected static void initializeopengl()     {         win32.oevsetdriverversion("10.18.10.3621", 2176);         win32.oevclientloaddatabase(file.readalltext("c:\\program files (x86)\\realtech vr\\opengl extensions viewer 4.1\\extensions.xml"));         win32.oevclientinitialize();         (var = 0; <= 9; i++)         {             var tree = marshal.ptrtostringansi(win32.oevclientgetcapsandexttree(i));             console.writeline(tree.split('\n').first(ln => ln.contains("text_id=\"357\"")));         }         // optimus should activated now!     }

i have yet found real reason optimus activated under .net...... it's c/c++ of same code wouldn't work, since it's java version (jni calls)

ps: verified "opentk" (.net wrapper of opengl) cannot activate optimus either. i'm totally confused.....


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