On 10/2/2010 5:40 AM, thorsten.i.r...@jyu.fi wrote: > To follow up on my previous message: > >> Not so with my GIT binary: Loading of the initial cloud configuration >> brings me down to 4 fps, and every time (!) a cloud is loaded from the >> buffer my framerate drops from 34+ to something like 20+ for a moment - >> which makes the whole experience rather jerky. > I have now made a series of tests to quantify the effect. The test > situation is > > --disable-fullscreen --geometry=1200x900 --aircraft=ufo --airport=KINS > --timeofday=noon --disable-real-weather-fetch > > 2.0.0 prebuilt: > > empty sky: 190 fps > with 3d clouds: 128 fps > with static cold sector tile: 90 fps when loaded,> 34 while loading > with dynamical cold sector tile: 45 fps when loaded,> 30 while loading > > (note that this is *not* a fair comparison between standard 3d clouds and > local weather clouds as the visibility and cloud view distance is rather > different - not the point of the exercise) > > GIT built against my self-compiled OSG 2.9.10: > > empty sky: 234 fps > with 3d clouds: 145 fps > with static cold sector tile: 95 fps when loaded,> 6 (!) while loading > with dynamical cold sector tile: 46 fps when loaded,>7 (!) while loading > > GIT build against the prebuilt OSG 2.9.6 coming with my 2.0.0 binary: > > empty sky: 230 fps > with 3d clouds: 128 fps > cold sector, static: 90 fps when loaded,> 6 while loading > cold sector dynamical: 48 fps when loaded,> 8 while loading > > > From this I conclude that what I'm seeing is not associated with OSG or > the way I compile OSG. I also conclude that it's not related to > performance issues of GIT in general - I get actually a better framerate > than in 2.0.0 with GIT once things are loaded. > > But there is a dramatical difference in the impact on performance while > new models are loaded (if you're flying, 30 fps vs. 6 fps is an issue...). > That difference must be somewhere in the simgear or flightgear code. > > I can only stress that finding that difference and making GIT as fast as > 2.0.0 in loading models will decide if local weather runs smoothly or not. > At this point, the system itself is now fairly optimized and runs > reasonably fast. Any help would be most welcome. > > Cheers, > > * Thorsten > >
I've had some luck using the Intel compiler instead of gcc on processor heavy applications. It would be interesting to see what effect it may have on FG performance. http://software.intel.com/en-us/articles/non-commercial-software-download/ ------------------------------------------------------------------------------ Beautiful is writing same markup. Internet Explorer 9 supports standards for HTML5, CSS3, SVG 1.1, ECMAScript5, and DOM L2 & L3. Spend less time writing and rewriting code and more time creating great experiences on the web. Be a part of the beta today. http://p.sf.net/sfu/beautyoftheweb _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
