[Flightgear-devel] Shaders and ATI Radeon HD 4670
Hi all, I cannot use material shaders on my iMac (late 2009 model) equipped with an ATI graphics card (ATI Radeon HD 4670 256 MB VRAM). I only get a few fps standing on ground at an isolated airfield. There is almost no objects. Every 10 times I get 60 fps in cockpit view with no changes except restarting flightgear. Toggling through different view gives different frame rates where the tower views always gives around 60 fps and the others give 2-5 fps (except the occasional 60 fps I get in the cockpit view). In cases when I get 60 fps in cockpit view my computer maintains 60 fps with 3D clouds and skydome scattering turned on. The frame rate is stable even flying through the magnificently rendered clouds. If I turn of material shaders I always get 60 fps in all different views. (Is 60 fps a maximum reading, I never seem to get higher readings?) On my Macbook Pro (early 2008) model, I always get 60 fps staying away from the 3D clouds but the frame rate drops to 20 fps when I fly through clouds. The MBP has a GeForce 8600M GT 256 MB VRAM. The test on my iMac was done on yesterdays source from the various repositories and everything is compiled with -g -O3 (-O2 gives the same numbers). I have also tested a couple of Tat's git snapshots from the macflightgear site and they give similar negative shader effect. I read through many posts on flightgear and shaders on the web but nothing has resolved my issue. Is the above a flightgear issues or is it my hardware? I haven't noticed anything strange with my iMac and Apples extended hardware test does not report anything. Cheers, Jari -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense.. http://p.sf.net/sfu/splunk-d2d-c1 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Shaders and ATI Radeon HD 4670
Jari I cannot use material shaders on my iMac (late 2009 model) equipped with an ATI graphics card (ATI Radeon HD 4670 256 MB VRAM). I only get a few fps standing on ground at an isolated airfield. There is almost no objects. Every 10 times I get 60 fps in cockpit view with no changes except restarting flightgear. Toggling through different view gives different frame rates where the tower views always gives around 60 fps and the others give 2-5 fps (except the occasional 60 fps I get in the cockpit view). In cases when I get 60 fps in cockpit view my computer maintains 60 fps with 3D clouds and skydome scattering turned on. The frame rate is stable even flying through the magnificently rendered clouds. If I turn of material shaders I always get 60 fps in all different views. (Is 60 fps a maximum reading, I never seem to get higher readings?) On my Macbook Pro (early 2008) model, I always get 60 fps staying away from the 3D clouds but the frame rate drops to 20 fps when I fly through clouds. The MBP has a GeForce 8600M GT 256 MB VRAM. The test on my iMac was done on yesterdays source from the various repositories and everything is compiled with -g -O3 (-O2 gives the same numbers). I have also tested a couple of Tat's git snapshots from the macflightgear site and they give similar negative shader effect. I read through many posts on flightgear and shaders on the web but nothing has resolved my issue. Is the above a flightgear issues or is it my hardware? I haven't noticed anything strange with my iMac and Apples extended hardware test does not report anything. The most _likely_ cause is the ATI Radeon HD 4670/256 MB VRAM. The GeForce 8600M GT is known to be better at handling shaders. 256 Mb VRAM is in both cases a bit small for FG nowadays. There are other possible contributors to a low framerate - AI traffic is one. 60 fps could be a maximum if you are using this option - --prop:/sim/frame-rate-throttle-hz=60 It might well be on by default. Vivian -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense.. http://p.sf.net/sfu/splunk-d2d-c1 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Shaders and ATI Radeon HD 4670
On Sat, 25 Jun 2011, Vivian Meazza wrote: The most _likely_ cause is the ATI Radeon HD 4670/256 MB VRAM. The GeForce 8600M GT is known to be better at handling shaders. 256 Mb VRAM is in both cases a bit small for FG nowadays. There are other possible contributors to a low framerate - AI traffic is one. Wow. That's an incredibly small amount of video RAM for a video card that new. Can you upgrade it to something with more RAM? g. -- Proud owner of F-15C 80-0007 http://www.f15sim.com - The only one of its kind. http://www.simpits.org/geneb - The Me-109F/X Project Some people collect things for a hobby. Geeks collect hobbies. ScarletDME - The red hot Data Management Environment A Multi-Value database for the masses, not the classes. http://www.scarletdme.org - Get it _today_! Political correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end. -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense.. http://p.sf.net/sfu/splunk-d2d-c1 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Shaders and ATI Radeon HD 4670
On 2011-06-25 17.34, Gene Buckle wrote: On Sat, 25 Jun 2011, Vivian Meazza wrote: The most _likely_ cause is the ATI Radeon HD 4670/256 MB VRAM. The GeForce 8600M GT is known to be better at handling shaders. 256 Mb VRAM is in both cases a bit small for FG nowadays. There are other possible contributors to a low framerate - AI traffic is one. Wow. That's an incredibly small amount of video RAM for a video card that new. Can you upgrade it to something with more RAM? Otherworldcomputing.com has two options; ATI Radeon HD 5670/512MB (USD180) and ATI Radeon HD 5750/1GB (USD400). 400 is a lot, will the cheaper 512MB card make a noticeable difference? And, opening an iMac isn't for the faint-hearted. Jari -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense.. http://p.sf.net/sfu/splunk-d2d-c1 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Shaders and ATI Radeon HD 4670
On 2011-06-25 16.06, Vivian Meazza wrote: The most _likely_ cause is the ATI Radeon HD 4670/256 MB VRAM. The GeForce 8600M GT is known to be better at handling shaders. 256 Mb VRAM is in both cases a bit small for FG nowadays. There are other possible contributors to a low framerate - AI traffic is one. 60 fps could be a maximum if you are using this option - --prop:/sim/frame-rate-throttle-hz=60 It might well be on by default. I am not using the frame-rate-throttle option but I tried it with a lower limit. This will naturally decrease the frame rate so it seems like 60 is a limiting number. I have to decide if the 3D clouds are worth a graphics card upgrade. Thanks for the response. Jari -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense.. http://p.sf.net/sfu/splunk-d2d-c1 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Shaders and ATI Radeon HD 4670
Am 25.06.11 17:59, schrieb Jari Häkkinen: Otherworldcomputing.com has two options; ATI Radeon HD 5670/512MB (USD180) and ATI Radeon HD 5750/1GB (USD400). 400 is a lot, will the cheaper 512MB card make a noticeable difference? And, opening an iMac isn't for the faint-hearted. Jari Hi Jari I have a ATI Radeon 5750 with 1 GB and the only difference is that (still remaining) shader issues on OSX with ATI are rendered faster. Cheers, Yves -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense.. http://p.sf.net/sfu/splunk-d2d-c1 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Shaders and ATI Radeon HD 4670
On Saturday, June 25, 2011 09:04:30 AM Jari Häkkinen wrote: On 2011-06-25 16.06, Vivian Meazza wrote: The most _likely_ cause is the ATI Radeon HD 4670/256 MB VRAM. The GeForce 8600M GT is known to be better at handling shaders. 256 Mb VRAM is in both cases a bit small for FG nowadays. There are other possible contributors to a low framerate - AI traffic is one. 60 fps could be a maximum if you are using this option - --prop:/sim/frame-rate-throttle-hz=60 It might well be on by default. I am not using the frame-rate-throttle option but I tried it with a lower limit. This will naturally decrease the frame rate so it seems like 60 is a limiting number. I have to decide if the 3D clouds are worth a graphics card upgrade. Thanks for the response. Jari The 60 FPM limit is probably because the diver is syncing to the vblank signal from the monitor. For most LCD type monitors with will either be 60Hz or 120Hz. For the nvidia X11 drivers you can turn sync to vblank on and off. I generally have mine on since there is no reason to have the video card produce a frame rate higher than the monitor refresh rate. I don't know if this is configurable in the OS/X video drivers. Hal --- --- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense.. http://p.sf.net/sfu/splunk-d2d-c1 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense.. http://p.sf.net/sfu/splunk-d2d-c1___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
