I don't have access to the machine that I was able to fix it on right now, so I don't know the exact version of the drivers. For the 7900 card, all I had to do was install the vendor drivers that came with the card. I believe the vendor on that one was EVGA. I will be able to check the version tomorrow.
I've had the problem on two 8800 GTX cards, one an Asus, the other an Evga. I have not been able to fix it on the Evga card yet. On the Asus card, there is an option in the Nvidia control panel under the 3d settings about threading that doesn't appear on the Evga machine. I have no idea why that is. That option fixed the problem on the Asus card. I will be able to check the exact name and setting of that option tomorrow. I will send another email tomorrow after I check the driver version and the extra setting to give you more information. Will On Nov 11, 2007 7:36 PM, Akhtar Shamim <[EMAIL PROTECTED]> wrote: > Hi Will, > > Is it possible for you to link me to the driver which solves the problem? > That will be very helpful to me. > > Regards, Shamim > > > > On Nov 12, 2007 9:02 AM, Akhtar Shamim < [EMAIL PROTECTED]> wrote: > > Thanks for your replies. Robert, I am using windows XP Pro with service > pack 2. The problem happens with GeForce 8800 GTX cards. > > > > Will, is there any solution to this or do I need to change my graphics > cards? > > > > Regards, Shamim > > > > > > > > > > > > On Nov 12, 2007 5:53 AM, Will Dicharry <[EMAIL PROTECTED]> wrote: > > > > > Hi, I am not sure if this is the same problem, but I have an > > > application that uses large paged databases and have seen a slow down > > > on a higher end machine with a GeForce 7900 The slow down was only on > > > Windows, Linux ran fine. After tracking it down, I found out that the > > > bottleneck was actually in the graphics drivers. After installing an > > > older version of the drivers, the performance went back up again. > > > I've also seen the same behavior on a machine with a GeForce 8800 GTX. > > > Unfortunately, I cannot find an older version of the drivers for that > > > card. Again, I don't know if this is the same problem, but the > > > performance loss on a higher end machine rang a bell in my head. > > > > > > Will > > > > > > > > > > > > > > > On Nov 10, 2007 12:31 AM, Akhtar Shamim <[EMAIL PROTECTED]> wrote: > > > > Dear All, > > > > > > > > Lately I had been seeing a very obscure problem with our OSG > application. > > > > > > > > The application uses a very large Terra Vista paged terrain. I see the > > > > following two phenomena: > > > > > > > > 1. With all our old computers (i.e. computers having a single core > CPU, 1 GB > > > > or less RAM and with graphics card < NVidia 6600) the application > gives a > > > > constant update rate of 60 Hz. No problem with any refresh rate > issues. > > > > > > > > 2. However, when I try the same application on a high end machine > (Dual Core > > > > CPU or Quad Core CPU and with graphics card 7800 GT++) the performance > is > > > > very poor and quite unpredictable. I looked at the CPU usages and > found that > > > > the CPU usage is below 20 % for most of the CPUs. The application > crawls at > > > > less than 6-7 Hz. However, if I change the BIOS setting to use only > one CPU > > > > the application is back to normal and runs at constant 60 Hz. > > > > > > > > It seems to me that the database pager isnt working perfectly with > multiple > > > > CPUs and gets deadlocked. I am very confused with this situation. For > our > > > > deployment we have all new machines with dual and quad core CPUs and > latest > > > > graphics cards. > > > > > > > > I would be very happy to hear suggestion/advice on how to solve this > > > > performance issue. To be honest I am quite stuck with the problem. I > have > > > > tried compiling our application with OSG 1.2 and OSG 2.0. The > phenomenon is > > > > the same. > > > > > > > > Best regards. > > > > > > > > > > > > > > > > > _______________________________________________ > > > > osg-users mailing list > > > > [email protected] > > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > > > > > > > _______________________________________________ > > > osg-users mailing list > > > [email protected] > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > > > > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
