Thanks very much Charles and Will for your support. Very much appreciated. Best regards, Shamim
On Nov 13, 2007 12:52 AM, Will Dicharry <[EMAIL PROTECTED]> wrote: > 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 >
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