Re: [osg-users] Performance issue with Database Pager Terra Vista Files
Hi Will, Thank you very much for the suggestion. I will try this out ASAP and will let you know if it works. By the way, is NVidia aware of this problem? If they are then they should be fixing this problem. Best regards, Shamim On Nov 14, 2007 1:09 PM, Will Dicharry [EMAIL PROTECTED] wrote: Hi, For the 7900 card, the driver version that fixed the slow down was 83.91. For the 8800 GTX card, I have not been able to find a driver version to fix it. However, after hearing that it happened on another dual core machine, I was able to find others with the problem. It appears that it is an Nvidia bug. There are a couple of possible solutions. In the Nvidia control panel you may have a setting called Threaded Optimization. One of our computers has that setting available, but for some reason it doesn't appear on another. If you do have that setting, turning it off appears to fix the problem. If you don't have the setting, you can still turn it on or off in the registry. The path to the value is HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Video\[your GUID here]\ if you have the value OGL_ThreadControl, set it to DWORD:0002. If you don't have it, you can add it. I did this on my dual core machine and that seemed to fix the problem. This setting apparently controls the driver threading, and there are a number of people that have reported the problem on dual core machines. This site: http://forums.nvidia.com/lofiversion/index.php?t9875.html has some information about the problem. I hope this works for you, let me know how it turns out. Good luck, Will On Nov 12, 2007 10:59 PM, Akhtar Shamim [EMAIL PROTECTED] wrote: 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
Re: [osg-users] Performance issue with Database Pager Terra Vista Files
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 osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Performance issue with Database Pager Terra Vista Files
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 osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Performance issue with Database Pager Terra Vista Files
Hi Aktar, I have been working with dual core machines and paging for the past two years without deadlocks, and for the last thee months have been using a quad core machine without issue. What OS are you using? Robert. On Nov 10, 2007 7:31 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 osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Performance issue with Database Pager Terra Vista Files
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 osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Performance issue with Database Pager Terra Vista Files
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 osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
