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World Community Grid Forums
Category: Support
Forum: GPU Support Forum
Thread: multiple Cuda Work Units simultaneously on 1 GPU |
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Thread Status: Active Total posts in this thread: 9
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Fullsus
Cruncher Joined: Jan 2, 2013 Post Count: 2 Status: Offline Project Badges: 
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I have Seti@home running 3 Cuda Work units simultaneously on my GTX 650ti GPU by modifying the APP_Info.XML file after installing Lunatics_x41zc. Is there any way of doing the same with Cuda compatible projects in WCG like Help Conquer Cancer?
----------------------------------------cheers, Fullsus [Edit 1 times, last edit by Fullsus at Jan 6, 2013 10:10:58 PM] |
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nanoprobe
Master Cruncher Classified Joined: Aug 29, 2008 Post Count: 2998 Status: Offline Project Badges: 
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I have Seti@home running 3 Cuda Work units simultaneously on my GTX 650ti GPU by modifying the APP_Info.XML file after installing Lunatics_x41zc. Is there any way of doing the same with Cuda compatible projects in WCG like Help Conquer Cancer? cheers, Fullsus The WCG GPU app is coded in OpenCL not CUDA. Nvidia cards have very poor driver support for OpenCl. That being said you might be able to run 2 tasks at a time on on your GTX 650ti but it probably wouldn't be worth the effort.
In 1969 I took an oath to defend and protect the U S Constitution against all enemies, both foreign and Domestic. There was no expiration date.
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Fullsus
Cruncher Joined: Jan 2, 2013 Post Count: 2 Status: Offline Project Badges:
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That's a shame but not the end of the world I suppose.
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RCC_Survivor
Veteran Cruncher USA Joined: Apr 28, 2007 Post Count: 1326 Status: Offline Project Badges: 
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I am presently running 5 threads on a GeForce GTX 480 and i7-2700K 4.3 GHz.
----------------------------------------Windoze 7 and BOINC 7.0.42 64-bit. SSD Raid with Intel Rapid Storage Technology. Getting about 441% gain in WUs per day. Not optimized but I am working in that direction. This PC is not used for anything but crunching so UI response is not an issue. No issues with temperature or errors. Not getting TFlops performance but then it only cost $200. The NVIDIA cards are underrated IMHO.  Be kinder than necessary, for everyone you meet is fighting some battle. Please join the team The survivors  |
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CJ LeJeune
Cruncher Joined: Nov 22, 2012 Post Count: 6 Status: Offline Project Badges:
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Would you mind sharing your app_config and how you determined which settings worked best for your setup? Have not been able to get the results I expect using the various settings I have tried. My approach has been to be agressive with the settings to the point of getting computation errors, then backing off. I am also curious as to the timing (ie make settinsg one day the watch results over the next day or so). Maybe I am not waiting long enough for the results to be posted?
----------------------------------------I watch the CPU to make sure the app_config settings I am using keep the CPU at or near 100%. Running a GTX 260 and GTX550ti. Thanks for the insight CJ  |
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Hypernova
Master Cruncher Audaces Fortuna Juvat ! Vaud - Switzerland Joined: Dec 16, 2008 Post Count: 1908 Status: Offline Project Badges:
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Best results I had was with 4 concurrent taks on a Nvidia 580 GTX and 2 concurrent tasks on a 680 GTX.
----------------------------------------The 6XX series is a disaster compared to the 5XX series. In terms of points per day with a 980X hexacore CPU running with 12 threads and a 580 GTX, I have 8 CPU + 4 GPU threads. You can get in average 200'000 points per day. Wiothe the 680 GTX I have 10 CPU + 2 GPU threads, and get about 100'000 ppd. These numbers can be higher with overclocking, but the ratio remains at 2 to 1 in favor of the 5XX series.  |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
There was a post which discussed that there are 6xx's and 6xx's. Think it was called "rebranded" (reseried)... not really what it says on the box. I've looked around for a 7950 and found at least a dozen different versions [and they are really different on the outside too, single / double fan versions included], the most expensive having 2 display connectors, double slot thick. So what to buy... the 65,000 dollar question [but it will doubtlessly be an ATI being much more OpenCL capable, still]
----------------------------------------[Edit 1 times, last edit by Former Member at Jan 13, 2013 11:14:09 AM] |
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RCC_Survivor
Veteran Cruncher USA Joined: Apr 28, 2007 Post Count: 1326 Status: Offline Project Badges:
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Would you mind sharing your app_config and how you determined which settings worked best for your setup? Have not been able to get the results I expect using the various settings I have tried. My approach has been to be agressive with the settings to the point of getting computation errors, then backing off. I am also curious as to the timing (ie make settinsg one day the watch results over the next day or so). Maybe I am not waiting long enough for the results to be posted? Present settingsI watch the CPU to make sure the app_config settings I am using keep the CPU at or near 100%. Running a GTX 260 and GTX550ti. Thanks for the insight CJ max_concurrent=8 gpu_usage=.2 cpu_usage=1 I have backed off to 5 GPU and 3 CPU threads until I have more time to work on this. There is plenty of room to increase the overclock on the i7. I got up to 8 GPU and 7 CPU threads and started taking errors due to the GPU WUs exceeding the time limit. max_concurrent=16 gpu_usage=.125 (8 threads) cpu_usage=.125 (yes, it was 7 threads not 8) It was taking about 30 minutes to finish 1 GPU WU, which the scheduler did not like and stopped giving me work. I was watching the times and using an Excel spreadsheet but it is not necessary because you can just watch your Avg. work done on the BOINC Manager Projects tab. It is also known as your RAC and it is updated in real time (refresh it) so you have a good idea if the change is better/worse. Keep a record of your settings and the results and the best settings should be easy to find. You can also use process explorer to monitor GPU/CPU usage; look under system information > engines. My final decision is based on the My Results Page stats. The GeForce GTX 480 is a dual warp card meaning it schedules and runs two warps independently. I picked the 480 card because of the price and performance it was a good value. I know it is not the best card but it is far from the worst. Be kinder than necessary, for everyone you meet is fighting some battle. Please join the team The survivors |
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RCC_Survivor
Veteran Cruncher USA Joined: Apr 28, 2007 Post Count: 1326 Status: Offline Project Badges:
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You have to love how consistent BOINC and WCG are.
----------------------------------------Today the Avg. work done is not updating after WUs are reported. Nothing different here except that Present settings are: max_concurrent=8 gpu_usage=.166 cpu_usage=1 6 GPU and 2 CPU threads 6 WUs on one GPU seems to be the best setting for this hardware. Here is my event log showing CPU and GPU info: 1/14/2013 1:41:12 PM | | Processor: 8 GenuineIntel Intel(R) Core(TM) i7-2700K CPU @ 3.50GHz [Family 6 Model 42 Stepping 7] 1/14/2013 1:41:12 PM | | Processor: 256.00 KB cache 1/14/2013 1:41:12 PM | | Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss htt tm pni ssse3 cx16 sse4_1 sse4_2 syscall nx lm vmx tm2 popcnt aes pbe 1/14/2013 1:41:12 PM | | OS: Microsoft Windows 7: Professional x64 Edition, Service Pack 1, (06.01.7601.00) 1/14/2013 1:41:12 PM | | Memory: 15.92 GB physical, 31.84 GB virtual 1/14/2013 1:41:12 PM | | Disk: 59.53 GB total, 9.96 GB free 1/14/2013 1:41:12 PM | | CUDA: NVIDIA GPU 0: GeForce GTX 480 (driver version 310.90, CUDA version 5.0, compute capability 2.0, 1536MB, 1407MB available, 1345 GFLOPS peak) 1/14/2013 1:41:12 PM | | OpenCL: NVIDIA GPU 0: GeForce GTX 480 (driver version 310.90, device version OpenCL 1.1 CUDA, 1536MB, 1407MB available, 1345 GFLOPS peak) The CPU is overclocked to 4.3 GHz and no modifications to the GPU. Be kinder than necessary, for everyone you meet is fighting some battle. Please join the team The survivors |
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