Message boards : Graphics cards (GPUs) : CPU usage - how does it support GPU processing
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Hello there. This is my first post on this site and am a recent member. I have enjoyed reading through many posts but am curious about something. | |
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ExtraTerrestrial Apes Volunteer moderator Volunteer tester  Send message Joined: 17 Aug 08 Posts: 2705 Credit: 1,311,122,549 RAC: 0 Level  Scientific publications     | |
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Hi Neil, | |
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Hey MrS, thanks for your response. | |
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ExtraTerrestrial Apes Volunteer moderator Volunteer tester Send message Joined: 17 Aug 08 Posts: 2705 Credit: 1,311,122,549 RAC: 0 Level Scientific publications | |
Hope this helps. Sure, I was just a bit curious ;) MrS ____________ Scanning for our furry friends since Jan 2002 | |
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way CPU use only 0.90 of CPU ? instead of 0.98 ? | |
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 Stefan Ledwina Send message Joined: 16 Jul 07 Posts: 464 Credit: 135,911,881 RAC: 56 Level  Scientific publications | |
way CPU use only 0.90 of CPU ? instead of 0.98 ? Simply because it doesn't need a full CPU. Actually it needs only about 0.6 CPU (on Windows). or way it use CPU !!!! and GPU is NOT HOT ((( is seem dos no work at all (((( If you are computing GPUGRID tasks, and get credit for them your GPU is for sure used. These tasks can't run only on a CPU... ____________  pixelicious.at - my little photoblog | |
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Krunchin-Keith [USA] Send message Joined: 17 May 07 Posts: 512 Credit: 111,288,061 RAC: 0 Level Scientific publications  | |
way CPU use only 0.90 of CPU ? instead of 0.98 ? It does not use 0.90 CPU. This is only a number to tell BOINC that the application uses less than 1.00 CPU core. It can be any number between 0.01 and 0.99 and the application will use the same amount of CPU, not the number shown in BOINC. The number only matters for BOINC to reserve CPU space for the application. With the current setting, BOINC will reserve CPUs for the GPU tasks as 0.90 x number of GPU's you have, e.g. 1=0.90, 2=1.80, 3=2.70, 4=3.60. The CPU is necessary to send data/instructions to and receive results from GPU. It also does the disk writing. You cannot just have a GPU only applciation. The GPU is a co-processor, not a dedicated processor. It needs a dedicated processor to feed it. BOINC can use up to 0.99 plus number of cpu cores you have for scheduling, e.g. a dual core can schedule up to 2.99 tasks, where anything over two is a cpu/gpu combination. You need to look in windows task manager to see actual useage.
More info is needed. Does your boinc show CUDA devices and co-processors when it starts. Check message log. Post the lines here that show this. What version o/s, boinc and nvidia drivers do you have ? How many CPUs or cores do you have ? Are you GPU's not in SLI mode ? | |
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i test last time | |
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to day i test in same comp | |
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in other COMP 9550@3800Mhz http://www.gpugrid.net/show_host_detail.php?hostid=15460 | |
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ExtraTerrestrial Apes Volunteer moderator Volunteer tester Send message Joined: 17 Aug 08 Posts: 2705 Credit: 1,311,122,549 RAC: 0 Level Scientific publications | |
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Kodak, the format of your posts is horrible! Please, take a few minutes and make them readable. That would safe people who want to help you from getting head aches! | |
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Message boards : Graphics cards (GPUs) : CPU usage - how does it support GPU processing
