cpu and gpu
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Number crunching :
cpu and gpu
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Send message Joined: 6 Apr 20 Posts: 10 Credit: 15,340,408 RAC: 0  
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.417 cpu + 1 nivida gpu. What does .417 cpu mean? |
 mikey Send message Joined: 8 May 09 Posts: 3319 Credit: 520,295,454 RAC: 20,102    
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.417 cpu + 1 nivida gpu. What does .417 cpu mean? It means it's using almost 50% of a cpu core and your gpu to run a task on your gpu |
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Send message Joined: 6 Apr 20 Posts: 10 Credit: 15,340,408 RAC: 0
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I have a quad core proccesser and i am running 4 other work units for a total of 5 work units |
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Send message Joined: 18 Nov 10 Posts: 18 Credit: 175,373,177 RAC: 60,269   
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I have a quad core proccesser and i am running 4 other work units for a total of 5 work units You "running 4 other work units", but those 4 work units plus the GPU 0.417 CPU need are running on 4 CPU. BOINC marks all the work units as "running" but the OS will schedule the 4 CPU among the 5 work units based on the OS scheduling algorithm. The OS overhead will increase when it has to switch between work units it is trying to run. Interestingly, I am running the GPU work units on a Nvidia 2080 ti and MW@H says that those work units require 0.997C. It takes almost a whole CPU to keep the GPU fed. |
Keith Myers Send message Joined: 24 Jan 11 Posts: 708 Credit: 543,143,692 RAC: 143,263
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Because on Nvidia cards, the science application is not as efficient as the science application on AMD cards. Due to differences in both the OpenCL API for both platforms and the difference is gpu architectures. 
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