I just wanted to try out SETI now and faced a problem: If I run SETI, it uses 0.3CPUs compared to the 0.0899 Amicable Numbers needs. This means, that I can either let 3 CPU workloads + 1 SETI workload rund, or 4 CPU Workloads and SETI at 60%CPU usage, since the gpu is bottlenecked by the lack of CPU I guess.
Both solutions do not seem very satisfactory to me. Can I somehow use the other .7 of this CPU core or would I just have to let do not much?
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Yes - just run your CPUs at 100% load. The GPU will take priority over the CPU work, and only be very slightly throttled at worst. I tested this and noted very limited throttling.
The only time when you need to keep a whole core or two free for your GPU is when your GPU is effectively doing all your mining (it is the star of your rig), such as an FP64 GPU on MilkyWay@Home would be.
Effectively, setting your CPUs to 100% will let your system run one GPU job at practically 100%, three CPU jobs at 100%, and one CPU job at 70% load. Check task manager and you can verify. =)
I am running Ubuntu, and watching the GPU usage, I see only 40-60% being used when I run SETI and 4 cores. Amicable Numbers used the GPU 100%. Could it be, that my CPU is just not fast enough with its 30% for the GPU?
I doubt it. What does the GPU usage on SETI look like with one CPU left idle for it?
Then it goes to ~90%
Looks like in your case you are throttled... =/
This is where you will need to do some experimenting to see what set-up works best for your hardware. Good luck!
Okay, thank you again very much for you time and all the Posts you have written!