I'm recently trying some crypto-coin mining and both on my desktop equipped with a decent GPU as well as on an AWS virtual machine with GPU support, CPU time is always reported at 99% by /usr/bin/top utility while mining.
Now the fact is that as far as i know while GPU mining CPU should not be involved in the process that much (GPU should do the whole job), so my question is: does anyone know if the aforementioned tool or Linux itself aggregates somehow CPU and GPU activity under a single value?
Note that I'm already aware about the existence of specific tools to monitor GPU activity (e.g. like nvidia-smi for nvidia cards, which in this specific case I use to confirm GPU activity) but I'm not interested in measuring that: I'm more interested in confirming if CPU might be effectively involved in the process or not.
Thanks in advance everyone.