Re: Failed to connect to 171.64.65.99
Posted: Tue Aug 02, 2016 8:47 pm
Setting the number of CPUs to 8 (or anything else except -1) overrides the automatic selection process. It should still run with, say 3 GPUs but it will be inefficient since the system cannot provide the required resources to process 11 concurrent processes of (almost) 11*100%.
Forgetting the GPUs for a moment, you could configure two CPU slots, each using 8 CPUs, but all 16 tasks will be competing for the same 8 CPUs, causing each process to run less than 50% of the time. FAH thrives on CPUs that are available close to 100% of the time. It does slow down whenever something else needs the CPU. Browsing the web (for example) when all CPUs are busy with FAH will interrupt a task or two, but it quickly relinquishes the CPU so the total amount of time lost from processing FahCore_* won't add up to enough to matter.
The code associated with the CPU slot factors the number of CPUs configured into the x, y, and z directions.
14 is not prime, but 7x2x1 contains the factor 7 which means that in one direction, the analysis with 14 is as unreliable as using 7. Nine is not prime, but 3x3x1 contains no factor greater than 3 so it's much more reliable than 7.
Forgetting the GPUs for a moment, you could configure two CPU slots, each using 8 CPUs, but all 16 tasks will be competing for the same 8 CPUs, causing each process to run less than 50% of the time. FAH thrives on CPUs that are available close to 100% of the time. It does slow down whenever something else needs the CPU. Browsing the web (for example) when all CPUs are busy with FAH will interrupt a task or two, but it quickly relinquishes the CPU so the total amount of time lost from processing FahCore_* won't add up to enough to matter.
The code associated with the CPU slot factors the number of CPUs configured into the x, y, and z directions.
14 is not prime, but 7x2x1 contains the factor 7 which means that in one direction, the analysis with 14 is as unreliable as using 7. Nine is not prime, but 3x3x1 contains no factor greater than 3 so it's much more reliable than 7.