I have about 90 systems CPU mining on Ubuntu with xmr-stak-cpu compiled. Basically I made a master copy of a flash drive that I compiled xmr-stak-cpu on, configured it, and then cloned it to the other 89 drives using Clonezilla. I've constantly run into errors like 'memory pinned' which I believe are a result of having issues with pages and largepages. None of the drives have swap space as I noted today. This is a weird result of having installed Ubuntu on a USB drive. This could explain the reason why I've never been able to get largepages to not throw errors like that one. I've also had the phenomenon of Ubuntu freezing after about 2 days of mining, even though my pool still reports the system as mining, albeit at an ever depreciating rate.
Any ideas as to if the swap space is really necessary and/or if this memory pinned error is a concern? Could it explain the declining mining rate over time? Would my hashrate improve/stability improve if a swap file or partition was added>?
I'm getting about 1250H/s mining on 4 x E7-8867L Xeons (10 cores, 20 threads, 30MB L3 cache each), which seems quite slow given I can run them with 15 threads each (60 threads for all 4 CPU's on the same system)