New PC for mining:

AMD Ryzen 1600 CPU
ASRock AB350 Pro 4 Mobo
PowerColor Red Devil RX 580 8GB GPU
4GB Crucial DDR4 RAM
1TB WD Blue SATA HD
EVGA 750W 80+ Platinum PSU
Ubuntu 16.04

First time mining, first time using Linux...

Using XMR-STAK-CPU to mine Monero... With the CPU only, initially the highest I was getting was 220 H/s +/-. After changing the config for the threads now I get high of 452 H/s. And after OC Ryzen to to 3700MHz (stock cooling) I got a high of 502 H/s.

However I am getting an error when running the miner "MEMORY ALLOC FAILED: mlock failed"

Any ideas how to fix it? Thanks!