- May 29, 2013
- Asus Z370-G Gaming (Wi-Fi AC)
- i9-9900K OC'd @ 5.0GHz
- RX 6600 XT
- Classic Mac
- Mobile Phone
I understand that the ram disk might be a way to test this, but my knowledge of how memory management on Unix-like systems works tells me that wired memory is guaranteed not to be swapped out, and must only reside in physical RAM, and at the specific address it is currently mapped into. The OS itself uses this for buffers it will be sending to hardware to DMA into, for instance. It ensures the memory doesn't get swapped out (which would crash a DMA operation) or whatnot, and it cannot be compressed.
It's a small little tool, easily installed with "brew install memtester", and run like "memtester 50G"
I spent over 2 hours completing one loop of memtester. I'm not going to waste any more time. All the RAM is there.