I'm not seeing any performance issues on Ubuntu Server 16.04.4.  I am seeing performance increases however.  Rig seems just as stable and CPU usage appears the same on DSTM 0.6.1 as it did on previous versions.

Eight GTX 1070Ti @ ~505 Sol/s each for a total of ~4050 Sol/s for the entire rig.

Cards are undervolted/underpowered via Nvidia-SMI and overclocked as per the norm for the 1070TIs.