Thread was paused to adjust interleaving
Ubuntu 16.04.5, amdgpu-pro blockchain drivers 17.40, newest xmrig-amd compiled from git, 4x RX470. Seems to work, but I get a lot of messages concerning paused threads. What does that mean?

[2019-01-17 05:02:47] new job from eu.turtlepool.space:5555 diff 91755 algo cn-lite/1
[2019-01-17 05:02:47] accepted (14/0) diff 59258 (79 ms)
[2019-01-17 05:02:47] Thread #4 was paused for 329 ms to adjust interleaving
[2019-01-17 05:02:50] Thread #5 was paused for 200 ms to adjust interleaving
[2019-01-17 05:02:53] Thread #5 was paused for 284 ms to adjust interleaving
[2019-01-17 05:02:53] Thread #0 was paused for 247 ms to adjust interleaving
[2019-01-17 05:02:54] speed 10s/60s/15m 7610.7 7611.4 n/a H/s max 7717.0 H/s