Hi!

With several of my l3+ machines i get this error from kernel log
Apr  5 10:36:35 (none) local0.notice cgminer[4548]: [TIMER] Collecting HR started..
Apr  5 10:37:31 (none) local0.notice cgminer[4548]: [TIMER] CHECK HW started..

After this usually the miner is gonna restart and then continues the work.
In some cases it shows it like this
Apr  5 07:42:38 (none) local0.notice cgminer[4548]: Rejected 17467009 Diff 721K/131072 L3 0 pool 0 (prevhash-stale)
Apr  5 10:36:35 (none) local0.notice cgminer[4548]: [TIMER] Collecting HR started..
Apr  5 10:37:31 (none) local0.notice cgminer[4548]: [TIMER] CHECK HW started..

Can you help me to understand what this means.
Thank you!