The background coroutine for maintaining RCQP seems cannot be found

[LiuMicheal]

The KRCORE paper describes

"Background RCQP creations. To increase the likelihood of hitting an RCQP in the pool, KRCORE maintains background routines to sample frequently communicated nodes, create RCQPs for frequently communicated ones in the HybridQP P ool and reclaim rarely used RCQPs. Currently, we choose a simple LRU strategy for the reclamation.”

However, looking through the code, I can't seem to find where these routines are being created. Can someone help point me to the function that creates these routines?