"suspends" count on pfctl -vvsq

      Good time of day,

   pfctl -vvsq shows counter, named "suspends", what specific events
it counts ?

I just tryin' to understand what it means:

queue root_pcn1 bandwidth 50Mb priority 0 cbq( wrr root ) {stub}
  [ pkts:     668486  bytes:  115633409  dropped pkts:      0 bytes:      0 ]
  [ qlength:   0/ 50  borrows:      0  suspends:      0 ]
  [ measured:   703.2 packets/s, 1.03Mb/s ]
queue  stub bandwidth 30Mb qlimit 5000 cbq( borrow default )
  [ pkts:     668486  bytes:  115633409  dropped pkts:      0 bytes:      0 ]
  [ qlength:   0/5000  borrows:      0  suspends:  65311 ]
  [ measured:   703.2 packets/s, 1.03Mb/s ]
queue root_pcn0 bandwidth 100Mb priority 0 cbq( wrr root ) {stub}
  [ pkts:     773002  bytes:  654654161  dropped pkts:      0 bytes:      0 ]
  [ qlength:   0/ 50  borrows:      0  suspends:      0 ]
  [ measured:   785.9 packets/s, 5.35Mb/s ]
queue  stub bandwidth 30Mb qlimit 5000 cbq( borrow default )
  [ pkts:     773002  bytes:  654654161  dropped pkts:      0 bytes:      0 ]
  [ qlength:   0/5000  borrows:   2607  suspends:  56563 ]
  [ measured:   785.9 packets/s, 5.35Mb/s ]

i.e. speed rates is good, but suspends (dequeuing stalls ?) with
empty queues looks strange for me.

  I can guess, possible _cause_ of such behavior - host is runninig on
virtual hardware under VMWare Hypervisor, but can't understand the
_process_ itself.

Kind regards,

Ilya A. Kovalenko