Port Proc_rqrd Error on Brocade 6510

We have two Brocade 6510 SAN switches. I was just monitoring the ports and it showed Proc_rqrd was more than 2500 yesterday. I cleared it, today it's showing 300 again. I was checking on Brocade community not much helpful.

Can you pls tell me why exactly this Error is generated and how this can be mitigated ??

Thanks in advance.

admin> portshow 0
portIndex: 0
portName: port0
portHealth: HEALTHY

Authentication: None
portDisableReason: None
portCFlags: 0x1
portFlags: 0x24b03 PRESENT ACTIVE F_PORT G_PORT LOGICAL_ONLINE LOGIN NOELP LED ACCEPT FLOGI
LocalSwcFlags: 0x0
portType: 24.0
POD Port: Port is licensed
portState: 1 Online
Protocol: FC
portPhys: 6 In_Sync portScn: 32 F_Port
port generation number: 6738
state transition count: 261

portId: 0a0000
portIfId: 43020000
portWwn: 20:00:c4:f5:7c:a7:49:62
portWwn of device(s) connected:
51:40:2e:c0:00:f1:92:98
Distance: normal
portSpeed: 16Gbps

FEC: Inactive
Credit Recovery: Inactive
Aoq: Inactive
FAA: Inactive
F_Trunk: Inactive
LE domain: 0
Peer beacon: Off
FC Fastwrite: OFF
Interrupts: 0 Link_failure: 0 Frjt: 0
Unknown: 0 Loss_of_sync: 0 Fbsy: 0
Lli: 0 Loss_of_sig: 0
Proc_rqrd: 609063 Protocol_err: 0
Timed_out: 0 Invalid_word: 0
Tx_unavail: 0 Invalid_crc: 0
Delim_err: 0 Address_err: 0
Lr_in: 0 Ols_in: 0
Lr_out: 0 Ols_out: 0