High CPU on ICX7450 running 09.0.10f

[frnkblk]

Last night we experienced several systems on our three-member ICX7450 stack:

• alarms about BGP sessions bouncing
• could not SSH in via inband or OOB interfaces
• received alerts from some attached devices that some LACP-enabled LAGs bounced a few times
• SNMP-based graphs were not 
• ICMP-based pings timed our had high latency

Everything pointed to a high CPU.

We failed to get proper serial interface in place, so we power cycled unit #1 and then took the opportunity to upgrade from 09.0.10c to 09.0.10f. Unfortunately a few hours later we lost SSH, saw ICMP ping failures, and SNMP-based graphing, though we haven't seen any BGP sessions bouncing.

Via the serial interface we could see CPU 0 was high, and these are the processes that high:

2564 root -20 1 678.8m 381.2m 8.0 19.1 48:00.38 R `- bcmINTR
2703 root 26 6 678.8m 381.2m 36.0 19.1 44:34.67 S `- bcmCNTR.0
2742 root 21 1 678.8m 381.2m 12.0 19.1 41:20.12 R `- bcmRX
2807 root -18 6 678.8m 381.2m 28.6 19.1 131:01.63 R `- ZMQbg/1
2988 root 26 6 678.8m 381.2m 16.0 19.1 89:58.03 S `- os_pkt_intx_tx

Best guess is that something is hitting the CPU pretty hard.

Is there a way to see what packets are hitting the CPU?