Once I discovered on the graphs a large burst of Multicast packets on one of the ports of the Cisco Nexus 3064 switch, while the CPU load increased to 30%, before that it was 12% with L2 traffic of 13 Gbit/s.
An example of a command to view the processor load:
show proc cpu history
To solve the problem with multicast flooding, I selected the required port and blocked unknown multicast traffic, and if necessary, you can block unknown unicast traffic:
interface ethernet 1/28 switchport block multicast switchport block unicast
After that, the CPU load returned to its previous value, but the multicast packet counters showed that the flood comes to the port, but does not affect the switch CPU.
You can also limit multicast traffic:
interface ethernet 1/28 storm-control multicast level 0.01