With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cePfePerfIntervalEfficiency
Cisco Entity Packet Forwarding Engine Performance Interval Efficiency
1.3.6.1.4.1.9.9.265.1.1.3.1.3
The percentage of processor efficiency by the PFE pipeline during this completed 15 min interval. Under normal conditions, this number will be 100 and when efficiency starts degrading, it will start going down until it reaches zero.
Back to CISCO-ENTITY-PFE-MIB MIB page.
IPHost Network monitor allows you to monitor cePfePerfIntervalEfficiency on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.