如何使用SNMP找出CPU数量

Question

Is there a way to get the number of CPUs using SNMP in linux + net-snmp package (with the default net-snmp package mibs installed)?

UC Davis SNMP mib provides a lot of CPU information, but I do not see an object for the number of CPUs.

Answer 1

Depends on the implementation, but the HOST-RESOURCES-MIB hrDevice.hrDeviceTable should contain entries for the number of CPUs.

OID: .1.3.6.1.2.1.25.3.2

Any devices in the table matching:

hrDeviceType: .1.3.6.1.2.1.25.3.1.3

indicates a CPU/Core/HyperThread

There is also the HOST-RESOURCES::hrDevice.hrProcessorTable table, which should indicate their firmware ID's, which should help you differentiate cores/hyperthreads from physical cpus.