Red Hat ENTERPRISE LINUX 5 - VIRTUALIZATION GUIDE Przewodnik Instalacji Pobierz pdf (Strona 196)

Chapter 24. Miscellaneous administration tasks

186

Identifying CPU and NUMA topology

The first step in deciding what policy to apply is to determine the host’s memory and CPU topology.

The virsh nodeinfo command provides information about how many sockets, cores and

hyperthreads there are attached a host.

# virsh nodeinfo

CPU model: x86_64

CPU(s): 8

CPU frequency: 1000 MHz

CPU socket(s): 2

Core(s) per socket: 4

Thread(s) per core: 1

NUMA cell(s): 1

Memory size: 8179176 kB

This system has eight CPUs, in two sockets, each processor has four cores.

The output shows that that the system has a NUMA architecture. NUMA is more complex and requires

more data to accurately interpret. Use the virsh capabilities to get additional output data on the

CPU configuration.

# virsh capabilities

<host>

<cpu>

</cpu>

<migration_features>

<live/>

<uri_transports>

<uri_transport>tcp</uri_transport>

</uri_transports>

</migration_features>

</cpus>

</cell>

</cpus>

</cell>

</cells>

</topology>

<model>selinux</model>

</secmodel>

</host>

[ Additional XML removed ]

</capabilities>

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Red Hat ENTERPRISE LINUX 5 - VIRTUALIZATION GUIDE Przewodnik Instalacji Strona 196