What is the CPU cache values on KVM guest ?

Solution Verified - Updated -

Issue

  • The cpu cache information in /proc/cpuinfo is different between a KVM host and its guest

    ##### on the host/hypervisor
[user@hypervisor ~]$ grep -m 1 "cache size" /proc/cpuinfo
cache size      : 22528 KB
##### on the guest/VM
[user@kvmguest ~]$ grep -m 1 "cache size" /proc/cpuinfo
cache size      : 16384 KB

  • Is the information listed on the vCPU accurate and, if so, are there are any caching configuration options?

Environment

  • Red Hat Enterprise Linux [ALL]
  • KVM guest

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