The LPAR within which the Linux® instance runs must
be authorized to use the CPU-measurement counter sets or sampling
modes. Use the HMC or SE to authorize the LPAR.
About this task
The details of the steps in this task can differ,
depending on your hardware. For more information, see the Support
Element Operations Guide for your mainframe system.
Procedure
Perform these steps on the HMC or SE to grant authorizations:
- Navigate to the LPAR for which you want to grant authorizations.
- Within the LPAR profile, select the Security page.
-
Within the counter facility options, select each counter set you want to use. The coprocessor
group counter set is not supported by Linux on IBM® Z.
- If you want to use the sampling facility, select the basic
sampling mode within the sampling facility options.
Note: You cannot enable the diagnostic mode unless it has been enabled for you by IBM Support.
- Click Save.
What to do next
Deactivate, activate, and IPL the LPAR to make the authorization
take effect. For more information, see the Support Element Operations
Guide for your mainframe system. When your Linux instance is available again, you can
use the lscpumf command to confirm that the authorizations
are in place.