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PMCCNTSR, PMU Cycle Counter Snapshot Register

The PMCCNTSR is a captured copy of PMCCNTR_EL0.

Once it is captured, the value in PMCCNTSR is unaffected by writes to PMCCNTR_EL0 and PMCR_EL0.C.


There are no configuration notes.

Usage constraints

Any access to PMCCNTSR returns an error if any of the following occurs:

  • The core power domain is off.
  • DoubleLockStatus() == TRUE.
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