[−][src]Function safe_arch::read_timestamp_counter_p

pub fn read_timestamp_counter_p(aux: &mut u32) -> u64

Reads the CPU's timestamp counter value and store the processor signature.

This works similar to read_timestamp_counter with two main differences:

  • It and also stores the IA32_TSC_AUX MSR value to the reference given.
  • It waits on all previous instructions to finish before reading the timestamp (though it doesn't prevent other instructions from starting).

As with read_timestamp_counter, you can't actually use this to tell the time.

  • Intrinsic: __rdtscp
  • Assembly: rdtscp