Enum PerfClock

pub enum PerfClock {
    Default,
    ClockId(ClockId),
}

This allows selecting which internal Linux clock to use when generating timestamps.

Setting a specific ClockId can make it easier to correlate perf sample times with timestamps generated by other tools. For example, when sampling applications which emit JITDUMP information, you’ll usually select the moonotonic clock. This makes it possible to correctly order perf event records and JITDUMP records - those also usually use the monotonic clock.

Variants

Default

The default clock. If this is used, the timestamps in event records are obtained with local_clock() which is a hardware timestamp if available and the jiffies value if not.

In practice, on x86_64 this seems to use ktime_get_ns() which is the number of nanoseconds since boot.

ClockId(ClockId)

A specific clock.

Trait Implementations

impl Clone for PerfClock

fn clone(&self) -> PerfClock

Returns a duplicate of the value.

const fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for PerfClock

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Copy for PerfClock