Struct TscTimestamp 

pub struct TscTimestamp(pub u64);

High-precision timestamp using TSC

Tuple Fields

0: u64

Implementations

impl TscTimestamp

pub fn now() -> Self

Read current TSC timestamp.

• x86_64: RDTSC — bias 0, latency a few cycles.
• aarch64: CNTVCT_EL0 (the virtual count register) — same wall-clock semantics as RDTSC but at the system counter frequency (typically 24 MHz on Apple Silicon, exposed via CNTFRQ_EL0). Callers must pass the right tsc_freq_hz to nanos_since for portability.
• other: fall back to Instant::now() so the crate still compiles on wasm32 / riscv64 / etc. The returned u64 is nanoseconds since program start, and nanos_since should be called with tsc_freq_hz = 1_000_000_000 on these targets.

pub fn nanos_since(&self, other: TscTimestamp, tsc_freq_hz: u64) -> u64

Calculate nanoseconds since another timestamp

pub fn add_nanos(&self, nanos: u64, tsc_freq_hz: u64) -> Self

Add nanoseconds to timestamp

Trait Implementations

impl Clone for TscTimestamp

fn clone(&self) -> TscTimestamp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TscTimestamp

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

Formats the value using the given formatter.

impl Ord for TscTimestamp

fn cmp(&self, other: &TscTimestamp) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for TscTimestamp

fn eq(&self, other: &TscTimestamp) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for TscTimestamp

fn partial_cmp(&self, other: &TscTimestamp) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for TscTimestamp

impl Eq for TscTimestamp

impl StructuralPartialEq for TscTimestamp