Functions¶

C¶

• function clock_elapsed(uint64_t) Returns the elapsed time in seconds since start_time, based on clock_now .
• function clock_frequency() Returns the number of ticks per second for the clock used in clock_now().
• function clock_now() Returns the current value of the OS's highest-resolution monotonic clock. On modern hardware, these typically map to hardware instructions (RDTSC/CNTVCT_EL0) via user-mode shared pages, avoiding a heavy syscall context switch.

G¶

• function get_cpu() Returns the CPU instruction set selected for use at runtime.

M¶

• function measure_rdtsc_cycle_time() Measures and returns the estimated cycle time in nanoseconds per tick for rdtsc.

O¶

• function override_cpu(cpu_t) Overrides the CPU instruction set used by KFR at runtime.

R¶

• function rdtsc() Reads the processor's cycle counter.

S¶

• function steady_time() Returns the current time in nanoseconds since epoch using steady_clock.