Crate tick_counter

Hardware-based tick counters for high-precision benchmarks

• x86_64 - executes RDTSC CPU instruction to read the time-stamp counter.
• AArch64 - reads value of the CNTVCT_EL0 counter-timer register.

Basic usage

 use tick_counter::*;
 let start = tick_counter_start();
 // ... lines of code to benchmark
 let elapsed_ticks = tick_counter_stop() - start;
 println!("Number of elapsed ticks: {}", elapsed_ticks);

Enums

• TickCounterFrequencyBase
  Enum for determining the base of the privided counter frequency

Functions

• tick_counter_frequency
  Returns frequency of tick counter in HZ.
• tick_counter_precision_nanoseconds
  Returns a precision of tick counters in nanoseconds
• tick_counter_start
  Returns a current value of the tick counter to use as a staring point
• tick_counter_stop
  Returns a current value of the tick counter to use as a stopping point
• x86_64_measure_tick_counter_frequency
  Returns a measured value of tick counter frequency on x86_64 architecture
• x86_64_tick_counter
  Returns a current value of the tick counter based on Intel CPU’s RDTSC instruction
• x86_64_tick_counter_processor_id
  Returns a tick counter and CPUID values based on Intel CPU’s RDTSCP instruction