Yeah performance counters
To fill in the details, here is the code used for the measurement:
https://github.com/lemire/counters/blob/main/include/counter...
It fetches the number of mispredicted instructions from Linux's perf subsystem, which in turn gathers the metrics from CPU's PMU (Performance Monitoring Unit) interface.
alt Hacker News
To fill in the details, here is the code used for the measurement:
https://github.com/lemire/counters/blob/main/include/counter...
It fetches the number of mispredicted instructions from Linux's perf subsystem, which in turn gathers the metrics from CPU's PMU (Performance Monitoring Unit) interface.