@ebin-dev can you confirm your box crashed before completing this program: cpufreq-switching-2.c #include <stdio.h> #include <stdint.h> #include <stdlib.h> #include <string.h> #include <fcntl.h> #include <malloc.h> #include <unistd.h> #include <sys/mman.h> #define MAIN_LOOPS (100) #define TRIALS_PER_TOGGLE (10) #define MAX_MEGS (64) #define CPUL 0 #define CPUB 1 const char *cpul_freqs[] = { "408000", "600000", "816000", "1008000",