linux 获取CPU个数
#include<stdio.h> #include<unistd.h> int main() { int cpu_num; cpu_num = sysconf(_SC_NPROCESSORS_CONF); printf("_SC_NPROCESSORS_CONF=%d\n",cpu_num); cpu_num = sysconf(_SC_NPROCESSORS_ONLN); printf("_SC_NPROCESSORS_ONLN=%d\n",cpu_num); return 0; } /* * - _SC_NPROCESSORS_CONF * The number of processors configured. * * - _SC_NPROCESSORS_ONLN * The number of processors currently online (available). */