ios获取内核数目

#include <mach/mach_host.h>

unsigned int countCores()
{
    host_basic_info_data_t hostInfo;
    mach_msg_type_number_t infoCount;

    infoCount = HOST_BASIC_INFO_COUNT;
    host_info(mach_host_self(), HOST_BASIC_INFO, 
              (host_info_t)&hostInfo, &infoCount);

    return (unsigned int)(hostInfo.max_cpus);
}

#include <sys/sysctl.h>

unsigned int countCores()
{
    size_t len;
    unsigned int ncpu;

    len = sizeof(ncpu);
    sysctlbyname ("hw.ncpu",&ncpu,&len,NULL,0);

    return ncpu;
}

 参考地址:http://stackoverflow.com/questions/7241936/how-do-i-detect-a-dual-core-cpu-on-ios