// host_basic_info.c
#include <stdio.h>
#include <stdlib.h>
#include <mach/mach.h>
#define EXIT_ON_MACH_ERROR(msg, retval) if (kr != KERN_SUCCESS) { mach_error(msg ":" , kr); exit((retval)); }
int
main()
{
kern_return_t kr; // the standard return type for Mach calls
host_name_port_t myhost;
kernel_version_t kversion;
host_basic_info_data_t hinfo;
mach_msg_type_number_t count;
char *cpu_type_name, *cpu_subtype_name;
vm_size_t page_size;
// get send rights to the name port for the current host
myhost = mach_host_self();
kr = host_kernel_version(myhost, kversion);
EXIT_ON_MACH_ERROR("host_kernel_version", kr);
count = HOST_BASIC_INFO_COUNT; // size of the buffer
kr = host_info(myhost, // the host name port
HOST_BASIC_INFO, // flavor
(host_info_t)&hinfo, // out structure
&count); // in/out size
EXIT_ON_MACH_ERROR("host_info", kr);
kr = host_page_size(myhost, &page_size);
EXIT_ON_MACH_ERROR("host_page_size", kr);
printf("%s\n", kversion);
// the slot_name() library function converts the specified
// cpu_type/cpu_subtype pair to a human-readable form
slot_name(hinfo.cpu_type, hinfo.cpu_subtype, &cpu_type_name,
&cpu_subtype_name);
printf("cpu %s (%s, type=0x%x subtype=0x%x "
"threadtype=0x%x)\n", cpu_type_name, cpu_subtype_name,
hinfo.cpu_type, hinfo.cpu_subtype, hinfo.cpu_threadtype);
printf("max_cpus %d\n", hinfo.max_cpus);
printf("avail_cpus %d\n", hinfo.avail_cpus);
printf("physical_cpu %d\n", hinfo.physical_cpu);
printf("physical_cpu_max %d\n", hinfo.physical_cpu_max);
printf("logical_cpu %d\n", hinfo.logical_cpu);
printf("logical_cpu_max %d\n", hinfo.logical_cpu_max);
printf("memory_size %u MB\n", (hinfo.memory_size >> 20));
printf("max_mem %llu MB\n", (hinfo.max_mem >> 20));
printf("page_size %u bytes\n", page_size);
exit(0);
}
haidragondeMacBook-Air:6-1 haidragon$ gcc -Wall -o host_basic_info host_basic_info.c
host_basic_info.c:55:43: warning: format specifies type ‘unsigned int‘ but the argument has type
‘vm_size_t‘ (aka ‘unsigned long‘) [-Wformat]
printf("page_size %u bytes\n", page_size);
~~ ^~~~~~~~~
%lu
1 warning generated.
haidragondeMacBook-Air:6-1 haidragon$ ls
host_basic_info host_basic_info.c
haidragondeMacBook-Air:6-1 haidragon$ ./host_basic_info
Darwin Kernel Version 18.2.0: Mon Nov 12 20:24:46 PST 2018; root:xnu-4903.231.4~2/RELEASE_X86_64
cpu x86_64h (Intel x86-64h Haswell, type=0x7 subtype=0x8 threadtype=0x1)
max_cpus 4
avail_cpus 4
physical_cpu 2
physical_cpu_max 2
logical_cpu 4
logical_cpu_max 4
memory_size 2048 MB
max_mem 8192 MB
page_size 4096 bytes
haidragondeMacBook-Air:6-1 haidragon$ 原文地址：https://blog.51cto.com/haidragon/2416417