vmstatics.c

gistfile1.c

// vim: fileencoding=utf-8 expandtab tabstop=2 shiftwidth=2 :
//
// vmstatics.c
//
// % clang -Wall -o vmstatics vmstatics.c
// % ./vmstatics
// active      1627869184
// inactive    1990959104
// wired       1616474112
// speculative 1243693056
// free        2109575168
// total       8588570624

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <mach/mach.h>

int main(int argc, char **argv)
{
  vm_size_t              page_size;
  mach_port_t            localhost;
  vm_statistics64_data_t vm_stat;
  mach_msg_type_number_t count;
  uint64_t               active, inactive, wired, speculative, free;

  localhost = mach_host_self();

  if(host_page_size(localhost, &page_size) != KERN_SUCCESS) {
    perror("host_page_size");
    exit(EXIT_FAILURE);
  }

  if(host_statistics64(localhost, HOST_VM_INFO64, (host_info64_t)&vm_stat, &count) != KERN_SUCCESS) {
    perror("host_statistics64");
    exit(EXIT_FAILURE);
  }

  active      = vm_stat.active_count      * page_size;
  inactive    = vm_stat.inactive_count    * page_size;
  wired       = vm_stat.wire_count        * page_size;
  speculative = vm_stat.speculative_count * page_size;
  free        = vm_stat.free_count        * page_size - speculative;

//  printf("page size   %u\n", (uint32_t)page_size);
  printf("active      %llu\n", active);
  printf("inactive    %llu\n", inactive);
  printf("wired       %llu\n", wired);
  printf("speculative %llu\n", speculative);
  printf("free        %llu\n", free);
  printf("total       %llu\n", active + inactive + wired + speculative + free);

  exit(EXIT_SUCCESS);
}