Get the memory at each node in a NUMA system.

numa-memory-at-each-node.c

#include <numa.h>
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char **argv){

   long free;
   int num_cpus = 4;
   long node_size = -1L;
   int i;

   if(numa_available() == -1){
      printf("ERROR : Numa not available on the system\n");
      return EXIT_FAILURE;
   }
   num_cpus = numa_num_configured_cpus();
   if(numa_num_configured_nodes() != num_cpus){
      printf("INFO : The number of thread nodes [%d] is different from the number of thread CPUs [%d]\n",
             numa_num_configured_nodes(),
             num_cpus);
   } else {
      printf("INFO : The number of thread nodes and thread CPUs is [%d]\n",
             num_cpus);
   }
   for(i=0;i<num_cpus; i++){
      node_size = numa_node_size(i, &amp;free);
      printf("INFO : CPU [%d] : Memory Available [%ld] MB, Free Memory [%ld] MB\n",
              i, node_size/(1024*1024), free/(1024*1024));
   }

   return EXIT_SUCCESS;
}