/****************************************************************************

 * This is a simple low level example for getting information on the system *

 * hardware. This function PAPI_get_hardware_info(), returns a pointer to a *

 * structure of type PAPI_hw_info_t, which contains number of CPUs, nodes,  *

 * vendor number/name for CPU, CPU revision, clock speed.                   *

 ****************************************************************************/

#include <stdio.h>

#include <stdlib.h>

#include "papi.h" /* This needs to be included every time you use PAPI */

int main()

{

   const PAPI_hw_info_t *hwinfo = NULL;

   int retval;

   /*************************************************************************** 

   *  This part initializes the library and compares the version number of the*

   * header file, to the version of the library, if these don't match then it *

   * is likely that PAPI won't work correctly.If there is an error, retval    *

   * keeps track of the version number.                                       *

   ***************************************************************************/

   if((retval = PAPI_library_init(PAPI_VER_CURRENT)) != PAPI_VER_CURRENT )

   {

      printf("Library initialization error! \n");

      exit(1);

   }

   /* Get hardware info*/      

   if ((hwinfo = PAPI_get_hardware_info()) == NULL)

   {

      printf("PAPI_get_hardware_info error! \n");

      exit(1);

   }

   /* when there is an error, PAPI_get_hardware_info returns NULL */

   printf("%d CPU  at %f Mhz.\n",hwinfo->totalcpus,hwinfo->mhz);

   printf(" model string is %s \n", hwinfo->model_string);

   /* clean up */ 

   PAPI_shutdown();

   exit(0);

}