Very Computer

Solaris 10
gcc 3.4.5 (blastwave package)

The following code works fine when compiled with -m32.  However, when
compiled with -m64 the load average values are totally wonky (as in
huge, wrong numbers).  I tinkered with changing the cast, but that
didn't seem to matter.  Any ideas?

/* loadavgtest.c
 *
 * Built with gcc -Wall -lkstat -m64 loadavgtest.c -o loadavgtest
 */
#include <stdio.h>
#include <kstat.h>

int main(){
   kstat_ctl_t* kc;
   kstat_t* ksp;
   kstat_named_t* kn1;
   kstat_named_t* kn5;
   kstat_named_t* kn15;

   kc = kstat_open();

   if(kc == 0){
      printf("kstat_open() error\n");
      return -1;
   }

   ksp = kstat_lookup(kc, "unix", 0, "system_misc");

   if(ksp == 0){
      printf("kstat_lookup() error\n");
      return -1;
   }

   if(kstat_read(kc,ksp,0) == -1){
      printf("kstat_read() error\n");
      return -1;
   }

   kn1  = kstat_data_lookup(ksp, "avenrun_1min");
   kn5  = kstat_data_lookup(ksp, "avenrun_5min");
   kn15 = kstat_data_lookup(ksp, "avenrun_15min");

   if( (kn1 == 0) || (kn5 == 0) || (kn15 == 0) ){
      printf("kstat_lookup() error\n");
      return -1;
   }

   printf("1 val: %f\n", (double)kn1->value.ul/256);
   printf("5 val: %f\n", (double)kn1->value.ul/256);
   printf("15 val: %f\n", (double)kn1->value.ul/256);

   return 0;

Quote:}

Dan

Quote:

> The following code works fine when compiled with -m32.  However, when
> compiled with -m64 the load average values are totally wonky (as in
> huge, wrong numbers).  I tinkered with changing the cast, but that
> didn't seem to matter.  Any ideas?

...
>    kn1  = kstat_data_lookup(ksp, "avenrun_1min");
>    kn5  = kstat_data_lookup(ksp, "avenrun_5min");
>    kn15 = kstat_data_lookup(ksp, "avenrun_15min");
...
>    printf("1 val: %f\n", (double)kn1->value.ul/256);
>    printf("5 val: %f\n", (double)kn1->value.ul/256);
>    printf("15 val: %f\n", (double)kn1->value.ul/256);

And they're all uint32_t, so get them as

value.ui32

instead of the variable length ul.

Alternatively, why not just call getloadavg(), if all you want are the
load averages?

--
-Peter Tribble
L.I.S., University of Hertfordshire - http://www.herts.ac.uk/
http://www.petertribble.co.uk/ - http://ptribble.blogspot.com/

Quote:> And they're all uint32_t, so get them as

> value.ui32

> instead of the variable length ul.

Quote:> Alternatively, why not just call getloadavg(), if all you want are the
> load averages?

Thanks again.

Dan