perfstat_disk_total Interface
The perfstat_disk_total interface returns a perfstat_disk_total_t structure, which is defined in the libperfstat.h file.
Selected fields from the perfstat_disk_total_t structure include:
Several other disk-related metrics, such as number of blocks read from and written to disk,
are also returned. For a complete list, see the perfstat_disk_total_t section in the libperfstat.h header
file in Files Reference.
| Item | Descriptor |
|---|---|
| number | Number of disks |
| size | Total disk size (in MB) |
| free | Total free disk space (in MB) |
| xfers | Total transfers to and from disk (in KB) |
The following code shows an example of how perfstat_disk_total is
used:
#include <stdio.h>
#include <libperfstat.h>
int main(int argc, char* argv[]) {
perfstat_disk_total_t dinfo;
int rc;
rc = perfstat_disk_total(NULL, &dinfo, sizeof(perfstat_disk_total_t), 1);
if (rc != 1)
{
perror("perfstat_disk_total");
exit(-1);
}
perfstat_disk_total(NULL, &dinfo, sizeof(perfstat_disk_total_t), 1);
printf("Total disk statistics\n");
printf("---------------------\n");
printf("number of disks : %d\n", dinfo.number);
printf("total disk space : %llu\n", dinfo.size);
printf("total free space : %llu\n", dinfo.free);
printf("number of transfers : %llu\n", dinfo.xfers);
printf("number of blocks written : %llu\n", dinfo.wblks);
printf("number of blocks read : %llu\n", dinfo.rblks);
}This program produces output such as the following:
Total disk statistics
---------------------
number of disks : 3
total disk space : 4296
total free space : 2912
number of transfers : 77759
number of blocks written : 738016
number of blocks read : 363120