Gets the hardware associativity values for a resource.
Standard C library (libc.a)
#include <sys/rset.h>
int rs_getassociativity (type, id, assoc_array, array_size)
unsigned int type;
unsigned int id;
unsigned int *assoc_array;
unsigned int array_size;The rs_getassociativity subroutine returns the array of hardware associativity values for a specified resource.
This is a special purpose subroutine intended for specialized root applications needing the hardware associativity value information. The rs_getinfo, rs_getrad, and rs_numrads subroutines are provided for non-root applications to discover system hardware topology.
The calling process must have root authority to get hardware associativity values.
| Item | Description |
|---|---|
| type | Specifies the resource type whose associativity values are requested. The only value supported to retrieve values for a processor is R_PROCS. |
| id | Specifies the logical resource id whose associativity values are requested. |
| assoc_array | Specifies the address of an array of unsigned integers to receive the associativity values. |
| array_size | Specifies the number of unsigned integers in assoc_array. |
If successful, a value of 0 is returned. The assoc_array parameter array contains the resource's associativity values. The first entry in the array indicates the number of associativity values returned. If the hardware system does not provide system topology data, a value of 0 is returned in the first array entry. If unsuccessful, a value of -1 is returned and the errno global variable is set to indicate the error.
| Item | Description |
|---|---|
| EINVAL | One of the following occurred:
|
| ENODEV | The resource specified by the id parameter does not exist. |
| EFAULT | Invalid address. |
| EPERM | The calling process does not have root authority. |