Technical Reference: Kernel and Subsystems, Volume 1

krs_getassociativity Subroutine

Purpose

Gets the hardware associativity values for a resource.

Syntax

#include <sys/rset.h>
int krs_getassociativity (type, id, assoc_array, array_size)
unsigned int type;
unsigned int id;
unsigned int *assoc_array;
unsigned int array_size;

Description

The krs_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 krs_getinfo, krs_getrad, and krs_numrads subroutines are provided for typical applications to discover system hardware topology.

The calling process must have root authority to get hardware associativity values.

Parameters

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.

Return Values

Upon successful completion, the krs_getassociativity subroutine returns a 0. 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, one or more of the following are returned:

EINVAL	One of the following occurred: The array_size parameter was specified as 0. An invalid type parameter was specified.
ENODEV	The resource specified by the id parameter does not exist.
EFAULT	Invalid address.
EPERM	The calling process does not have root authority.

Related Information

krs_getinfo Subroutine, krs_getrad Subroutine, and krs_numrads Subroutine.