Purpose
Retrieves
system affinity information.
Library
Standard C
library (libc.a)
Description
The rs_info subroutine
returns affinity system information.
Parameters
| Item |
Description |
| out |
Specifies the address where the affinity request
information is optionally entered and where output information is
returned. |
| command |
Specifies the requested affinity information.
The command parameter has the following values:
- RS_CONTAINING_RAD
- Returns the index number of the resource allocation domain at
the previous (next lower number) system detail level that contains
the resource allocation domain specified by the arg1 and arg2 parameters.
The arg1 parameter specifies the system
detail level number of requested resource allocation domain. The arg2 parameter
specifies the index of the resource allocation domain within the arg1 system
detail level. The *out parameter points
to an unsigned integer that receives the containing resource allocation
domain index.
- RS_SRADID_LOADAVG
- Returns the dispatcher load average for the available CPUs in
a specified SRADID (Scheduler Resource Allocation Domain Identifier).
The arg1 parameter specifies the SRADID
whose load average is requested. The arg2 parameter
specifies the size of the output parameter area provided in the out
parameter. The out parameter points to
the address of a loadavg_info_t structure to receive the output of
the query. The rs_info() subroutine returns the load average
and the number of available CPUs in the SRADID in the loadavg_info_t
structure.
- RS_SRADID_USABLE_LOADAVG
- Returns the dispatcher load average for the available CPUs in
a specified SRADID that can be used by the calling thread. The arg1 parameter
specifies the SRADID whose load average is requested. CPUs in the
specified SRADID that the calling thread cannot use due to process
or thread resource set attachments or system exclusive resource sets
are excluded from the load average calculation. The arg2 parameter
specifies the size of the output parameter area provided in the out parameter.
The out parameter points to the address
of a loadavg_info_t structure to receive the output of the query.
The rs_info() subroutine returns the load average and number
of usable CPUs in the SRADID in the loadavg_info_t structure.
|
| arg1 |
Specifies the parameter information that depends
on the command parameter. |
| arg2 |
Specifies the parameter information
that depends on the command parameter. |
Return Values
If successful,
the requested information is returned. If unsuccessful, a value of
-1 is returned and the errno global variable is set to indicate
the error.
Error Codes
| Item |
Description |
| EFAULT |
The read or write of the *out parameter
is not successful. |
| EINVAL |
One of the following occurred:
- An invalid command argument is specified.
- An invalid arg1 or arg2 parameter
is specified.
|