sysmgr_runstate(), sysmgr_runstate_dynamic()

#include <sys/sysmgr.h>

int sysmgr_runstate( unsigned cpu,
                     int enable );

int sysmgr_runstate_dynamic( unsigned cpu,
                             int enable );

Arguments:

cpu

The index of the CPU whose state you want to change.

enable

0 to turn the processor off; non-zero to turn it on. For more details, see below.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The sysmgr_runstate() and sysmgr_runstate_dynamic() functions turn the specified CPU on or off as follows:

• sysmgr_runstate() takes a CPU down manually (if enable is zero) or lets it run (if one).
• sysmgr_runstate_dynamic() lets the kernel dynamically bring a CPU up or down (if enable is one), depending on the system load.

These settings work together:

Errors:

EINVAL

The CPU index is invalid.

EOK

Success.

EPERM

The calling process doesn't have the required permission; see procmgr_ability().

Classification:

QNX Neutrino