processor_info(2)

NAME

processor_info − determine type and status of a processor

SYNOPSIS

#include <sys/types.h>
#include <sys/processor.h>

int processor_info(processorid_t processorid, processor_info_t ∗infop);

DESCRIPTION

The status of the processor specified by processorid is returned in the processor_info_t structure pointed to by infop.

The structure contains the following members:

intpi_state;/∗ P_ONLINE or P_OFFLINE∗/
charpi_processor_type[PI_TYPELEN];
charpi_fputypes[PI_FPUTYPE];
intpi_clock;/∗ CPU clock freq in MHz ∗/

The fields have the following meanings:

pi_state is the current state of the processor, either P_ONLINE or P_OFFLINE.

pi_processor_type is a NULL-terminated ASCII string specifying the type of the processor.

pi_fputypes is a NULL-terminated ASCII string containing the comma-separated types of floating-point units (FPUs) attached to the processor. This string will be empty if no FPU is attached.

pi_clock is the processor clock frequency rounded to the nearest megahertz. It may be 0 if not known.

RETURN VALUES

processor_info returns 0 if successful. Otherwise -1 is returned and errno is set to reflect the error.

ERRORS

EINVAL An non-existent processor ID was specified.

EFAULT The processor_info_t structure pointed to by infop was not writable by the user.

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