09-05-2010
By locked processor do you mean modifying the "multipler value" of the processor with the "base clock" value? Only if the multiplier value cannot be modified its known as locked processor. Not sure, whether there is any way to simulate that or determine it programmatically. Am interested to see answers from other experts here about this question.
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LEARN ABOUT XFREE86
get_nprocs_conf
GET_NPROCS(3) Linux Programmer's Manual GET_NPROCS(3)
NAME
get_nprocs, get_nprocs_conf - get number of processors
SYNOPSIS
#include <sys/sysinfo.h>
int get_nprocs(void);
int get_nprocs_conf(void);
DESCRIPTION
The function get_nprocs_conf() returns the number of processors configured by the operating system.
The function get_nprocs() returns the number of processors currently available in the system. This may be less than the number returned by
get_nprocs_conf() because processors may be offline (e.g., on hotpluggable systems).
RETURN VALUE
As given in DESCRIPTION.
ATTRIBUTES
For an explanation of the terms used in this section, see attributes(7).
+------------------+---------------+---------+
|Interface | Attribute | Value |
+------------------+---------------+---------+
|get_nprocs(), | Thread safety | MT-Safe |
|get_nprocs_conf() | | |
+------------------+---------------+---------+
CONFORMING TO
These functions are GNU extensions.
NOTES
The current implementation of these functions is rather expensive, since they open and parse files in the /sys filesystem each time they
are called.
The following sysconf(3) calls make use of the functions documented on this page to return the same information.
np = sysconf(_SC_NPROCESSORS_CONF); /* processors configured */
np = sysconf(_SC_NPROCESSORS_ONLN); /* processors available */
EXAMPLE
The following example shows how get_nprocs() and get_nprocs_conf() can be used.
#include <stdlib.h>
#include <stdio.h>
#include <sys/sysinfo.h>
int
main(int argc, char *argv[])
{
printf("This system has %d processors configured and "
"%d processors available.
",
get_nprocs_conf(), get_nprocs());
exit(EXIT_SUCCESS);
}
SEE ALSO
nproc(1)
COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
GNU
2017-09-15 GET_NPROCS(3)