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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | VERSIONS | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON |
SCHED_GETCPU(3) Linux Programmer's Manual SCHED_GETCPU(3)
sched_getcpu - determine CPU on which the calling thread is running
#include <sched.h>
int sched_getcpu(void);
Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
sched_getcpu():
Since glibc 2.14:
_GNU_SOURCE
Before glibc 2.14:
_BSD_SOURCE || _SVID_SOURCE
/* _GNU_SOURCE also suffices */
sched_getcpu() returns the number of the CPU on which the calling
thread is currently executing.
On success, sched_getcpu() returns a nonnegative CPU number. On
error, -1 is returned and errno is set to indicate the error.
ENOSYS This kernel does not implement getcpu(2).
This function is available since glibc 2.6.
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────┬───────────────┬─────────┐
│Interface │ Attribute │ Value │
├───────────────┼───────────────┼─────────┤
│sched_getcpu() │ Thread safety │ MT-Safe │
└───────────────┴───────────────┴─────────┘
sched_getcpu() is glibc-specific.
The call
cpu = sched_getcpu();
is equivalent to the following getcpu(2) call:
int c, s;
s = getcpu(&c, NULL, NULL);
cpu = (s == -1) ? s : c;
getcpu(2), sched(7)
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latest version of this page, can be found at
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Linux 2017-09-15 SCHED_GETCPU(3)
Pages that refer to this page: getcpu(2) , sched_getaffinity(2) , sched_setaffinity(2) , pthread_getaffinity_np(3) , pthread_setaffinity_np(3) , sched(7)
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