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sched_getcpu(3) Library Functions Manual sched_getcpu(3)
sched_getcpu - determine CPU on which the calling thread is running
Standard C library (libc, -lc)
#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).
For an explanation of the terms used in this section, see attributes(7). ┌──────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├──────────────────────────────────────┼───────────────┼─────────┤ │sched_getcpu() │ Thread safety │ MT-Safe │ └──────────────────────────────────────┴───────────────┴─────────┘
GNU.
glibc 2.6.
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)
Linux man-pages 6.04 2023-03-30 sched_getcpu(3)
Pages that refer to this page: getcpu(2), sched_setaffinity(2), pthread_setaffinity_np(3), sched(7)