sched_getcpu(3) Library Functions Manual sched_getcpu(3) NAME sched_getcpu - determine CPU on which the calling thread is running LIBRARY Standard C library (libc, -lc) SYNOPSIS #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 */ DESCRIPTION sched_getcpu() returns the number of the CPU on which the calling thread is currently executing. RETURN VALUE On success, sched_getcpu() returns a nonnegative CPU number. On error, -1 is returned and errno is set to indicate the error. ERRORS ENOSYS This kernel does not implement getcpu(2). VERSIONS This function is available since glibc 2.6. ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(7). ┌────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├────────────────────────────────────────────┼───────────────┼─────────┤ │sched_getcpu() │ Thread safety │ MT-Safe │ └────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS sched_getcpu() is glibc-specific. NOTES 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; SEE ALSO getcpu(2), sched(7) Linux man-pages 6.03 2022-12-15 sched_getcpu(3)
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