sched_getcpu(3)

1SCHED_GETCPU(3)            Linux Programmer's Manual           SCHED_GETCPU(3)
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NAME

6       sched_getcpu - determine CPU on which the calling thread is running
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SYNOPSIS

9       #include <sched.h>
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11       int sched_getcpu(void);
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13   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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15       sched_getcpu():
16           Since glibc 2.14:
17               _GNU_SOURCE
18           Before glibc 2.14:
19               _BSD_SOURCE || _SVID_SOURCE
20                   /* _GNU_SOURCE also suffices */
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DESCRIPTION

23       sched_getcpu()  returns  the  number  of  the  CPU on which the calling
24       thread is currently executing.
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RETURN VALUE

27       On success, sched_getcpu() returns a nonnegative CPU number.  On error,
28       -1 is returned and errno is set to indicate the error.
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ERRORS

31       ENOSYS This kernel does not implement getcpu(2).
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VERSIONS

34       This function is available since glibc 2.6.
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CONFORMING TO

37       sched_getcpu() is glibc specific.
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NOTES

40       The call
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42           cpu = sched_getcpu();
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44       is equivalent to the following getcpu(2) call:
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46           int c, s;
47           s = getcpu(&c, NULL, NULL);
48           cpu = (s == -1) ? s : c;
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COLOPHON

54       This  page  is  part of release 3.53 of the Linux man-pages project.  A
55       description of the project, and information about reporting  bugs,  can
56       be found at http://www.kernel.org/doc/man-pages/.
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60Linux                             2013-04-17                   SCHED_GETCPU(3)