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       #define _GNU_SOURCE
10       #include <utmpx.h>
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12       int sched_getcpu(void);
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14   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):
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16       sched_getcpu(): _BSD_SOURCE || _SVID_SOURCE
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DESCRIPTION

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

23       On success, sched_getcpu()  returns  a  non-negative  CPU  number.   On
24       error, -1 is returned and errno is set to indicate the error.
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ERRORS

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

30       This function is available since glibc 2.6.
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CONFORMING TO

33       sched_getcpu() is glibc specific.
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NOTES

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

50       This  page  is  part of release 3.22 of the Linux man-pages project.  A
51       description of the project, and information about reporting  bugs,  can
52       be found at http://www.kernel.org/doc/man-pages/.
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56Linux                             2008-07-03                   SCHED_GETCPU(3)