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CentOS 7.0 - man page for papi_get_real_nsec (centos section 3)

PAPI_get_real_nsec(3)						       PAPI						     PAPI_get_real_nsec(3)

PAPI_get_real_nsec - Get real time counter value in nanoseconds.
Detailed Description This function returns the total real time passed since some arbitrary starting point. The time is returned in nanoseconds. This call is equivalent to wall clock time. See Also: PAPI_get_virt_usec PAPI_get_virt_cyc PAPI_library_init Author Generated automatically by Doxygen for PAPI from the source code. Version Tue Jun 17 2014 PAPI_get_real_nsec(3)