CentOS 7.0 - man page for papi_register_thread (centos section 3)
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PAPI_register_thread(3) PAPI PAPI_register_thread(3)
Notify PAPI that a thread has 'appeared'.
int PAPI_register_thread (void);
PAPI_register_thread() should be called when the user wants to force PAPI to initialize a
thread that PAPI has not seen before.
Usually this is not necessary as PAPI implicitly detects the thread when an eventset is
created or other thread local PAPI functions are called. However, it can be useful for
debugging and performance enhancements in the run-time systems of performance tools.
PAPI_ENOMEM Space could not be allocated to store the new thread information.
PAPI_ESYS A system or C library call failed inside PAPI, see the errno variable.
PAPI_ECMP Hardware counters for this thread could not be initialized.
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Version 18.104.22.168 Tue Jun 17 2014 PAPI_register_thread(3)
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