PAPIf_hl_region_begin - Reads and stores hardware events at the beginning of an instrumented code region.

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Version 7.1.0.0                                  Thu Dec 14 2023                        PAPIf_hl_region_begin(3)

FortranPrototype:
           #include 'fpapi.h'
           PAPIf_hl_region_begin(C_STRINGregion,C_INTcheck)ReturnvaluesPAPI_OKPAPI_ENOTRUN -- EventSet is currently not running or could not determined.
           PAPI_ESYS -- A system or C library call failed inside PAPI, see the errno variable.
           PAPI_EMISC -- PAPI has been deactivated due to previous erros.
           PAPI_ENOMEM -- Insufficient memory.

       PAPIf_hl_region_begin reads hardware events and stores them internally at the beginning of an
       instrumented code region. If not specified via environment variable PAPI_EVENTS, default events are used.
       The first call sets all counters implicitly to zero and starts counting. Note that if PAPI_EVENTS is not
       set or cannot be interpreted, default hardware events are recorded.

       Example:

       export PAPI_EVENTS="PAPI_TOT_INS,PAPI_TOT_CYC"

       integer retval

       call PAPIf_hl_region_begin("computation", retval)
       if ( retval .NE. PAPI_OK ) then
            write (*,*) "PAPIf_hl_region_begin failed!"
       end if

       !do some computation here

       call PAPIf_hl_region_end("computation", retval)
       if ( retval .NE. PAPI_OK ) then
           write (*,*) "PAPIf_hl_region_end failed!"
       end if

       SeealsoPAPI_hl_region_begin

       PAPIf_hl_region_begin - Reads and stores hardware events at the beginning of an instrumented code region.