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copied!<p>Did you get any ideas regarding this? I am doing the same thing, but I am getting strange results: my counters are not updated as often as I'd like them.</p> <p>For the record, here is a sample that I tested and works well:</p> <pre><code>#include <papi.h> #include <stdio.h> #include <stdlib.h> main() { int retval, EventSet = PAPI_NULL; long_long values[3]; unsigned counter; unsigned c; unsigned long fact; unsigned stoppoint; /* Initialize the PAPI library */ retval = PAPI_library_init(PAPI_VER_CURRENT); if (retval != PAPI_VER_CURRENT) { fprintf(stderr, "PAPI library init error!\n"); exit(1); } /* Create the Event Set */ if (PAPI_create_eventset(&EventSet) != PAPI_OK) printf ("%s:%d\t ERROR\n", __FILE__, __LINE__); /* Add Total Instructions Executed to our EventSet */ if (PAPI_add_event(EventSet, PAPI_TOT_INS) != PAPI_OK) printf ("%s:%d\t ERROR\n", __FILE__, __LINE__); /* Add Total Instructions Executed to our EventSet */ if (PAPI_add_event(EventSet, PAPI_TOT_CYC) != PAPI_OK) printf ("%s:%d\t ERROR\n", __FILE__, __LINE__); /* Add Total Instructions Executed to our EventSet */ if (PAPI_add_event(EventSet, PAPI_LST_INS) != PAPI_OK) printf ("%s:%d\t ERROR\n", __FILE__, __LINE__); srand ( time(NULL) ); stoppoint = 50+(rand() % 100); /* Do some computation here */ for (counter = 0; counter < stoppoint; counter++) { /* Initialize the PAPI library */ retval = PAPI_library_init(PAPI_VER_CURRENT); if (retval != PAPI_VER_CURRENT) { fprintf(stderr, "PAPI library init error!\n"); exit(1); } /* Start counting */ if (PAPI_start(EventSet) != PAPI_OK) printf ("%s:%d\t ERROR\n", __FILE__, __LINE__); fact = 1; for (c = 1; c <= counter; c++) { fact = c * c; } printf("Factorial of %d is %lu\n", counter, fact); if (PAPI_read(EventSet, values) != PAPI_OK) printf ("%s:%d\t ERROR\n", __FILE__, __LINE__); printf ("\nTotal Instructions Completed:\t%lld\t Total Cycles:\t%lld\tLoad Store Instructions\t%lld\n\n", values[0], values[1], values[2]); /* Do some computation here */ if (PAPI_stop(EventSet, values) != PAPI_OK) printf ("%s:%d\t ERROR\n", __FILE__, __LINE__); } /* End of computation */ } </code></pre>

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