#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include "papi.h"
#define NUM_EVENTS 6
static int Events[NUM_EVENTS];
static const char* names[NUM_EVENTS] = {"READ_CALLS", "READ_BYTES","READ_USEC","WRITE_CALLS","WRITE_BYTES","WRITE_USEC"};
static long long values[NUM_EVENTS];
__attribute__ ((constructor)) void my_init(void) {
//fprintf(stderr, "appio: constructor started\n");
int version = PAPI_library_init (PAPI_VER_CURRENT);
if (version != PAPI_VER_CURRENT) {
fprintf(stderr, "PAPI_library_init version mismatch\n");
exit(1);
}
else {
fprintf(stderr, "appio: PAPI library initialized\n");
}
int retval;
int e;
for (e=0; e<NUM_EVENTS; e++) {
retval = PAPI_event_name_to_code((char*)names[e], &Events[e]);
if (retval != PAPI_OK) {
fprintf(stderr, "Error getting code for %s\n", names[e]);
exit(2);
}
}
/* Start counting events */
fprintf(stderr, "appio: starting PAPI counters; main program will follow\n");
if (PAPI_start_counters(Events, NUM_EVENTS) != PAPI_OK) {
fprintf(stderr, "Error in PAPI_start_counters\n");
exit(1);
}
return;
}
__attribute__ ((destructor)) void my_fini(void) {
int e;
//fprintf(stderr, "appio: destructor called\n");
if (PAPI_stop_counters(values, NUM_EVENTS) != PAPI_OK) {
fprintf(stderr, "Error in PAPI_stop_counters\n");
}
fprintf(stderr, "\nappio: PAPI counts (for pid=%6d)\n"
"appio: ----------------------------\n", (int)getpid());
for (e=0; e<NUM_EVENTS; e++)
fprintf(stderr, "appio: %s : %lld\n", names[e], values[e]);
return;
}