/*
* Test case for appio
* Author: Tushar Mohan
* tusharmohan@gmail.com
*
* Description: This test case reads from standard linux /etc/group
* and writes the output to /dev/null
* Fread and fwrite are used for I/O.
* Statistics are printed at the end of the run.,
*/
#include <papi.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "papi.h"
#include "papi_test.h"
#define NUM_EVENTS 8
int main(int argc, char** argv) {
int Events[NUM_EVENTS];
const char* names[NUM_EVENTS] = {"READ_CALLS", "READ_BYTES","READ_USEC","READ_ERR", "READ_EOF", "WRITE_CALLS","WRITE_BYTES","WRITE_USEC"};
long long values[NUM_EVENTS];
char *infile = "/etc/group";
/* Set TESTS_QUIET variable */
tests_quiet( argc, argv );
int version = PAPI_library_init (PAPI_VER_CURRENT);
if (version != PAPI_VER_CURRENT) {
fprintf(stderr, "PAPI_library_init version mismatch\n");
exit(1);
}
if (!TESTS_QUIET) printf("This program will read %s and write it to /dev/null\n", infile);
FILE* fdin=fopen(infile, "r");
if (fdin == NULL) perror("Could not open file for reading: \n");
FILE* fout=fopen("/dev/null", "w");
if (fout == NULL) perror("Could not open file for writing: \n");
int bytes = 0;
char buf[1024];
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 */
if (PAPI_start_counters(Events, NUM_EVENTS) != PAPI_OK) {
fprintf(stderr, "Error in PAPI_start_counters\n");
exit(1);
}
//if (PAPI_read_counters(values, NUM_EVENTS) != PAPI_OK)
// handle_error(1);
//printf("After reading the counters: %lld\n",values[0]);
while ((bytes = fread(buf, 1, 1024, fdin)) > 0) {
fwrite(buf, 1, bytes, fout);
}
fclose(fdin);
fclose(fout);
/* Stop counting events */
if (PAPI_stop_counters(values, NUM_EVENTS) != PAPI_OK) {
fprintf(stderr, "Error in PAPI_stop_counters\n");
}
if (!TESTS_QUIET) {
printf("----\n");
for (e=0; e<NUM_EVENTS; e++)
printf("%s: %lld\n", names[e], values[e]);
}
test_pass( __FILE__ );
return 0;
}