I am trying to test out using papi, but I am getting some errors that I don't understand why they're occurring. I couldn't find anything online for them. The code is below
I am using PAPI and C.
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <memory.h>
#include <malloc.h>
#include "papi.h"
#define INDEX 100
static void test_fail(char *file, int line, char *call, int retval);
int main(int argc, char **argv) {
extern void dummy(void *);
float matrixa[INDEX][INDEX], matrixb[INDEX][INDEX], mresult[INDEX] [INDEX];
float real_time, proc_time, mflops;
long long flpins;
int retval, status = 0;
int i,j,k;
long_long values[1];
FILE *file;
file = fopen("output.txt","w");
retval = PAPI_library_init(PAPI_VER_CURRENT);
int EventSet = PAPI_NULL;
PAPI_create_eventset(&EventSet);
if(PAPI_add_event(EventSet, PAPI_LD_INS) != PAPI_OK)
{
fprintf(file,"PAPI failed to add Load/Store instructions\n");
}
if (PAPI_state(EventSet, &status) != PAPI_OK)
fprintf(file,"state fail\n");
fprintf(file, "State is now %d\n", status);
if (PAPI_start(EventSet) != PAPI_OK)
fprintf(file,"start fail\n");
if (PAPI_state(EventSet, &status) != PAPI_OK)
fprintf(file,"state2 fail\n");
fprintf(file, "State is now %d\n", status);
/* Initialize the Matrix arrays */
for ( i=0; i<INDEX; i++ ){
mresult[0][i] = 0.0;
matrixa[0][i] = matrixb[0][i] = rand()*(float)1.1; }
if((retval=PAPI_flops( &real_time, &proc_time, &flpins, &mflops))<PAPI_OK)
fprintf(file,"retval failed\n");
for (i=0;i<INDEX;i++)
{
for(j=0;j<INDEX;j++)
{
for(k=0;k<INDEX;k++)
{
mresult[i][j]=mresult[i][j] + matrixa[i][k]*matrixb[k][j];
}
}
}
if((retval=PAPI_flops( &real_time, &proc_time, &flpins, &mflops)) <PAPI_OK)
{
fprintf(infile,"ret2 failed\n");
}
fprintf(file,"Real_time:\t%f\nProc_time:\t%f\nTotal flpins:\t%lld \nMFLOPS:\t\t%f\n",
real_time, proc_time, flpins, mflops);
fflush(file);
fprintf(file,"%s\tPASSED\n", __FILE__);
fflush(file);
if (PAPI_read(EventSet, values) != PAPI_OK)
{fprintf(file,"read fail\n");}
if (PAPI_stop(EventSet, values) != PAPI_OK)
{fprintf(file,"stop fail\n");}
if (PAPI_cleanup_eventset(&EventSet) != PAPI_OK)
{fprintf(file,"cleanup fail\n");}
if (PAPI_destroy_eventset(&EventSet) != PAPI_OK)
{fprintf(file,"destroy fail\n");}
fprintf(file,"\nValues is %f\n", values[0]);
fflush(file);
fclose(file);
PAPI_shutdown();
exit(0);
}
In the output file, I just see the below:
State is now 1
State is now 2
retval failed
ret2 failed
Real_time: 0.000000
Proc_time: 0.000000
Total flpins: 99
MFLOPS: 0.000000
PAPI_flops.c PASSED
cleanup fail
destroy fail
I don't understand why ret, ret2, cleanup and destroy failed. Why?
You can use the PAPI_perror or PAPI_strerror functions to get the error message associated with an error return value. This may help track down why, for example, PAPI_flops is failing. (It could be that there is no support on your system for the required events.)
The reason why PAPI_cleanup_eventset is failing though is because it takes just the integer EventSet, not a pointer to it.
I'd strongly recommend emitting the error return value strings, and also compiling with warnings on — the latter would likely have found the issue with the wrong parameter type.
Related
I'm a newbie in error handling; in my code I need to test the returned value of a function and to print the error's description if an error happens.
In order to keep the code thread-safe I have to use strerror_r, but I have some difficult to use it. In the following code the error number 22 happens (ret_setschedparam is 22). How can I print the description of the error number 22, i.e. "Invalid argument", by using the strerror_r?
I think that this prototype should be the right strerror_r I need:
char *strerror_r(int errnum, char *buf, size_t buflen);
#include <stdlib.h>
#include <stdio.h>
#include <pthread.h>
#include <sched.h>
#include <errno.h>
#include <string.h>
void *task();
int main()
{
pthread_attr_t attr;
struct sched_param prio;
pthread_t tid;
int ret_create;
int ret_setschedparam;
int ret_getschedparam;
int ret_join;
char *buf_setschedparam;
size_t size_setschedparam = 1024;
pthread_attr_init(&attr);
prio.sched_priority = 12;
ret_setschedparam = pthread_attr_setschedparam(&attr, &prio);
if (ret_setschedparam != 0) {
printf("Errore numero (pthread_attr_setschedparam): %s\n", strerror_r(errno, buf_setschedparam, size_setschedparam));
exit(EXIT_FAILURE);
}
ret_create = pthread_create(&tid, &attr, task, NULL);
printf("%d %d\n", ret_create, EPERM);
if (ret_create != 0) {
printf("Errore numero (pthread_create): %d\n", ret_create);
exit(EXIT_FAILURE);
}
ret_getschedparam = pthread_attr_getschedparam(&attr, &prio);
if (ret_getschedparam != 0) {
printf("Errore numero (pthread_attr_getschedparam): %d\n", ret_getschedparam);
exit(EXIT_FAILURE);
}
printf("Livello di priorità del thread: %d\n", prio.sched_priority);
ret_join = pthread_join(tid, NULL);
if (ret_join != 0) {
printf("Errore numero (pthread_join): %d\n", ret_join);
exit(EXIT_FAILURE);
}
return(0);
}
void *task()
{
printf("I am a simple thread.\n");
pthread_exit(NULL);
}
The compiler gives me an error: it said that the output of strerror_r is an int, not a char.
I think that this prototype should be the right strerro_r I need:
Note that this isn't the standard strerror_r interface, but a GNU extension.
You probably want to build your program with -D_GNU_SOURCE or add #define _GNU_SOURCE 1 to the top of your file to get this prototype instead of the standard one.
You are also not calling strerror_r correctly. This call:
char *buf_setschedparam;
size_t size_setschedparam = 1024;
... strerror_r(errno, buf_setschedparam, size_setschedparam)
promises to strerror_r that buf_setscheparam points to a buffer of size 1024. In fact that pointer is uninitialized, so once you get your program to build, it will promptly crash.
In addition, pthread_* functions do not set errno, they return the error code directly.
You want:
const size_t size_setschedparam = 1024;
char buf_setschedparam[size_setschedparam];
... sterror_r(ret_setschedparam, buf_setschedparam, size_setschedparam);
or even better:
char buf[1024];
... sterror_r(ret_setschedparam, buf, sizeof(buf));
I've read some of the warnings against using the sysctl() call in C, and it seems if I cannot use sysctl() safely, the only other way I can find to make the needed change would be to use soemething like:
system("echo fs.inotify.max_user_watches=NEW_MAX_DIRECTORIES >> /etc/sysctl.conf");
system("sysctl -p");
(of course, this assumes ensuring the binary is running as root. However, I would rather NOT have to shell out using system calls.
Can someone point me in the correct and safe of using sysctl()?
here is a snippet of the code I am using.
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <string.h>
#include <errno.h>
int main ()
{
int ret;
const char *LOGNAME="iNotifyMonitor";
logger(INFO, "================================================");
ret = startDaemon();
daemonRunning = ret;
if (ret == 0)
{
daemonRunning = 1;
FIRST_RUN = 0;
}
if(ret)
{
syslog(LOG_USER | LOG_ERR, "Error starting iNotifyMonitor");
logger(ERR, "Unable to start iNotifyMonitor");
closelog();
return EXIT_FAILURE;
}
signal(SIGINT, signalHandler);
signal(SIGHUP, signalHandler);
char *log_file_name = malloc(sizeof(char *) * sizeof(char *));
sprintf(log_file_name, "%s%s", INM_LOG_DIR, INM_LOG_FILE);
/* Try to open log file to this daemon */
if (INM_OPEN_LOG && INM_LOG_FILE)
{
log_stream = fopen(concatString(INM_LOG_DIR, INM_LOG_FILE), "a+");
if (log_stream == NULL)
{
char *errMsg;
sprintf(errMsg, "Cannot open log file %s, error: %s", concatString(INM_LOG_DIR, INM_LOG_FILE), strerror(errno));
log_stream = stdout;
}
}
else
{
log_stream = stdout;
}
while (daemonRunning == 1)
{
if (ret < 0)
{
logger(LOG_ERR, "Can not write to log stream: %s, error: %s", (log_stream == stdout) ? "stdout" : log_file_name, strerror(errno));
break;
}
ret = fflush(log_stream);
if (ret != 0)
{
logger(LOG_ERR, "Can not fflush() log stream: %s, error: %s",
(log_stream == stdout) ? "stdout" : log_file_name, strerror(errno));
break;
}
int curcount =countDirectory("/home/darrinw/Development/CrossRoads/");
directoryCount = curcount;
if(directoryCounrt > INM_MAX_DIRECTORIES)
{
int newVal = roundUp(directoryCount, 32768);
// call to sysctl() to modify fs.inotify.max_users_watches=newVal
}
sleep(INM_SCAN_INTERVAL);
}
My understanding is that the modern recommended approach to access sysctl variables is via the pseudo-files in /proc/sys. So just open /proc/sys/fs/inotify/max_user_watches and write there.
int fd = open("/proc/sys/fs/inotify/max_user_watches", O_WRONLY);
dprintf(fd, "%d", NEW_MAX_DIRECTORIES);
close(fd);
Error checking left as an exercise.
Modifying /etc/sysctl.conf would make the setting persist across reboots (assuming your distribution uses the file this way, I am not sure if all of them do). That's kind of rude to do automatically; probably better to use the documentation to advise the system administrator to do it themselves if it's needed.
I'm writing my very first C program and I was really doing well. The application talks to RESTful server. All was good until I decided to use an embedded database(libdb) for storage. I got this code below that was part of my entire program. My problem is it keeps on crashing on this line:
my_archive->db_home_dir = DEFAULT_HOMEDIR;
I thought I was running out of stack so I malloc'd all my lengthy variables but the problem was still occuring so I decided to separate this libdb part into a new code, but the problem still remains.
Any idea what has gone wrong here?
P.S. I'm doing all the coding in Xcode and stepping through each line after debug breakpoint right after main() doesn't help me a bit. Always ends up on the same error line. Or perhaps I just don't know what I'm doing.
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <time.h>
#include "db.h"
#define DEFAULT_HOMEDIR "/Users/mark/Documents/bdb/"
#define URLSDB "urls"
typedef struct archive_dbs {
DB *URLS_dbp;
char *db_home_dir;
char *URLS_db_name;
} ARCHIVE_DBS;
void initialize_archivedbs(ARCHIVE_DBS *my_archive)
{
my_archive->db_home_dir = DEFAULT_HOMEDIR; //CRASHES HERE: Thread 1: EXC_BAD_ACCESS (code=2, address=0x1000061da)
my_archive->URLS_dbp = NULL;
my_archive->URLS_db_name = NULL;
}
void set_db_filenames(ARCHIVE_DBS *my_archive)
{
size_t size;
size = strlen(my_archive->db_home_dir) + strlen(URLSDB) + 1;
my_archive->URLS_db_name = malloc(size);
snprintf(my_archive->URLS_db_name, size, "%s%s", my_archive->db_home_dir, URLSDB);
}
int open_database(DB **dbpp, const char *file_name, const char *program_name, FILE *error_file_pointer)
{
DB *dbp;
u_int32_t open_flags;
int ret;
ret = db_create(&dbp, NULL, 0);
if (ret != 0) {
fprintf(error_file_pointer, "%s: %s\n", program_name,
db_strerror(ret));
return(ret);
}
*dbpp = dbp;
dbp->set_errfile(dbp, error_file_pointer);
dbp->set_errpfx(dbp, program_name);
open_flags = DB_CREATE;
ret = dbp->open(dbp,
NULL,
file_name,
NULL,
DB_BTREE,
open_flags,
0);
if (ret != 0) {
dbp->err(dbp, ret, "Database '%s' open failed.", file_name);
return(ret);
}
return (0);
}
int databases_setup(ARCHIVE_DBS *my_archive, const char *program_name, FILE *error_file_pointer)
{
int ret;
ret = open_database(&(my_archive->URLS_dbp), my_archive->URLS_db_name, program_name, error_file_pointer);
if (ret != 0)
return (ret);
printf("databases opened successfully\n");
return (0);
}
int databases_close(ARCHIVE_DBS *my_archive)
{
int ret;
if (my_archive->URLS_dbp != NULL) {
ret = my_archive->URLS_dbp->close(my_archive->URLS_dbp, 0);
if (ret != 0)
fprintf(stderr, "URLS database close failed: %s\n",
db_strerror(ret));
}
printf("databases closed.\n");
return (0);
}
int main(void){
ARCHIVE_DBS *archivedbs;
initialize_archivedbs(archivedbs);
set_db_filenames(archivedbs);
databases_setup(archivedbs, "urlfetcher", NULL);
open_database(&archivedbs->URLS_dbp, "URLS.db", "urlfetcher",
NULL);
databases_close(archivedbs);
}
I created a program to get all files in a directory, find the individual checksums and then find the total checksums using multithreading.
I am receiving a segmentation fault so I ran gdb and saw that the error is on line 60 where open() is. After researching the seg fault on SO, and on other forums, I attempted to implement a few different approaches such as changing open() to fopen() with a FILE *handle rather than an int. That change proved incorrect.
After hours of debugging and searching, I am clueless and would greatly appreciate any insight.
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdarg.h>
#include <fcntl.h>
#include <time.h>
#include <sys/types.h>
#include <dirent.h>
#include <pthread.h> ///Compile with -pthread or -lpthread
#include <sys/stat.h>
#define BUFFER_SIZE (1<<16)
void cleanup();
void get_filenames();
void* get_checksum();
char **filenames;
int file_cnt;
DIR *dir;
//int handle;
FILE *handle;
unsigned int checksum;
unsigned char* ptr;
int length;
int count;
unsigned char* buffer;
int* sum;
unsigned int total = 0;
int main(int argc, char *argv[]){
int i;
pthread_t* file;
atexit(cleanup);
get_filenames();
printf("There are %d files:\n", file_cnt);
file = calloc(sizeof(pthread_t), file_cnt);
sum = calloc(sizeof(int), file_cnt);
for(i=0; i<file_cnt; i++){
printf("%s\n", filenames[i]);
pthread_create(&(file[i]), NULL, get_checksum, (void*)&filenames[i]);
}
for(i=0; i<file_cnt; i++){
total += sum[i];
}
printf("total is: %u\n", total);
return EXIT_SUCCESS;
}
void* get_checksum(void* a){
int b = *((int *)a);
//handle = open(filenames[b], O_RDONLY); //SEG FAULT HERE
handle = fopen(filenames[b], "r"); //SEG FAULT HERE
if( handle == NULL ){
printf( "Can't open file: %s\n", filenames[b]);
exit(1);
}
buffer = malloc(BUFFER_SIZE);
if( buffer == NULL ){
printf( "Can't get enough memory\n" );
exit(1);
}
checksum = 0;
do{
//length = read( handle, buffer, BUFFER_SIZE );
length = read( handle, buffer, (sizeof(char)));
if( length == -1 ){
printf( "Error reading file: %s\n", filenames[b]);
//return NULL;
exit(1);
}
ptr = buffer;
count = length;
while( count-- ){
checksum = checksum + (unsigned int)( *ptr++ );
sum[b] = checksum;
}
} while( length );
printf("Checksum= %d\nTimes at: %d\n", checksum, (int)clock());
}
void cleanup() {
if(filenames && file_cnt > 0) {
while(file_cnt-- > 0) {
if(filenames[file_cnt]) {
free(filenames[file_cnt]);
}
}
free(filenames);
}
if(dir) {
closedir(dir);
}
return;
}
void get_filenames() {
struct dirent *dir_entry;
if((dir = opendir(".")) == NULL) {
fprintf(stderr, "Couldn't open the directory entry for reading\n");
exit(1);
}
errno = 0;
file_cnt = 0;
while((dir_entry = readdir(dir)) != NULL) {
char **new_filenames = filenames;
static int realative_dirs = 0;
if(realative_dirs < 2 &&
(strcmp(".", dir_entry->d_name) == 0 || strcmp("..", dir_entry->d_name) == 0)
) {
realative_dirs++;
continue;
}
new_filenames = (char **)realloc(filenames, sizeof(char **) * (file_cnt + 1));
if(new_filenames == NULL) {
free(filenames[file_cnt]);
fprintf(stderr, "Could not allocate reference for filename[%d]\n", file_cnt);
exit(1);
}
filenames = new_filenames;
filenames[file_cnt] = (char *)calloc(strlen(dir_entry->d_name) + 1, sizeof(char));
if(filenames[file_cnt] == NULL) {
fprintf(stderr, "Could not allocate memory for filename[%d]'s string: \"%s\"\n",
file_cnt, dir_entry->d_name);
exit(1);
}
strcpy(filenames[file_cnt], dir_entry->d_name);
file_cnt++;
}
if(errno != 0) {
fprintf(stderr, "An error occured getting the filenam list\n");
exit(1);
}
return;
}
Below is the output and gdb debugging:
There are 24 files:
.windows
.xscreensaver
.alias
.cshrc
Segmentation fault
(gdb) run
Starting program: /home/nolooking/a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".
There are 24 files:
.windows
[New Thread 0x7ffff781e700 (LWP 15957)]
.xscreensaver
[New Thread 0x7ffff701d700 (LWP 15958)]
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff781e700 (LWP 15957)]
0x0000000000400d53 in get_checksum (a=0x60b610) at checksum.c:60
60 handle = open(filenames[b], O_RDONLY);
(gdb) backtrace
#0 0x0000000000400d53 in get_checksum (a=0x60b610) at checksum.c:60
#1 0x00007ffff7bc6374 in start_thread () from /lib64/libpthread.so.0
#2 0x00007ffff7907c3d in clone () from /lib64/libc.so.6
(gdb) quit
A debugging session is active.
UPDATE:
I took the advice of one user in the comments who suggested that I use:
handle=fopen((char*)a, "r");. I can successfully print out the file names when the if statement if(handle==NULL) is commented out. When I include that if statement I receive the following output:
There are 24 files:
.windows
.xscreensaver
.alias
.cshrc
Can't open file: p▒`
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <stdarg.h>
#include <fcntl.h>
#include <time.h>
#include <sys/types.h>
#include <dirent.h>
#include <pthread.h>
#include <sys/stat.h>
#define BUFFER_SIZE (1<<16)
void cleanup();
void get_filenames();
void* get_checksum();
char **filenames;
int file_cnt;
DIR *dir;
//int handle;
FILE *handle;
unsigned int checksum;
unsigned char* ptr;
int length;
int count;
unsigned char* buffer;
int* sum;
unsigned int total = 0;
int main(int argc, char *argv[]){
int i;
pthread_t* file;
atexit(cleanup);
get_filenames();
printf("There are %d files:\n", file_cnt);
file = calloc(sizeof(pthread_t), file_cnt);
sum = calloc(sizeof(int), file_cnt);
for(i=0; i<file_cnt; i++){
printf("%s\n", filenames[i]);
pthread_create(&(file[i]), NULL, get_checksum, (void*)&filenames[i]);
}
for(i=0; i<file_cnt; i++){
total += sum[i];
}
printf("total is: %u\n", total);
return EXIT_SUCCESS;
}
void* get_checksum(void* a){
int b = *((int *)a);
handle = fopen(((char*)a), "r");
if( handle == NULL ){
printf( "Can't open file: %s\n", ((char*)a));
exit(1);
}
buffer = malloc(BUFFER_SIZE);
if( buffer == NULL ){
printf( "Can't get enough memory\n" );
exit(1);
}
checksum = 0;
do{
length = read( handle, buffer, BUFFER_SIZE );
if( length == -1 ){
printf( "Error reading file: %s\n", ((char*)a));
//return NULL;
exit(1);
}
ptr = buffer;
count = length;
while( count-- ){
checksum = checksum + (unsigned int)( *ptr++ );
//sum[a] = checksum;
}
} while( length );
printf("Checksum= %d\nTimes at: %d\n", checksum, (int)clock());
}
void cleanup() {
if(filenames && file_cnt > 0) {
while(file_cnt-- > 0) {
if(filenames[file_cnt]) {
free(filenames[file_cnt]);
}
}
free(filenames);
}
if(dir) {
closedir(dir);
}
return;
}
void get_filenames() {
struct dirent *dir_entry;
if((dir = opendir(".")) == NULL) {
fprintf(stderr, "Couldn't open the directory entry for reading\n");
exit(1);
}
errno = 0;
file_cnt = 0;
while((dir_entry = readdir(dir)) != NULL) {
char **new_filenames = filenames;
static int realative_dirs = 0;
if(realative_dirs < 2 &&
(strcmp(".", dir_entry->d_name) == 0 || strcmp("..", dir_entry->d_name) == 0)
) {
realative_dirs++;
continue;
}
new_filenames = (char **)realloc(filenames, sizeof(char **) * (file_cnt + 1));
if(new_filenames == NULL) {
free(filenames[file_cnt]);
fprintf(stderr, "Could not allocate reference for filename[%d]\n", file_cnt);
exit(1);
}
filenames = new_filenames;
filenames[file_cnt] = (char *)calloc(strlen(dir_entry->d_name) + 1, sizeof(char));
if(filenames[file_cnt] == NULL) {
fprintf(stderr, "Could not allocate memory for filename[%d]'s string: \"%s\"\n",
file_cnt, dir_entry->d_name);
exit(1);
}
strcpy(filenames[file_cnt], dir_entry->d_name);
file_cnt++;
}
if(errno != 0) {
fprintf(stderr, "An error occured getting the filenam list\n");
exit(1);
}
return;
}
Why I am receiving that output once I uncomment the if statement?
Change this
pthread_create(&(file[i]), NULL, get_checksum, (void*)&filenames[i]);
to be
pthread_create(&(file[i]), NULL, get_checksum, (void*)i);
and this
int b = *((int *)a);
to be
int b = (int)a;
Also you cannot call read() on a FILE* as it is returned by fopen(). Use fread() instead.
Don't use &i. I'll explain in a bit. The argument you're passing to the thread is wrong a is not an integer. It's meant to be a pointer to a string...
Change the thread create to this...
pthread_create(&(file[i]), NULL, get_checksum, filenames[i]);
then print the string as follows...
void* get_checksum(void *a){
char *file_name = (char *)a;
printf("filename=%s\n", file_name);
You're passing the string as a pointer to the called function. In your code you're trying to use this as an index into the array.
If you want to pass the index as an integer beware... this won't work..
pthread_create(&(file[i]), NULL, get_checksum, &i);
This is multithreaded and the value pointed to by &i is changing as the loop runs. Pass the pointer to the string and do not under any circumstances change filenames as the threads run.
I think your problem is simply because you are passing &filenames[i] instead of simply &i.
Then in void* get_checksum(void* a) you are trying to use a char* as an int.
The code would be more like :
for(i=0; i<file_cnt; i++){
printf("%s\n", filenames[i]);
pthread_create(&(file[i]), NULL, get_checksum, (void*)&i);
}
and in void* get_checksum(void* a) :
int b = *((int *)a);
handle = fopen(filenames[b], "r");
if( handle == NULL ){
printf( "Can't open file: %s\n", filenames[b]);
exit(1);
}
I am having trouble understanding why I can see some output but cannot see the output for certain other lines of the code below. I am using PAPI and C.
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <memory.h>
#include <malloc.h>
#include "papi.h"
#define INDEX 100
static void test_fail(char *file, int line, char *call, int retval);
int main(int argc, char **argv) {
extern void dummy(void *);
float matrixa[INDEX][INDEX], matrixb[INDEX][INDEX], mresult[INDEX] [INDEX];
float real_time, proc_time, mflops;
long long flpins;
int retval, status = 0;
int i,j,k;
long_long values[1];
FILE *file;
file = fopen("output.txt","w");
retval = PAPI_library_init(PAPI_VER_CURRENT);
int EventSet = PAPI_NULL;
PAPI_create_eventset(&EventSet);
if(PAPI_add_event(EventSet, PAPI_L1_DCM) != PAPI_OK)
{
fprintf(file,"PAPI failed to add Load/Store instructions\n");
}
if (PAPI_state(EventSet, &status) != PAPI_OK)
fprintf(file,"PAPI fail\n");
fprintf(file, "State is now %d\n", status);
if (PAPI_start(EventSet) != PAPI_OK)
fprintf(file,"PAPI fail\n");
if (PAPI_state(EventSet, &status) != PAPI_OK)
fprintf(file,"PAPI fail\n");
fprintf(file, "State is now %d\n", status);
/* Initialize the Matrix arrays */
for ( i=0; i<INDEX; i++ ){
mresult[0][i] = 0.0;
matrixa[0][i] = matrixb[0][i] = rand()*(float)1.1; }
if((retval=PAPI_flops( &real_time, &proc_time, &flpins, &mflops))<PAPI_OK)
test_fail(__FILE__, __LINE__, "PAPI_flops", retval);
for (i=0;i<INDEX;i++)
{
for(j=0;j<INDEX;j++)
{
for(k=0;k<INDEX;k++)
{
mresult[i][j]=mresult[i][j] + matrixa[i][k]*matrixb[k][j];
}
}
}
if((retval=PAPI_flops( &real_time, &proc_time, &flpins, &mflops)) <PAPI_OK)
{
test_fail(__FILE__, __LINE__, "PAPI_flops", retval);
}
fprintf(file,"Real_time:\t%f\nProc_time:\t%f\nTotal flpins:\t%lld \nMFLOPS:\t\t%f\n",
real_time, proc_time, flpins, mflops); //cannot see this output in the `output.txt` file
fflush(file);
fprintf(file,"%s\tPASSED\n", __FILE__);
fflush(file);
fclose(file);
PAPI_shutdown();
exit(0);
}
static void test_fail(char *file, int line, char *call, int retval){
}
In the output file, I only see the lines for "State is now". I don't see the outputs for "Real_time:\t%f\nProc_time:\t%f\nTotal flpins:\t%lld \nMFLOPS and the other outputs. I tried to use fflush, but that didn't help either. Anyone know what is going on?