我正在尝试使用papi进行测试,但是我遇到了一些错误,我不明白他们为什么会这样做。我无法在网上找到任何东西。代码在
之下我正在使用PAPI和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);
}
在输出文件中,我只看到以下内容:
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
我不明白为什么ret,ret2,cleanup和destroy失败了。为什么呢?
答案 0 :(得分:0)
您可以使用PAPI_perror
或PAPI_strerror
函数来获取与错误返回值相关联的错误消息。这可能有助于追踪为什么,例如PAPI_flops
失败。 (可能是您的系统没有支持所需的事件。)
PAPI_cleanup_eventset
失败的原因是因为它只需要整数EventSet
,而不是指向它的指针。
我强烈建议发出错误返回值字符串,并编译警告 - 后者可能会发现错误参数类型的问题。