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pistress.c
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pistress.c
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#include <stdio.h>
#include <stdlib.h>
#include <time.h>
float gettemp() {
FILE *fp;
int c=0, i=0;
char x[5];
fp = fopen ("/sys/class/thermal/thermal_zone0/temp","r");
if( fp == NULL ) {
puts("Cannot access /sys/class/thermal/thermal_zone0/temp. You may need to update your firmware.");
return 1;
}
while((c = fgetc(fp)) != EOF) {
x[i] = c;
i++;
}
fclose(fp);
float temp = atof(x) / 1000;
return temp;
}
double primetime() {
clock_t start, end;
double runtime;
start = clock();
int num,primes = 0, limit = 100000;
for (num = 1; num <= limit; num++) {
int i = 2;
while(i <= num) {
if(num % i == 0)
break;
i++;
}
if(i == num)
primes++;
}
end = clock();
runtime = (end - start) / (double) CLOCKS_PER_SEC;
return runtime;
}
int main(int argc, char *argv[]) {
double totaltime=0, time=0;
float totaltemp=0, temp=0;
int y;
for (y = 1; y < 5; y++) {
printf("Test %i\n",y);
time = primetime();
temp = gettemp();
printf(" CPU temp: %.2f\260C\n",temp);
printf(" Time taken: %gs\n",time);
printf("\n");
totaltemp = totaltemp+temp;
totaltime = totaltime+time;
}
temp = totaltemp / (y-1);
time = totaltime / (y-1);
printf("Testing complete.\n Average CPU temp: %.2f\260C\n Average time taken: %gs\n",temp,time);
return 0;
}