static void precision_init(int prec) {
int i;
mpf_t f0;
mpf_set_default_prec(prec);
mpf_init2(epsilon, 2);
mpf_init2(negepsilon, 2);
mpf_init(recipeulere);
mpf_init(pi);
mpf_init(eulere);
mpf_set_ui(epsilon, 1);
mpf_div_2exp(epsilon, epsilon, prec);
mpf_neg(negepsilon, epsilon);
mpf_init(f0);
mpf_set_ui(eulere, 1);
mpf_set_ui(f0, 1);
for (i=1;; i++) {
mpf_div_ui(f0, f0, i);
if (mpf_cmp(f0, epsilon) < 0) {
break;
}
mpf_add(eulere, eulere, f0);
}
mpf_clear(f0);
mpf_ui_div(recipeulere, 1, eulere);
compute_pi(prec);
}
int main()
{
uint64_t begin,end;
unsigned long long int dt;
double pi,times;
double rpi=acos(-1.0);
double err;
FILE *fp=fopen("result.txt","w");
dt=0x100000;
for(dt=0x100000;dt<=0x40000000;dt<<=1)
{
begin=clock();
pi=compute_pi(dt);
end=clock();
times = (double)(end - begin) / (CLOCKS_PER_SEC/1000);
err = (pi-rpi)/rpi;
printf("dt = %lluM\n",(dt/(1<<20)));
printf("pi = %.10f\n",pi);
printf("time = %f\n",times);
printf("error rate = %.10e\n",err);
fprintf(fp,"%llu\t%.10f\t%f\t%.16f\n",(dt/(1<<20)),pi,times,err);
}
return 0;
}
int main(void)
{
double time_elapsed[DT_SIZE];
int ds;
double pi;
double start, finish;
pthread_barrier_init(&barrier, NULL, (unsigned) THREAD_NUM);
for (ds = 0; ds < DT_SIZE; ds++) {
start = clock();
compute_pi(ds*1000000);
finish = clock();
time_elapsed[ds] = (double)(finish-start)/CLOCKS_PER_SEC;
pi = 0.0;
//printf("pi= %lf\tdelta_size= %d\ttime= %lf\n", pi, ds, (double)(finish-start)/CLOCKS_PER_SEC);
}
FILE *fp;
fp = fopen("baseline_pthread.txt", "w+");
int i;
fprintf(fp, "#delta_size\ttime\n");
for (i = 0; i < DT_SIZE; i++) {
fprintf(fp, "%d\t%lf\n", i, time_elapsed[i]);
}
fclose(fp);
return 0;
}
int main(int argc, char *argv[])
{
struct timespec start, end;
double cpu_time;
double pi;
assert(compute_pi(128*1024*1024) &&"Did you implement compute_pi()");
clock_gettime(CLOCK_REALTIME, &start);
pi=compute_pi((size_t)128*1024*1024);
clock_gettime(CLOCK_REALTIME, &end);
cpu_time = diff_in_second(start, end);
printf("pi: %lf\n",pi);
printf("execution time of compute_pi() : %lf sec\n", cpu_time);
return 0;
}
int main(void)
{
printf("pid: %d\n", getpid());
clock_t start_time, end_time;
double pi;
start_time = clock();
pi = compute_pi(128000000);
end_time = clock();
printf("%f\nTime : %f\n", pi, (double)(end_time-start_time)/CLOCKS_PER_SEC);
return 0;
}
int main(int argc, char* argv[])
{
int N = atoi(argv[1]);
clock_t begin = clock();
double result = compute_pi(N*1024*1024);
clock_t end = clock();
double time = (double)(end-begin)/CLOCKS_PER_SEC;
printf("%lf \n",time);
return 0;
}
int main(void)
{
clock_t start_time, end_time;
double pi;
double total_time;
start_time = clock();
pi = compute_pi(128000000);
end_time = clock();
total_time =(double) (end_time-start_time)/CLOCKS_PER_SEC;
printf("%f\nTime : %f\n", pi,total_time);
return 0;
}
int main()
{
std::random_device rd;
auto seed_data = std::array<int, std::mt19937::state_size> {};
std::generate(std::begin(seed_data), std::end(seed_data), std::ref(rd));
std::seed_seq seq(std::begin(seed_data), std::end(seed_data));
auto eng = std::mt19937{ seq };
auto dist = std::uniform_real_distribution<>{ 0, 1 };
for (auto j = 0; j < 10; j++)
{
std::cout << compute_pi(eng, dist) << std::endl;
}
}
void kmp(char *t,char *p){
int *pi;
int m = strlen(p);
pi = (int *)malloc(m*sizeof(int));
compute_pi(pi,p);
int i = 0;
int q = pi[1];
int length_t = strlen(t);
int length_p = m;
for (i=0; i < length_t; ++i){
while ( q > 0 && t[i] != p[q]){
q = pi[q];
}
if (t[i] == p[q]){
q = q + 1;
}
if (q == length_p){
printf("result is %d\n",(i-(length_p-1)));
q = pi[q];
}
}
}
int main(int argc, char* argv[])
{
unsigned int operation = atoi(argv[1]);
size_t n = atoi(argv[2]);
clock_t begin, end;
double time_spent[SAMPLE_SIZE];
double min, max;
double (*compute_pi)(size_t);
char method_name[32];
char time_filename[32];
char error_filename[32];
switch(operation) {
case 0:
compute_pi = &compute_pi_baseline;
strcpy(method_name, "compute_pi_baseline");
strcpy(time_filename, "time_baseline.txt");
strcpy(error_filename, "error_baseline.txt");
break;
case 1:
compute_pi = &compute_pi_avx;
strcpy(method_name, "compute_pi_avx");
strcpy(time_filename, "time_avx.txt");
strcpy(error_filename, "error_avx.txt");
break;
case 2:
compute_pi = &compute_pi_leibniz;
strcpy(method_name, "compute_pi_leibniz");
strcpy(time_filename, "time_leibniz.txt");
strcpy(error_filename, "error_leibniz.txt");
break;
case 3:
compute_pi = &compute_pi_leibniz_avx;
strcpy(method_name, "compute_pi_leibniz_avx");
strcpy(time_filename, "time_leibniz_avx.txt");
strcpy(error_filename, "error_leibniz_avx.txt");
break;
case 4:
compute_pi = &compute_pi_euler;
strcpy(method_name, "compute_pi_euler");
strcpy(time_filename, "time_euler.txt");
strcpy(error_filename, "error_euler.txt");
break;
case 5:
compute_pi = &compute_pi_euler_avx;
strcpy(method_name, "compute_pi_euler_avx");
strcpy(time_filename, "time_euler_avx.txt");
strcpy(error_filename, "error_euler_avx.txt");
break;
case 6:
compute_pi = &compute_pi_euler2;
strcpy(method_name, "compute_pi_euler2_avx");
strcpy(time_filename, "time_euler2.txt");
strcpy(error_filename, "error_euler2.txt");
break;
default:
break;
}
for (int i = 0; i < SAMPLE_SIZE; i++) {
begin = clock();
compute_pi(n * 1000000);
end = clock();
time_spent[i] = (double)(end - begin) / CLOCKS_PER_SEC;
}
double mean_time = compute_ci(&min, &max, time_spent);
double pi = compute_pi(n * 1000000);
double diff = pi - M_PI > 0 ? pi - M_PI : M_PI - pi;
double error = diff / M_PI;
printf("%s(%zuM) needs time in 95%% confidence interval[%lf, %lf]\n",
method_name, n, min, max);
printf("error rate = %.15lf\n", error);
FILE *fw = fopen(time_filename, "a");
fprintf(fw, "%zu %lf\n", n, mean_time);
fclose(fw);
fw = fopen(error_filename, "a");
fprintf(fw, "%zu %.15lf\n", n, error);
fclose(fw);
return 0;
}
int main(int argc, char* argv[])
{
char operation[32];
size_t n = atoi(argv[2]);
strncpy(operation, argv[1], 32);
clock_t begin, end;
double time_spent[SAMPLE_SIZE];
double min, max;
double (*compute_pi)(size_t);
char method_name[64];
char time_filename[64];
char error_filename[64];
if (!strcmp(operation, "baseline")) {
compute_pi = &compute_pi_baseline;
strcpy(method_name, "compute_pi_baseline");
strcpy(time_filename, "time_baseline.txt");
strcpy(error_filename, "error_baseline.txt");
} else if (!strcmp(operation, "baseline_avx")) {
compute_pi = &compute_pi_baseline_avx;
strcpy(method_name, "compute_pi_baseline_avx");
strcpy(time_filename, "time_baseline_avx.txt");
strcpy(error_filename, "error_baseline_avx.txt");
} else if (!strcmp(operation, "leibniz")) {
compute_pi = &compute_pi_leibniz;
strcpy(method_name, "compute_pi_leibniz");
strcpy(time_filename, "time_leibniz.txt");
strcpy(error_filename, "error_leibniz.txt");
} else if (!strcmp(operation, "leibniz_avx")) {
compute_pi = &compute_pi_leibniz_avx;
strcpy(method_name, "compute_pi_leibniz_avx");
strcpy(time_filename, "time_leibniz_avx.txt");
strcpy(error_filename, "error_leibniz_avx.txt");
} else if (!strcmp(operation, "leibniz_avx_opt")) {
compute_pi = &compute_pi_leibniz_avx_opt;
strcpy(method_name, "compute_pi_leibniz_avx_opt");
strcpy(time_filename, "time_leibniz_avx_opt.txt");
strcpy(error_filename, "error_leibniz_avx_opt.txt");
} else if (!strcmp(operation, "leibniz_avx_opt_single")) {
compute_pi = &compute_pi_leibniz_avx_opt_single;
strcpy(method_name, "compute_pi_leibniz_avx_opt_single");
strcpy(time_filename, "time_leibniz_avx_opt_single.txt");
strcpy(error_filename, "error_leibniz_avx_opt_single.txt");
} else if (!strcmp(operation, "leibniz_fma")) {
compute_pi = &compute_pi_leibniz_fma;
strcpy(method_name, "compute_pi_leibniz_fma");
strcpy(time_filename, "time_leibniz_fma.txt");
strcpy(error_filename, "error_leibniz_fma.txt");
} else if (!strcmp(operation, "recursion")) {
compute_pi = &compute_pi_recursion;
strcpy(method_name, "compute_pi_recursion");
strcpy(time_filename, "time_recursion.txt");
strcpy(error_filename, "error_recursion.txt");
} else if (!strcmp(operation, "leibniz_JM")) {
compute_pi = &compute_pi_leibniz_JM;
strcpy(method_name, "compute_pi_leibniz_JM");
strcpy(time_filename, "time_leibniz_JM.txt");
strcpy(error_filename, "error_leibniz_JM.txt");
}
for (int i = 0; i < SAMPLE_SIZE; i++) {
begin = clock();
compute_pi(n * 1024*1024);
end = clock();
time_spent[i] = (double)(end - begin) / CLOCKS_PER_SEC;
}
double mean_time = compute_ci(&min, &max, time_spent);
double pi = 0.0;
pi = compute_pi(n * 1024*1024);
double diff = pi - M_PI > 0 ? pi - M_PI : M_PI - pi;
double error = diff / M_PI;
printf("%s(%zuM) needs time in 95%% confidence interval[%lf, %lf]\n",
method_name, n, min, max);
printf("error rate = %.15lf\n", error);
FILE *fw = fopen(time_filename, "a");
fprintf(fw, "%zu %lf\n", n, mean_time);
fclose(fw);
fw = fopen(error_filename, "a");
fprintf(fw, "%zu %.15lf\n", n, error);
fclose(fw);
return 0;
}
int main()
{
int selection;;
//Loop with switch statement drives the user interface
//User keeps entering options until they quit
do
{
printf("Please Select an Option\n");
printf("1-Computing pi\n");
printf("2-Computing Square Root\n");
printf("3-Displaying Primes\n");
printf("4-Processing Grades\n");
printf("5-Computing Tax\n");
printf("6-Solving Quadratic\n");
printf("7-Computing Factorials\n");
printf("8-Counting File\n");
printf("9-Sorting File\n");
printf("10-Student File\n");
printf("11-Quit\n");
scanf("%d",&selection);
switch(selection)
{
case 1: //Compute pi
{
int n;
printf("How many terms of pi do you wish to compute: ");
scanf("%d",&n);
printf("pi to %d terms is %lf\n",n,compute_pi(n));
break;
}
case 2: //Compute square root
{
double n;
printf("Which square root do you wish to compute: ");
scanf("%lf",&n);
printf("the square root of %lf is %lf\n",n,compute_sqrt(n));
break;
}
case 3: //Display primes
{
int n;
printf("Enter an number to calculate primes up to: ");
scanf("%d",&n);
display_primes(n);
break;
}
case 4: //Process grades
{
process_scores();
break;
}
case 5: //Compute tax
{
int income;
char status[10];
char state;
printf("What is your income: ");
scanf("%d",&income);
printf("In state or out of state: ");
scanf("\n%c",&state);
printf("Are you single or married: ");
scanf("%s",status);
printf("Your taxes are: %lf\n",compute_tax(income,status,state));
break;
}
case 6: //Solving quadratic
{
double solution1;
double solution2;
double a;
double b;
double c;
int solutions;
printf("enter a: ");
scanf("%lf",&a);
printf("enter b: ");
scanf("%lf",&b);
printf("enter c: ");
scanf("%lf",&c);
solutions = quadratic(a,b,c,&solution1,&solution2);
if (solutions)
{
printf("Solution 1: %lf\n",solution1);
printf("Solution 2: %lf\n",solution2);
}
else
{
printf("There were no solutions\n");
}
break;
}
case 7: //Computing factorial
{
int n;
printf("Enter the factorial to compute: ");
scanf("%d",&n);
printf("%d! is %d\n",n, factorial(n));
break;
}
case 8: //counting file
{
char input_file[50];
int characters;
int lines;
printf("Enter the file name to open: ");
scanf("%s",input_file);
file_count(input_file,&characters,&lines);
printf("Number of lines: %d\n",lines);
printf("Number of characters including EOF: %d\n",characters);
break;
}
case 9: //sorting file
{
char input_file[50];
char output_file[50];
printf("Enter the input file name: ");
scanf("%s",input_file);
printf("Enter the output file name: ");
scanf("%s",output_file);
file_sort(input_file,output_file);
printf("Operation Complete\n");
break;
}
case 10: //student file
{
char input_file[50];
printf("Enter the input file name: ");
scanf("%s",input_file);
file_student(input_file);
printf("Operation Complete\n");
break;
}
case 11: //quit
{
break;
}
default: //Error for incorrect entries
printf("Your entry is invalid. Please try again\n");
}
}while(selection != 11); //do until user quits
return 0;
}