int main(int argc, char *argv[]) {
int n = 1;
double cvals[NVALS];
int ccnts[NVALS];
int nval = 0;
if (argc > 1) {
n = atoi(argv[1]);
}
int i, j;
for (i = 0; i < n; i++) {
double c = mhz(1) / 1000.0;
int found = 0;
for (j = 0; !found && j < nval; j++) {
if (found = (c == cvals[j]))
ccnts[j]++;
}
if (!found) {
cvals[nval] = c;
ccnts[nval++] = 1;
}
int stime = random() & 0x7;
printf("Sleeping for %d seconds\n", stime);
sleep(stime);
}
if (nval == 1) {
printf("Stable clock rate = %.2f\n", cvals[0]);
} else {
printf("Multiple clock rates measured:");
for (j = 0; j < nval; j++) {
printf(" %.2f (%d times)", cvals[j], ccnts[j]);
}
printf("\n");
}
return 0;
}
/* $begin mountainmain */
int main()
{
int size; /* Working set size (in bytes) */
int stride; /* Stride (in array elements) */
double Mhz; /* Clock frequency */
init_data(data, MAXELEMS); /* Initialize each element in data to 1 */
Mhz = mhz(0, 4); /* Estimate the clock frequency */
/* $end mountainmain */
/* Not shown in the text */
printf("Clock frequency is approx. %.1f MHz\n", Mhz);
printf("Memory mountain (MB/sec)\n");
printf("\t");
for (stride = 1; stride <= MAXSTRIDE; stride++)
printf("s%d\t", stride);
printf("\n");
/* $begin mountainmain */
for (size = MAXBYTES; size >= MINBYTES; size >>= 1) {
/* $end mountainmain */
/* Not shown in the text */
if (size > (1 << 20))
printf("%dm\t", size / (1 << 20));
else
printf("%dk\t", size / 1024);
/* $begin mountainmain */
for (stride = 1; stride <= MAXSTRIDE; stride++) {
printf("%.1f\t", run(size, stride, Mhz));
}
printf("\n");
}
exit(0);
}
void start_counter()
{
if (cpu_ghz == 0.0)
mhz(gverbose);
if (clock_gettime(CLKT, &last_time) != 0) {
fprintf(stderr, "Couldn't get time\n");
exit(1);
}
}
/* Perform test of combinition function */
static void run_test(lower_t lf, int len)
{
double time;
double tpe;
current_lf = lf;
setup(len);
current_lf(data);
time = fcyc(run, NULL) / mhz(0) * 1e-6;
tpe = time * 1e6 /(double) len;
/* print results */
printf("%d\t%f\t%f\n", len, time, tpe);
}
int main(void)
{
int size; /* Working set size (in bytes) */
int stride; /* Stride (in array elements) */
double Mhz; /* Clock frequence */
init_data(data,MAXELEMS);
Mhz = mhz(0); /* Estimate the clock frequency */
for (size = MAXBYTES;size >= MINBYTES;size >> 1){
for (stride = 1;stride <= MAXSTRIDE;stride ++){
printf("%.1f\t",run(size,stride,Mhz));
}
printf("\n");
}
exit(EXIT_SUCCESS);
}
int main (int argc, char *argv[])
{
int iters = 1000000;
double MHz = mhz(1);
int i;
int sum = 0;
double cycs;
start_counter();
for (i = 0; i < iters; i++) {
sum += i;
cycs = get_counter();
}
printf("%d calls in %.0f clock cycles = %.3f usec/call\n",
iters, cycs, cycs / (MHz * iters));
return 0;
}
int main()
{
int size; // working set size(in bytes)
int stride;
double Mhz;
init_data(data, MAXELEMS);
Mhz = mhz(0); // estimate the clock frequency
for (size = MAXBYTES; size >= MINBYTES; size >>= 1)
{
for(stride = 1; stride <= MAXSTRIDE; stride++){
printf("%.1f\t",run(size, stride, Mhz));
}
printf("\n");
}
exit(0);
}
/* $begin mountainmain */
int main()
{
int size; /* Working set size (in bytes) */
int stride; /* Stride (in array elements) */
double Mhz; /* Clock frequency */
int i;
init_data(data, MAXELEMS); /* Initialize each element in data to 1 */
Mhz = mhz(0); /* Estimate the clock frequency */
/* $end mountainmain */
/* Not shown in the text */
printf("Clock frequency is approx. %.1f MHz\n", Mhz);
printf("Memory mountain (MB/sec)\n");
printf("\t");
for (stride = 1; stride <= MAXSTRIDE; stride++)
printf("%d\t", stride);
printf("\n");
unsigned int sizes[24] = {32*1024*1024, 24*1024*1024, 16*1024*1024, 12*1024*1024, 8*1024*1024, 6*1024*1024, 1024*512+5*1024*1024, 1024*256+5*1024*1024, 5*1024*1024, 4*1024*1024, 2*1024*1024, 1024*1024, 512*1024, 256*1024, (128+64)*1024, 128*1024, 64*1024, 32*1024, 16*1024};
/* $begin mountainmain */
for (i=0; i<19; i++){
size = sizes[i];
/* Not shown in the text */
if (size >= (1 << 20))
printf("%.1fM ", (float)size / (float)(1 << 20));
else
printf("%.1fK ", (float)size / (float)1024);
/* $begin mountainmain */
for (stride = 1; stride <= MAXSTRIDE; stride++) {
printf("%.1f ", run(size, stride, Mhz));
}
printf("\n");
}
exit(0);
}
/*
* init_fsecs - initialize the timing package
*/
void init_fsecs(void)
{
Mhz = 0; /* keep gcc -Wall happy */
#if USE_FCYC
if (verbose)
printf("Measuring performance with a cycle counter.\n");
/* set key parameters for the fcyc package */
set_fcyc_maxsamples(20);
set_fcyc_clear_cache(1);
set_fcyc_compensate(1);
set_fcyc_epsilon(0.01);
set_fcyc_k(3);
Mhz = mhz(verbose > 0);
#elif USE_ITIMER
if (verbose)
printf("Measuring performance with the interval timer.\n");
#elif USE_GETTOD
if (verbose)
printf("Measuring performance with gettimeofday().\n");
#endif
}
int main()
{
double ctime,ptime,mhzest;
pid_t pid;
/* get estimate of mhz rating of cpu */
mhzest = mhz();
start_counter();
if ((pid = fork()) == 0)
{
ctime = dget_counter();
printf("Child: %.8d ticks (%.2f ms)\n", (int) ctime,
ctime/(mhzest * 1e3));
exit(0);
}
else
{
ptime = dget_counter();
printf("Parent: %.8d ticks (%.2f ms)\n", (int) ptime,
ptime/(mhzest * 1e3));
waitpid(pid,NULL,0);
}
}
int main(int argc, char* args[]){
mhz(1,1);
}
double mhz_full(int verbose, int sleeptime) {
return mhz(verbose);
}
int main()
{
mhz(1,1);
return 0;
}
