int main(int argc, char **argv)
{
pid_t pid;
int status;
char **new_argv;
prfcnt_t prfcnt;
tsc_t timer;
cpu_set_t cpu_set;
int err;
if ( argc < 2){
printf("Usage: %s <cmd> (args)\n", argv[0]);
exit(1);
}
new_argv = &argv[1];
/*
* CPU affinity is inherited across a fork()
*/
CPU_ZERO(&cpu_set);
CPU_SET(0,&cpu_set);
err = sched_setaffinity(getpid(), sizeof(cpu_set_t), &cpu_set);
if (err){
perror("sched_setaffinity");
exit(1);
}
if ( (pid = fork()) < 0){
perror("fork");
exit(1);
}
tsc_init(&timer);
prfcnt_init(&prfcnt,0,PRFCNT_FL_T0|PRFCNT_FL_T1);
/*
* FIXME: Is this efficient enough ? Could it be done better ?
*/
if (pid) {
prfcnt_start(&prfcnt);
tsc_start(&timer);
wait(&status);
tsc_pause(&timer);
prfcnt_pause(&prfcnt);
} else {
execv(argv[1],new_argv);
perror("execv");
exit(1);
}
tsc_report(&timer);
prfcnt_report(&prfcnt);
return 0;
}
int
main(int argc, const char *argv[])
{
unsigned nthreads;
size_t nints;
int sum1, sum2;
int *arr;
nints = 0;
if (argc > 1)
nints = atol(argv[1]);
if (nints == 0)
nints = 100000;
#pragma omp parallel
#pragma omp master
nthreads = omp_get_num_threads();
printf("Number of threads: %u\n", nthreads);
printf("number of ints: %lu\n", nints);
arr = arr_int_mkrand(nints, &sum1);
sum2 = 0;
tsc_t t; tsc_init(&t); tsc_start(&t);
#pragma omp parallel for reduction(+:sum2)
for (size_t i=0; i<nints; i++) {
sum2 += sum_op(arr[i]);
}
tsc_pause(&t);
tsc_report("sum_OMP", &t);
if (sum1 != sum2) {
fprintf(stderr, "Error in sum: %d vs %d\n", sum1, sum2);
abort();
}
printf("DONE\n");
return 0;
}
int
main(int argc, const char *argv[])
{
if (argc < 4) {
fprintf(stderr,
"Usage: %s <array_size> <block_size> <accesses>\n",
argv[0]);
exit(1);
}
unsigned int asize = atol(argv[1]);
unsigned int bsize = atol(argv[2]);
unsigned int accesses = atol(argv[3]);
unsigned int seed = time(NULL);
tsc_t tc;
/* normal pointers */
srand(seed);
printf("CoPy\n");
unsigned int *p, *p_copy;
unsigned int sum_copy = 0;
p = xmalloc(asize*sizeof(unsigned int));
for (unsigned int i=0; i<asize; i++)
p[i] = i;
tsc_init(&tc);
tsc_start(&tc);
p_copy = xmalloc(asize*sizeof(unsigned int));
memcpy(p_copy, p, asize*sizeof(unsigned int));
for (unsigned int j=0; j<accesses; j++) {
unsigned int idx = rand() % asize;
p_copy[idx] = 0;
}
#ifdef DO_SUMS
for (unsigned int j=0; j<asize; j++) {
sum_copy += p_copy[j];
}
#endif
tsc_pause(&tc);
tsc_report(&tc);
/* versioned pointers */
tsc_t t;
srand(seed);
printf("VerSions\n");
unsigned int sum_versions = 0;
sla_t *sla = sla_init(10, .5, 16, time(NULL));
sla->def_nitems = bsize;
for (unsigned int i=0; i<asize; i++)
sla_append(sla, i);
tsc_init(&t);
tsc_start(&t);
versla_t *versla = versla_init(sla);
ver_t *v1 = versla_newver(versla, versla->vo.ver_base);
for (unsigned int j=0; j<accesses; j++) {
unsigned int idx = rand() % asize;
versla_set(versla, idx, 0, v1);
}
#ifdef DO_SUMS
for (unsigned int j=0; j<asize; j++) {
unsigned int x = versla_get(versla, j, v1);
sum_versions += x;
}
#endif
tsc_pause(&t);
tsc_report(&t);
printf("\ntC/tV=%lf\n", (double)tsc_getticks(&tc)/(double)tsc_getticks(&t));
for (unsigned int j=0; j<asize; j++) {
unsigned int x0 = p_copy[j];
unsigned int x1 = versla_get(versla, j, v1);
if (x0 != x1) {
fprintf(stderr, "copy:%d and versions:%d differ for j=%d\n", x0, x1, j);
}
}
assert(sum_versions == sum_copy);
return 0;
}