int main(int argc, char *argv[])
{
int i;
int nkids = 1;
smp_init();
if (argc > 1) {
nkids = strtoul(argv[1], NULL, 0);
if (nkids > NR_THREADS) {
fprintf(stderr, "nkids = %d too large, max = %d\n",
nkids, NR_THREADS);
usage(argv[0]);
}
}
printf("%d ", nkids);
goflag = -1;
for (i = 0; i < nkids; i++)
create_thread(counter_test, NULL);
goflag = 1;
sleep(1);
goflag = 0;
wait_all_threads();
printf("count: %d\n", counter);
exit(0);
}
int main(int argc, char *argv[])
{
int i;
int nkids = 1;
smp_init();
if (argc > 1) {
nkids = strtoul(argv[1], NULL, 0);
if (nkids > NR_THREADS) {
fprintf(stderr, "nkids = %d too large, max = %d\n",
nkids, NR_THREADS);
usage(argv[0]);
}
}
printf("Parent thread spawning %d threads.\n", nkids);
for (i = 0; i < nkids; i++)
create_thread(thread_test, (void *)i);
wait_all_threads();
printf("All spawned threads completed.\n", nkids);
exit(0);
}
static void stresstest(int nreaders, int duration)
{
int i;
rcu_stress_current = &rcu_stress_array[0];
rcu_stress_current->pipe_count = 0;
rcu_stress_current->mbtest = 1;
for (i = 0; i < nreaders; i++) {
create_thread(rcu_read_stress_test);
}
create_thread(rcu_update_stress_test);
for (i = 0; i < 5; i++) {
create_thread(rcu_fake_update_stress_test);
}
goflag = GOFLAG_RUN;
g_usleep(duration * G_USEC_PER_SEC);
goflag = GOFLAG_STOP;
wait_all_threads();
printf("n_reads: %lld n_updates: %ld n_mberror: %d\n",
n_reads, n_updates, n_mberror);
printf("rcu_stress_count:");
for (i = 0; i <= RCU_STRESS_PIPE_LEN; i++) {
printf(" %lld", rcu_stress_count[i]);
}
printf("\n");
exit(0);
}
int main(int argc, char *argv[])
{
int i;
struct memblock *p[2 * TARGET_POOL_SIZE] = { 0 };
long long nc;
long long nf;
int nkids = 1;
int runlength = 1;
int totbefore;
smp_init();
initpools();
if (argc > 1) {
nkids = strtoul(argv[1], NULL, 0);
if (nkids > NR_THREADS) {
fprintf(stderr, "nkids = %d too large, max = %d\n",
nkids, NR_THREADS);
usage(argv[0]);
}
}
if (argc > 2) {
runlength = strtoul(argv[2], NULL, 0);
if (runlength > MAX_RUN) {
fprintf(stderr, "nkids = %d too large, max = %d\n",
runlength, MAX_RUN);
usage(argv[0]);
}
}
printf("%d %d ", nkids, runlength);
init_per_thread(results, 0L);
init_per_thread(failures, 0L);
totbefore = memblocks_available();
goflag = 1;
for (i = 0; i < nkids; i++)
create_thread(memblock_test, (void *)(long)runlength);
sleep(1);
goflag = 0;
wait_all_threads();
nf = nc = 0;
for (i = 0; i < NR_THREADS; i++) {
nc += per_thread(results, i);
nf += per_thread(failures, i);
}
printf("a/f: %Ld fail: %Ld\n", nc, nf);
if (memblocks_available() != totbefore) {
printf("memblocks: before: %d after: %d\n",
totbefore, memblocks_available());
}
exit(0);
}
int main(int argc, char *argv[])
{
int i;
smp_init();
create_thread(collect_timestamps, (void *)0);
create_thread(collect_timestamps, (void *)1);
wait_all_threads();
for (i = 0; i < sizeof(ts) / sizeof(ts[0]); i++) {
printf("%llx", ts[i]);
if (i > 0)
printf(" %lld", ts[i] - ts[i - 1]);
printf("\n");
}
exit(0);
}
static void perftestrun(int nthreads, int duration, int nreaders, int nupdaters)
{
while (atomic_read(&nthreadsrunning) < nthreads) {
g_usleep(1000);
}
goflag = GOFLAG_RUN;
g_usleep(duration * G_USEC_PER_SEC);
goflag = GOFLAG_STOP;
wait_all_threads();
printf("n_reads: %lld n_updates: %ld nreaders: %d nupdaters: %d duration: %d\n",
n_reads, n_updates, nreaders, nupdaters, duration);
printf("ns/read: %g ns/update: %g\n",
((duration * 1000*1000*1000.*(double)nreaders) /
(double)n_reads),
((duration * 1000*1000*1000.*(double)nupdaters) /
(double)n_updates));
exit(0);
}
int main(int argc, char *argv[])
{
int nthreads = 0;
create_thread(test_xchg_lock, (void *)0);
nthreads++;
create_thread(test_xchg_lock, (void *)1);
nthreads++;
smp_mb();
while (atomic_read(&nthreadsrunning) < nthreads)
poll(NULL, 0, 1);
WRITE_ONCE(goflag, GOFLAG_RUN);
smp_mb();
poll(NULL, 0, 10000);
smp_mb();
WRITE_ONCE(goflag, GOFLAG_STOP);
smp_mb();
wait_all_threads();
printf("lockacqs = %lu, lockerr = %lu\n", lockacqs, lockerr);
return 0;
}
static void gtest_stress(int nreaders, int duration)
{
int i;
rcu_stress_current = &rcu_stress_array[0];
rcu_stress_current->pipe_count = 0;
rcu_stress_current->mbtest = 1;
for (i = 0; i < nreaders; i++) {
create_thread(rcu_read_stress_test);
}
create_thread(rcu_update_stress_test);
for (i = 0; i < 5; i++) {
create_thread(rcu_fake_update_stress_test);
}
goflag = GOFLAG_RUN;
g_usleep(duration * G_USEC_PER_SEC);
goflag = GOFLAG_STOP;
wait_all_threads();
g_assert_cmpint(n_mberror, ==, 0);
for (i = 2; i <= RCU_STRESS_PIPE_LEN; i++) {
g_assert_cmpint(rcu_stress_count[i], ==, 0);
}
}
void perftestrun(int nthreads, int nreaders, int nwriters)
{
int t;
int duration = 240;
long long n_reads = 0LL;
long long n_read_retries = 0LL;
long long n_read_errs = 0LL;
long long n_writes = 0LL;
smp_mb();
while (atomic_read(&nthreadsrunning) < nthreads)
poll(NULL, 0, 1);
goflag = GOFLAG_RUN;
smp_mb();
poll(NULL, 0, duration);
smp_mb();
goflag = GOFLAG_STOP;
smp_mb();
wait_all_threads();
for_each_thread(t) {
n_reads += per_thread(n_reads_pt, t);
n_read_retries += per_thread(n_read_retries_pt, t);
n_read_errs += per_thread(n_read_errs_pt, t);
n_writes += per_thread(n_writes_pt, t);
}
if (n_read_errs != 0)
printf("!!! read-side errors detected: %lld\n", n_read_errs);
printf("n_reads: %lld n_read_retries: %lld n_writes: %lld nreaders: %d nwriters: %d n_elems: %d duration: %d\n",
n_reads, n_read_retries, n_writes, nreaders, nwriters, n_elems, duration);
printf("ns/read: %g ns/write: %g\n",
((duration * 1000*1000.*(double)nreaders) /
(double)n_reads),
((duration * 1000*1000.*(double)nwriters) /
(double)n_writes));
exit(0);
}
int main(int argc, char *argv[])
{
int done;
int i;
int iter;
smp_init();
if (argc > 1) {
nkids = strtoul(argv[1], NULL, 0);
if (nkids > NR_THREADS) {
fprintf(stderr, "nkids = %d too large, max = %d\n",
nkids, NR_THREADS);
usage(argv[0]);
}
}
printf("Number of threads: %d\n", nkids);
spin_lock_init(&mutex);
goflag = GOFLAG_INIT;
for (i = 0; i < nkids; i++)
create_thread(init_test, NULL);
for (iter = 0; iter < 100; iter++) {
spin_lock(&mutex);
for_each_thread(i) {
per_thread(doneflag, i) = 0;
}
__get_thread_var(doneflag) = 1;
atomic_set(&counter, 0);
atomic_set(&start_count, 0);
initialized = 0;
spin_unlock(&mutex);
spin_lock(&mutex);
goflag = GOFLAG_START;
spin_unlock(&mutex);
poll(NULL, 0, 1);
done = 0;
while (!done) {
done = 1;
for (i = 0; i < nkids; i++)
if (!per_thread(doneflag, i)) {
done = 0;
break;
}
poll(NULL, 0, 1);
}
if (atomic_read(&counter) != 1) {
printf("Double initialization, counter = %d\n",
atomic_read(&counter));
exit(-1);
} else {
printf("Iteration %d succeeded\n", iter);
}
spin_lock(&mutex);
atomic_set(&counter, 0);
spin_unlock(&mutex);
spin_lock(&mutex);
goflag = GOFLAG_INIT;
while (atomic_read(&counter) < nkids)
poll(NULL, 0, 1);
spin_unlock(&mutex);
spin_lock(&mutex);
atomic_set(&counter, 0);
spin_unlock(&mutex);
}
goflag = GOFLAG_STOP;
wait_all_threads();
exit(0);
}
