#include <urcu.h>
#include <urcu/wfcqueue.h>
+enum test_sync {
+ TEST_SYNC_MUTEX = 0,
+ TEST_SYNC_NONE,
+};
+
+static enum test_sync test_sync;
+
static volatile int test_go, test_stop;
static unsigned long rduration;
/* read-side C.S. duration, in loops */
static unsigned long wdelay;
-static inline void loop_sleep(unsigned long l)
+static inline void loop_sleep(unsigned long loops)
{
- while(l-- != 0)
+ while (loops-- != 0)
caa_cpu_relax();
}
static int verbose_mode;
+static int test_dequeue, test_splice;
+
#define printf_verbose(fmt, args...) \
do { \
if (verbose_mode) \
- printf(fmt, args); \
+ printf(fmt, ## args); \
} while (0)
static unsigned int cpu_affinities[NR_CPUS];
static void set_affinity(void)
{
+#if HAVE_SCHED_SETAFFINITY
cpu_set_t mask;
- int cpu;
- int ret;
+ int cpu, ret;
+#endif /* HAVE_SCHED_SETAFFINITY */
if (!use_affinity)
return;
static struct cds_wfcq_head __attribute__((aligned(CAA_CACHE_LINE_SIZE))) head;
static struct cds_wfcq_tail __attribute__((aligned(CAA_CACHE_LINE_SIZE))) tail;
-void *thr_enqueuer(void *_count)
+static void *thr_enqueuer(void *_count)
{
unsigned long long *count = _count;
printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
- "enqueuer", pthread_self(), (unsigned long)gettid());
+ "enqueuer", (unsigned long) pthread_self(),
+ (unsigned long) gettid());
set_affinity();
count[1] = URCU_TLS(nr_successful_enqueues);
printf_verbose("enqueuer thread_end, thread id : %lx, tid %lu, "
"enqueues %llu successful_enqueues %llu\n",
- pthread_self(), (unsigned long)gettid(),
+ pthread_self(),
+ (unsigned long) gettid(),
URCU_TLS(nr_enqueues), URCU_TLS(nr_successful_enqueues));
return ((void*)1);
}
-void *thr_dequeuer(void *_count)
+static void do_test_dequeue(enum test_sync sync)
+{
+ struct cds_wfcq_node *node;
+
+ if (sync == TEST_SYNC_MUTEX)
+ node = cds_wfcq_dequeue_blocking(&head, &tail);
+ else
+ node = __cds_wfcq_dequeue_blocking(&head, &tail);
+
+ if (node) {
+ free(node);
+ URCU_TLS(nr_successful_dequeues)++;
+ }
+ URCU_TLS(nr_dequeues)++;
+}
+
+static void do_test_splice(enum test_sync sync)
+{
+ struct cds_wfcq_head tmp_head;
+ struct cds_wfcq_tail tmp_tail;
+ struct cds_wfcq_node *node, *n;
+
+ cds_wfcq_init(&tmp_head, &tmp_tail);
+
+ if (sync == TEST_SYNC_MUTEX)
+ cds_wfcq_splice_blocking(&tmp_head, &tmp_tail,
+ &head, &tail);
+ else
+ __cds_wfcq_splice_blocking(&tmp_head, &tmp_tail,
+ &head, &tail);
+
+ __cds_wfcq_for_each_blocking_safe(&tmp_head, &tmp_tail, node, n) {
+ free(node);
+ URCU_TLS(nr_successful_dequeues)++;
+ URCU_TLS(nr_dequeues)++;
+ }
+}
+
+static void *thr_dequeuer(void *_count)
{
unsigned long long *count = _count;
+ unsigned int counter;
printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
- "dequeuer", pthread_self(), (unsigned long)gettid());
+ "dequeuer", (unsigned long) pthread_self(),
+ (unsigned long) gettid());
set_affinity();
cmm_smp_mb();
for (;;) {
- struct cds_wfcq_node *node =
- cds_wfcq_dequeue_blocking(&head, &tail);
-
- if (node) {
- free(node);
- URCU_TLS(nr_successful_dequeues)++;
+ if (test_dequeue && test_splice) {
+ if (counter & 1)
+ do_test_dequeue(test_sync);
+ else
+ do_test_splice(test_sync);
+ counter++;
+ } else {
+ if (test_dequeue)
+ do_test_dequeue(test_sync);
+ else
+ do_test_splice(test_sync);
}
-
- URCU_TLS(nr_dequeues)++;
if (caa_unlikely(!test_duration_dequeue()))
break;
if (caa_unlikely(rduration))
printf_verbose("dequeuer thread_end, thread id : %lx, tid %lu, "
"dequeues %llu, successful_dequeues %llu\n",
- pthread_self(), (unsigned long)gettid(),
+ pthread_self(),
+ (unsigned long) gettid(),
URCU_TLS(nr_dequeues), URCU_TLS(nr_successful_dequeues));
count[0] = URCU_TLS(nr_dequeues);
count[1] = URCU_TLS(nr_successful_dequeues);
return ((void*)2);
}
-void test_end(unsigned long long *nr_dequeues)
+static void test_end(unsigned long long *nr_dequeues)
{
struct cds_wfcq_node *node;
} while (node);
}
-void show_usage(int argc, char **argv)
+static void show_usage(int argc, char **argv)
{
printf("Usage : %s nr_dequeuers nr_enqueuers duration (s)", argv[0]);
printf(" [-d delay] (enqueuer period (in loops))");
printf(" [-c duration] (dequeuer period (in loops))");
printf(" [-v] (verbose output)");
printf(" [-a cpu#] [-a cpu#]... (affinity)");
+ printf(" [-q] (test dequeue)");
+ printf(" [-s] (test splice, enabled by default)");
+ printf(" [-M] (use mutex external synchronization)");
+ printf(" [-0] (use no external synchronization)");
+ printf(" Note: default: mutex external synchronization used.");
printf("\n");
}
case 'v':
verbose_mode = 1;
break;
+ case 'q':
+ test_dequeue = 1;
+ break;
+ case 's':
+ test_splice = 1;
+ break;
+ case 'M':
+ test_sync = TEST_SYNC_MUTEX;
+ break;
+ case '0':
+ test_sync = TEST_SYNC_NONE;
+ break;
}
}
+ /* activate splice test by default */
+ if (!test_dequeue && !test_splice)
+ test_splice = 1;
+
printf_verbose("running test for %lu seconds, %u enqueuers, "
"%u dequeuers.\n",
duration, nr_enqueuers, nr_dequeuers);
+ if (test_dequeue)
+ printf_verbose("dequeue test activated.\n");
+ else
+ printf_verbose("splice test activated.\n");
+ if (test_sync == TEST_SYNC_MUTEX)
+ printf_verbose("External sync: mutex.\n");
+ else
+ printf_verbose("External sync: none.\n");
printf_verbose("Writer delay : %lu loops.\n", rduration);
printf_verbose("Reader duration : %lu loops.\n", wdelay);
printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
- "main", pthread_self(), (unsigned long)gettid());
+ "main", (unsigned long) pthread_self(),
+ (unsigned long) gettid());
tid_enqueuer = malloc(sizeof(*tid_enqueuer) * nr_enqueuers);
tid_dequeuer = malloc(sizeof(*tid_dequeuer) * nr_dequeuers);