rculfhash test: Check random pool size

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

diff --git a/tests/test_urcu_hash.c b/tests/test_urcu_hash.c
index b13b1bd6f125d18dfbf4d6c6e603d21a49c33bd3..88dd1ae0dfcf4189c2e93101f9b940494662b782 100644 (file)
--- a/tests/test_urcu_hash.c
+++ b/tests/test_urcu_hash.c
@@ -480,12 +480,19 @@ void *thr_writer(void *_count)
        return ((void*)2);
 }
 
-static void populate_hash(void)
+static int populate_hash(void)
 {
        struct cds_lfht_node *node, *ret_node;
 
        if (!init_populate)
-               return;
+               return 0;
+
+       if (add_unique && init_populate * 10 > rand_pool) {
+               printf("WARNING: required to populate %lu nodes (-k), but random "
+"pool is quite small (%lu values) and we are in add_unique (-u) mode. Try with a "
+"larger random pool (-p option).\n", init_populate, rand_pool);
+               return -1;
+       }
 
        while (nr_add < init_populate) {
                node = malloc(sizeof(struct cds_lfht_node));
@@ -503,6 +510,7 @@ static void populate_hash(void)
                        nr_add++;
                nr_writes++;
        }
+       return 0;
 }
 
 void show_usage(int argc, char **argv)
@@ -648,7 +656,8 @@ int main(int argc, char **argv)
        count_writer = malloc(sizeof(*count_writer) * nr_writers);
        test_ht = cds_lfht_new(test_hash, test_compare, 0x42UL,
                         init_hash_size, call_rcu);
-       populate_hash();
+       ret = populate_hash();
+       assert(!ret);
         err = create_all_cpu_call_rcu_data(0);
         assert(!err);