From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Sun, 4 Sep 2011 16:39:23 +0000 (-0400)
Subject: hash table tests: Add initial hash population to glib hash table test
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=d149d812fd91191a95726b781ff24d3959166c86;p=userspace-rcu.git

hash table tests: Add initial hash population to glib hash table test

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

diff --git a/tests/test_glib_hash.c b/tests/test_glib_hash.c
index 7fed39b..3043557 100644
--- a/tests/test_glib_hash.c
+++ b/tests/test_glib_hash.c
@@ -175,6 +175,7 @@ pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
 void rcu_copy_mutex_lock(void)
 {
 	int ret;
+
 	ret = pthread_mutex_lock(&rcu_copy_mutex);
 	if (ret) {
 		perror("Error in pthread mutex lock");
@@ -483,13 +484,20 @@ void *thr_writer(void *_count)
 	return ((void*)2);
 }
 
-static void populate_hash(void)
+static int populate_hash(void)
 {
 	struct cds_lfht_node *node, *lookup_node;
 	void *key;
 
 	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(1);
@@ -514,6 +522,7 @@ static void populate_hash(void)
 		}
 		nr_writes++;
 	}
+	return 0;
 }
 
 static
@@ -666,7 +675,8 @@ int main(int argc, char **argv)
 	count_writer = malloc(sizeof(*count_writer) * nr_writers);
 	test_ht = g_hash_table_new_full(test_hash_fct, test_compare_fct,
 			NULL, free);
-	populate_hash();
+	ret = populate_hash();
+	assert(!ret);
         err = create_all_cpu_call_rcu_data(0);
         assert(!err);