[PATCH v4 3/3] test/threads: add unit test for thread API

[Tyler Retzlaff <roretzla@linux.microsoft.com>]

Establish unit test for testing thread api. Initial unit tests
for rte_thread_{get,set}_affinity_by_id().

Signed-off-by: Narcisa Vasile <navasile@microsoft.com>
Signed-off-by: Tyler Retzlaff <roretzla@linux.microsoft.com>
---
 app/test/meson.build    |  2 ++
 app/test/test_threads.c | 89 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 91 insertions(+)
 create mode 100644 app/test/test_threads.c

diff --git a/app/test/meson.build b/app/test/meson.build
index 5fc1dd1..5a9d69b 100644
--- a/app/test/meson.build
+++ b/app/test/meson.build
@@ -133,6 +133,7 @@ test_sources = files(
         'test_tailq.c',
         'test_thash.c',
         'test_thash_perf.c',
+        'test_threads.c',
         'test_timer.c',
         'test_timer_perf.c',
         'test_timer_racecond.c',
@@ -238,6 +239,7 @@ fast_tests = [
         ['reorder_autotest', true],
         ['service_autotest', true],
         ['thash_autotest', true],
+        ['threads_autotest', true],
         ['trace_autotest', true],
 ]
 
diff --git a/app/test/test_threads.c b/app/test/test_threads.c
new file mode 100644
index 0000000..0ca6745
--- /dev/null
+++ b/app/test/test_threads.c
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright (C) 2022 Microsoft Corporation
+ */
+
+#include <string.h>
+#include <pthread.h>
+
+#include <rte_thread.h>
+#include <rte_debug.h>
+
+#include "test.h"
+
+RTE_LOG_REGISTER(threads_logtype_test, test.threads, INFO);
+
+static uint32_t thread_id_ready;
+
+static void *
+thread_main(void *arg)
+{
+	*(rte_thread_t *)arg = rte_thread_self();
+	__atomic_store_n(&thread_id_ready, 1, __ATOMIC_RELEASE);
+
+	return NULL;
+}
+
+static int
+test_thread_affinity(void)
+{
+	pthread_t id;
+	rte_thread_t thread_id;
+
+	RTE_TEST_ASSERT(pthread_create(&id, NULL, thread_main, &thread_id) == 0,
+		"Failed to create thread");
+
+	while (__atomic_load_n(&thread_id_ready, __ATOMIC_ACQUIRE) == 0)
+		;
+
+	rte_cpuset_t cpuset0;
+	RTE_TEST_ASSERT(rte_thread_get_affinity_by_id(thread_id, &cpuset0) == 0,
+		"Failed to get thread affinity");
+
+	rte_cpuset_t cpuset1;
+	RTE_TEST_ASSERT(rte_thread_get_affinity_by_id(thread_id, &cpuset1) == 0,
+		"Failed to get thread affinity");
+	RTE_TEST_ASSERT(memcmp(&cpuset0, &cpuset1, sizeof(rte_cpuset_t)) == 0,
+		"Affinity should be stable");
+
+	RTE_TEST_ASSERT(rte_thread_set_affinity_by_id(thread_id, &cpuset1) == 0,
+		"Failed to set thread affinity");
+	RTE_TEST_ASSERT(rte_thread_get_affinity_by_id(thread_id, &cpuset0) == 0,
+		"Failed to get thread affinity");
+	RTE_TEST_ASSERT(memcmp(&cpuset0, &cpuset1, sizeof(rte_cpuset_t)) == 0,
+		"Affinity should be stable");
+
+	size_t i;
+	for (i = 1; i < CPU_SETSIZE; i++)
+		if (CPU_ISSET(i, &cpuset0)) {
+			CPU_ZERO(&cpuset0);
+			CPU_SET(i, &cpuset0);
+
+			break;
+		}
+	RTE_TEST_ASSERT(rte_thread_set_affinity_by_id(thread_id, &cpuset0) == 0,
+		"Failed to set thread affinity");
+	RTE_TEST_ASSERT(rte_thread_get_affinity_by_id(thread_id, &cpuset1) == 0,
+		"Failed to get thread affinity");
+	RTE_TEST_ASSERT(memcmp(&cpuset0, &cpuset1, sizeof(rte_cpuset_t)) == 0,
+		"Affinity should be stable");
+
+	return 0;
+}
+
+static struct unit_test_suite threads_test_suite = {
+	.suite_name = "threads autotest",
+	.setup = NULL,
+	.teardown = NULL,
+	.unit_test_cases = {
+		TEST_CASE(test_thread_affinity),
+		TEST_CASES_END()
+	}
+};
+
+static int
+test_threads(void)
+{
+	return unit_test_suite_runner(&threads_test_suite);
+}
+
+REGISTER_TEST_COMMAND(threads_autotest, test_threads);
-- 
1.8.3.1