[dpdk-dev] [PATCH v3] app/eventdev: use proper teardown sequence

[Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>]

Use proper teardown sequence when SIGINT is caught to prevent
eventdev from going into undefined state.

Signed-off-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
---

 v3 Changes:
 - Segregate ethdev_stop and close to prevent possible SEGFAULT.
 - handle early shutdown.
 v2 Changes:
 - Only stopping the ethdev(producer) is sufficient.(Jerin)

 app/test-eventdev/evt_main.c             | 40 +++++++++++++++---------
 app/test-eventdev/test_perf_common.c     |  1 -
 app/test-eventdev/test_pipeline_common.c |  1 -
 3 files changed, 25 insertions(+), 17 deletions(-)

diff --git a/app/test-eventdev/evt_main.c b/app/test-eventdev/evt_main.c
index 57bb94570..0d5028c17 100644
--- a/app/test-eventdev/evt_main.c
+++ b/app/test-eventdev/evt_main.c
@@ -20,29 +20,39 @@ struct evt_test *test;
 static void
 signal_handler(int signum)
 {
-	if (signum == SIGINT || signum == SIGTERM) {
+	int i;
+	static uint8_t once;
+
+	if ((signum == SIGINT || signum == SIGTERM) && !once) {
+		once = true;
 		printf("\nSignal %d received, preparing to exit...\n",
 				signum);
-		/* request all lcores to exit from the main loop */
-		*(int *)test->test_priv = true;
-		rte_wmb();

-		rte_eal_mp_wait_lcore();
+		if (test != NULL) {
+			/* request all lcores to exit from the main loop */
+			*(int *)test->test_priv = true;
+			rte_wmb();
+
+			if (test->ops.ethdev_destroy)
+				test->ops.ethdev_destroy(test, &opt);

-		if (test->ops.test_result)
-			test->ops.test_result(test, &opt);
+			rte_eal_mp_wait_lcore();

-		if (test->ops.eventdev_destroy)
-			test->ops.eventdev_destroy(test, &opt);
+			if (test->ops.test_result)
+				test->ops.test_result(test, &opt);

-		if (test->ops.ethdev_destroy)
-			test->ops.ethdev_destroy(test, &opt);
+			RTE_ETH_FOREACH_DEV(i)
+				rte_eth_dev_close(i);

-		if (test->ops.mempool_destroy)
-			test->ops.mempool_destroy(test, &opt);
+			if (test->ops.eventdev_destroy)
+				test->ops.eventdev_destroy(test, &opt);

-		if (test->ops.test_destroy)
-			test->ops.test_destroy(test, &opt);
+			if (test->ops.mempool_destroy)
+				test->ops.mempool_destroy(test, &opt);
+
+			if (test->ops.test_destroy)
+				test->ops.test_destroy(test, &opt);
+		}

 		/* exit with the expected status */
 		signal(signum, SIG_DFL);
diff --git a/app/test-eventdev/test_perf_common.c b/app/test-eventdev/test_perf_common.c
index d00f91802..6d39f98e0 100644
--- a/app/test-eventdev/test_perf_common.c
+++ b/app/test-eventdev/test_perf_common.c
@@ -743,7 +743,6 @@ void perf_ethdev_destroy(struct evt_test *test, struct evt_options *opt)
 		RTE_ETH_FOREACH_DEV(i) {
 			rte_event_eth_rx_adapter_stop(i);
 			rte_eth_dev_stop(i);
-			rte_eth_dev_close(i);
 		}
 	}
 }
diff --git a/app/test-eventdev/test_pipeline_common.c b/app/test-eventdev/test_pipeline_common.c
index 719518ff3..96e7c9882 100644
--- a/app/test-eventdev/test_pipeline_common.c
+++ b/app/test-eventdev/test_pipeline_common.c
@@ -467,7 +467,6 @@ pipeline_ethdev_destroy(struct evt_test *test, struct evt_options *opt)
 	RTE_ETH_FOREACH_DEV(i) {
 		rte_event_eth_rx_adapter_stop(i);
 		rte_eth_dev_stop(i);
-		rte_eth_dev_close(i);
 	}
 }

--
2.18.0