[dpdk-stable] [PATCH] l3fwd-power: add Rx interrupt timeout

[Anatoly Burakov <anatoly.burakov@intel.com>]

Currently, thread waiting on an interrupt does not have a timeout, so
it will not ever wake up until traffic arrives. This means that, when
time comes to exit the application, it will not quit unless there
happens to be traffic coming in and waking up the thread from sleep.

Fix it so that the interrupt thread sleeps for 10ms before waking up
and attempting to poll again.

Fixes: 613ce6691c0d ("examples/l3fwd-power: implement proper shutdown")
Cc: stable@dpdk.org

Signed-off-by: Anatoly Burakov <anatoly.burakov@intel.com>
---
 examples/l3fwd-power/main.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/examples/l3fwd-power/main.c b/examples/l3fwd-power/main.c
index 293b3da4ae..4112bbbee4 100644
--- a/examples/l3fwd-power/main.c
+++ b/examples/l3fwd-power/main.c
@@ -833,7 +833,7 @@ sleep_until_rx_interrupt(int num)
 		"lcore %u sleeps until interrupt triggers\n",
 		rte_lcore_id());
 
-	n = rte_epoll_wait(RTE_EPOLL_PER_THREAD, event, num, -1);
+	n = rte_epoll_wait(RTE_EPOLL_PER_THREAD, event, num, 10);
 	for (i = 0; i < n; i++) {
 		data = event[i].epdata.data;
 		port_id = ((uintptr_t)data) >> CHAR_BIT;
@@ -1306,7 +1306,8 @@ main_loop(__rte_unused void *dummy)
 					/**
 					 * start receiving packets immediately
 					 */
-					goto start_rx;
+					if (likely(!is_done()))
+						goto start_rx;
 				}
 			}
 			stats[lcore_id].sleep_time += lcore_idle_hint;
-- 
2.17.1