From: Qiming Yang <qiming.yang@intel.com>
Date: Tue, 20 Jun 2017 03:24:11 +0000 (+0800)
Subject: test/alarm: add delay tolerance
X-Git-Tag: spdx-start~2497
X-Git-Url: http://git.droids-corp.org/?p=dpdk.git;a=commitdiff_plain;h=82d708384ff0bfeaa282b338f5e9dcd7e3fa41ed

test/alarm: add delay tolerance

Because accuracy of timing to the microsecond is not guaranteed
in rte_eal_alarm_set, this function will not be called before
the requested time, but may be called a period of time
afterwards which can not be calculated. In order to ensure
test alarm running success, this patch added the delay time
before check the flag.

Signed-off-by: Qiming Yang <qiming.yang@intel.com>
Acked-by: Jing Chen <jing.d.chen@intel.com>
---

diff --git a/test/test/test_alarm.c b/test/test/test_alarm.c
index ecb2f6d457..40f55b57f6 100644
--- a/test/test/test_alarm.c
+++ b/test/test/test_alarm.c
@@ -47,6 +47,7 @@
 
 #define RTE_TEST_ALARM_TIMEOUT 10 /* ms */
 #define RTE_TEST_CHECK_PERIOD   3 /* ms */
+#define RTE_TEST_MAX_REPEAT    20
 
 static volatile int flag;
 
@@ -96,6 +97,7 @@ static int
 test_multi_alarms(void)
 {
 	int rm_count = 0;
+	int count = 0;
 	cb_count.cnt = 0;
 
 	printf("Expect 6 callbacks in order...\n");
@@ -169,7 +171,10 @@ test_multi_alarms(void)
 		printf("Error, cancelling head-of-list leads to premature callback\n");
 		return -1;
 	}
-	rte_delay_ms(10);
+
+	while (flag != 2 && count++ < RTE_TEST_MAX_REPEAT)
+		rte_delay_ms(10);
+
 	if (flag != 2) {
 		printf("Error - expected callback not called\n");
 		rte_eal_alarm_cancel(test_remove_in_callback, (void *)-1);
@@ -212,7 +217,7 @@ test_alarm(void)
 		printf("fail to set alarm callback\n");
 		return -1;
 	}
-	while (flag == 0 && count ++ < 6)
+	while (flag == 0 && count++ < RTE_TEST_MAX_REPEAT)
 		rte_delay_ms(RTE_TEST_CHECK_PERIOD);
 
 	if (flag == 0){