[dpdk-dev] [PATCH 2/4] test/cycles: increase threshold for containers on aarch64

[Ruifeng Wang]

rte_delay_us_xxx could have more deviation than expected when system
load is high. Test case failures were observed on Travis CI which run
unit test in container for aarch64.

Use looser criteria for cycle tests on aarch64.

Signed-off-by: Ruifeng Wang <ruifeng.wang at arm.com>
Reviewed-by: Gavin Hu <gavin.hu at arm.com>
---
 app/test/test_cycles.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/app/test/test_cycles.c b/app/test/test_cycles.c
index 015a9290f..52bc9af81 100644
--- a/app/test/test_cycles.c
+++ b/app/test/test_cycles.c
@@ -30,6 +30,13 @@ check_wait_one_second(void)
 	uint64_t hz = rte_get_timer_hz();
 	uint64_t max_inc = (hz / 100); /* 10 ms max between 2 reads */
 
+#if defined(RTE_ARCH_ARM64)
+	/* When testing in containers, 'delay' could have less accuracy
+	 * if system is busy.
+	 */
+	max_inc = 3 * max_inc;
+#endif
+
 	/* check that waiting 1 second is precise */
 	prev_cycles = rte_get_timer_cycles();
 	rte_delay_us(1000000);
-- 
2.17.1