[dpdk-dev] [PATCH v3 3/6] test/spinlock: get timestamp more precisely

Gavin Hu gavin.hu at arm.com
Thu Dec 27 05:13:46 CET 2018


To precisely benchmark the spinlock performance, uses the precise
version of getting timestamps, which enforces the timestamps are
obtained at the expected places.

Signed-off-by: Gavin Hu <gavin.hu at arm.com>
Reviewed-by: Phil Yang <phil.yang at arm.com>
---
 test/test/test_spinlock.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/test/test_spinlock.c b/test/test/test_spinlock.c
index 6795195ae..648474833 100644
--- a/test/test/test_spinlock.c
+++ b/test/test/test_spinlock.c
@@ -113,14 +113,14 @@ load_loop_fn(void *func_param)
 	if (lcore != rte_get_master_lcore())
 		while (rte_atomic32_read(&synchro) == 0);
 
-	begin = rte_get_timer_cycles();
+	begin = rte_rdtsc_precise();
 	while (time_diff < hz * TIME_MS / 1000) {
 		if (use_lock)
 			rte_spinlock_lock(&lk);
 		lcount++;
 		if (use_lock)
 			rte_spinlock_unlock(&lk);
-		time_diff = rte_get_timer_cycles() - begin;
+		time_diff = rte_rdtsc_precise() - begin;
 	}
 	lock_count[lcore] = lcount;
 	return 0;
-- 
2.11.0



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