[dpdk-stable] [PATCH] test/ring_perf: fix error statistics in bulk enq/dequeue

[Feifei Wang]

In size 32 bulk ring enq/dequeue performance test, the "Total count"
statistics is incorrect. For example, running the test on lcore 25 and
lcore 26, the output is as follows:

The test command:
$sudo ./arm64-armv8a-linuxapp-gcc/app/test -l 25-26
RTE>>ring_perf_autotest

Bulk enq/dequeue count on size 32
Core [25] count = 288268
Core [26] count = 288281
Total count (size: 32): 1066323

Fixed it by reset the counter at the beginning of each loop. The
revised output is as follows:

Bulk enq/dequeue count on size 32
Core [25] count = 285643
Core [26] count = 285688
Total count (size: 32): 571331

Fixes: 759cf9b5632c ("test/ring: enhance mp/mc coverage")
Cc: stable at dpdk.org

Signed-off-by: Feifei Wang <feifei.wang2 at arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>
Reviewed-by: Phil Yang <phil.yang at arm.com>
---
 app/test/test_ring_perf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/app/test/test_ring_perf.c b/app/test/test_ring_perf.c
index ee21faf71..ac9bf5608 100644
--- a/app/test/test_ring_perf.c
+++ b/app/test/test_ring_perf.c
@@ -380,7 +380,7 @@ load_loop_fn_16B(void *p)
 static int
 run_on_all_cores(struct rte_ring *r, const int esize)
 {
-	uint64_t total = 0;
+	uint64_t total;
 	struct thread_params param;
 	lcore_function_t *lcore_f;
 	unsigned int i, c;
@@ -392,6 +392,7 @@ run_on_all_cores(struct rte_ring *r, const int esize)
 
 	memset(&param, 0, sizeof(struct thread_params));
 	for (i = 0; i < RTE_DIM(bulk_sizes); i++) {
+		total = 0;
 		printf("\nBulk enq/dequeue count on size %u\n", bulk_sizes[i]);
 		param.size = bulk_sizes[i];
 		param.r = r;
-- 
2.17.1