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

[Ananyev, Konstantin]

> 
> 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;
> --

Acked-by: Konstantin Ananyev <konstantin.ananyev at intel.com>

> 2.17.1