Re: [dpdk-dev] [PATCH] app/test/ipsec: fix logic around dequeue burst

["Ananyev, Konstantin" <konstantin.ananyev@intel.com>]

Hi Bernard,

/ipsec: fix logic around dequeue burst
> 
> Call rte_crypto_dequeue_burst() in a loop with
> a delay to ensure that all the  packets are dequeued
> from the crtpto device.
> 
> Fixes: 59d7353b0df0 ("test/ipsec: fix test suite setup")
> Cc: stable@dpdk.org
> Signed-off-by: Bernard Iremonger <bernard.iremonger@intel.com>
> ---
>  app/test/test_ipsec.c | 42 +++++++++++++++++++++++++++++++-----------
>  1 file changed, 31 insertions(+), 11 deletions(-)
> 
> diff --git a/app/test/test_ipsec.c b/app/test/test_ipsec.c
> index 80a2d25..25a7df4 100644
> --- a/app/test/test_ipsec.c
> +++ b/app/test/test_ipsec.c
> @@ -9,7 +9,7 @@
>  #include <rte_mbuf.h>
>  #include <rte_malloc.h>
>  #include <rte_memcpy.h>
> -#include <rte_pause.h>
> +#include <rte_cycles.h>
>  #include <rte_bus_vdev.h>
>  #include <rte_ip.h>
> 
> @@ -42,6 +42,7 @@
>  #define OUTBOUND_SPI	17
>  #define BURST_SIZE		32
>  #define REORDER_PKTS	1
> +#define DEQUEUE_COUNT	1000
> 
>  struct user_params {
>  	enum rte_crypto_sym_xform_type auth;
> @@ -758,7 +759,9 @@ crypto_ipsec(uint16_t num_pkts)
>  	struct ipsec_testsuite_params *ts_params = &testsuite_params;
>  	struct ipsec_unitest_params *ut_params = &unittest_params;
>  	uint32_t k, ng;
> +	uint32_t pkt_cnt;
>  	struct rte_ipsec_group grp[1];
> +	int i;
> 
>  	/* call crypto prepare */
>  	k = rte_ipsec_pkt_crypto_prepare(&ut_params->ss[0], ut_params->ibuf,
> @@ -774,9 +777,15 @@ crypto_ipsec(uint16_t num_pkts)
>  		return TEST_FAILED;
>  	}
> 
> -	k = rte_cryptodev_dequeue_burst(ts_params->valid_dev, 0,
> -		ut_params->cop, num_pkts);
> -	if (k != num_pkts) {
> +	for (i = 0, pkt_cnt = 0;
> +		i < DEQUEUE_COUNT && pkt_cnt != num_pkts; i++) {
> +		k = rte_cryptodev_dequeue_burst(ts_params->valid_dev, 0,
> +				&ut_params->cop[pkt_cnt], num_pkts - pkt_cnt);
> +		pkt_cnt += k;
> +		rte_delay_us(1);
> +	}

Looks good to me.
My only suggestion would be to put that loop in a separate function
to avoid duplications.
Apart from that:
Acked-by: Konstantin Ananyev <konstantin.ananyev@intel.com>

> +
> +	if (pkt_cnt != num_pkts) {
>  		RTE_LOG(ERR, USER1, "rte_cryptodev_dequeue_burst fail\n");
>  		return TEST_FAILED;
>  	}
> @@ -868,7 +877,7 @@ crypto_ipsec_2sa(void)
>  	struct ipsec_testsuite_params *ts_params = &testsuite_params;
>  	struct ipsec_unitest_params *ut_params = &unittest_params;
>  	struct rte_ipsec_group grp[BURST_SIZE];
> -
> +	uint32_t pkt_cnt;
>  	uint32_t k, ng, i, r;
> 
>  	for (i = 0; i < BURST_SIZE; i++) {
> @@ -890,9 +899,14 @@ crypto_ipsec_2sa(void)
>  		}
>  	}
> 
> -	k = rte_cryptodev_dequeue_burst(ts_params->valid_dev, 0,
> -		ut_params->cop, BURST_SIZE);
> -	if (k != BURST_SIZE) {
> +	for (i = 0, k = 0, pkt_cnt = 0;
> +		i < DEQUEUE_COUNT && pkt_cnt != BURST_SIZE; i++) {
> +		k = rte_cryptodev_dequeue_burst(ts_params->valid_dev, 0,
> +				&ut_params->cop[pkt_cnt], BURST_SIZE - pkt_cnt);
> +		pkt_cnt += k;
> +		rte_delay_us(1);
> +	}
> +	if (pkt_cnt != BURST_SIZE) {
>  		RTE_LOG(ERR, USER1, "rte_cryptodev_dequeue_burst fail\n");
>  		return TEST_FAILED;
>  	}
> @@ -1007,6 +1021,7 @@ crypto_ipsec_2sa_4grp(void)
>  	struct ipsec_unitest_params *ut_params = &unittest_params;
>  	struct rte_ipsec_group grp[BURST_SIZE];
>  	uint32_t k, ng, i, j;
> +	uint32_t pkt_cnt;
>  	uint32_t rc = 0;
> 
>  	for (i = 0; i < BURST_SIZE; i++) {
> @@ -1029,9 +1044,14 @@ crypto_ipsec_2sa_4grp(void)
>  		}
>  	}
> 
> -	k = rte_cryptodev_dequeue_burst(ts_params->valid_dev, 0,
> -		ut_params->cop, BURST_SIZE);
> -	if (k != BURST_SIZE) {
> +	for (i = 0, k = 0, pkt_cnt = 0;
> +		i < DEQUEUE_COUNT && pkt_cnt != BURST_SIZE; i++) {
> +		k = rte_cryptodev_dequeue_burst(ts_params->valid_dev, 0,
> +				&ut_params->cop[pkt_cnt], BURST_SIZE - pkt_cnt);
> +		pkt_cnt += k;
> +		rte_delay_us(1);
> +	}
> +	if (pkt_cnt != BURST_SIZE) {
>  		RTE_LOG(ERR, USER1, "rte_cryptodev_dequeue_burst fail\n");
>  		return TEST_FAILED;
>  	}
> --
> 2.7.4