On 12/28/2018 9:03 PM, Konstantin Ananyev wrote:
> In some cases crypto-ops could never be dequeued from the crypto-device.
> The easiest way to reproduce:
> start ipsec-secgw with crypto-dev and send to it less then 32 packets.
> none packets will be forwarded.
> Reason for that is that the application does dequeue() from crypto-queues
> only when new packets arrive.
> This patch makes sure it calls dequeue() on a regular basis.
>
> Fixes: c64278c0c18b ("examples/ipsec-secgw: rework processing loop")
> Cc: sta...@dpdk.org
>
> Signed-off-by: Konstantin Ananyev <konstantin.anan...@intel.com>
> Acked-by: Radu Nicolau <radu.nico...@intel.com>
> ---
> examples/ipsec-secgw/ipsec-secgw.c | 136 ++++++++++++++++++++++++-----
> examples/ipsec-secgw/ipsec.c | 60 ++++++++-----
> examples/ipsec-secgw/ipsec.h | 11 +++
> 3 files changed, 165 insertions(+), 42 deletions(-)
[snip]
> +
> /* main processing loop */
> static int32_t
> main_loop(__attribute__((unused)) void *dummy)
> @@ -866,7 +958,8 @@ main_loop(__attribute__((unused)) void *dummy)
> diff_tsc = cur_tsc - prev_tsc;
>
> if (unlikely(diff_tsc > drain_tsc)) {
> - drain_buffers(qconf);
> + drain_tx_buffers(qconf);
> + drain_crypto_buffers(qconf);
> prev_tsc = cur_tsc;
> }
>
> @@ -880,6 +973,9 @@ main_loop(__attribute__((unused)) void *dummy)
> if (nb_rx > 0)
> process_pkts(qconf, pkts, nb_rx, portid);
> }
> +
> + drain_inbound_crypto_queues(qconf, &qconf->inbound);
> + drain_outbound_crypto_queues(qconf, &qconf->outbound);
drain_inbound_crypto_queues and drain_outbound_crypto_queues should be called
based on diff_tsc.
moving these two lines above after drain_crypto_buffers will improve the
performance drop caused due to this patch.
